Chapter Five & Six Ionic and Covalent Compounds Chapters Five and Six Ionic and Covalent Compounds DEFINE THE FOLLOWING TERMS AND GIVE AN EXAMPLE Element: Ion: Compound: Polyatomic ion: Page 1 of 80 Chapter Five & Six Ionic and Covalent Compounds SECTION 1: COVALENT BONDS (PG. 190 TO 191, 194-198) Formed by: Covalent Compounds Determined by: Can be either: PROPERTIES Page 2 of 80 Chapter Five & Six Ionic and Covalent Compounds CHARACTERISTICS OF IONIC COMPOUNDS pg. 171-175 Different from: Formed by: Ionic Compounds Characteristics/properties Page 3 of 80 Chapter Five & Six Ionic and Covalent Compounds PRACTICE: ELECTRON CONFIGURATIONS FOR IONS Element Full Electron Configuration H 1s1 He 1s2 Li 1s22s1 Al 1s22s22s1 P 1s22s22p63s23p3 Ar 1s22s22p63s23p6 Ca 1s22s22p63s23p64s2 Ga 1s22s22p63s23p64s23d104p1 Rb 1s22s22p63s23p64s23d104p65s1 I 1s22s22p63s23p64s23d104p65s24d105p5 Valence Electron Configuratio n Electrons it will gain/lose to become stable Resulting charge Page 4 of 80 Chapter Five & Six Ionic and Covalent Compounds POLYATOMIC IONS Hydroxide Sulfate Phosphate Carbonate Bicarbonate OH-1 SO4-2 PO4-3 CO3-2 HCO3-1 Nitrate Acetate Cyanide Ammonium Iodate NAME THE FOLLOWING COMPOUNDS: Name of positive Name of negative Compound ion ion Change ending? NO3-1 C2H3O2-1 CN-1 NH4+1 IO3-1 Name of Compound 1. BaCO3 2. NaOH 3. Na2SO4 4. H2S 5. Ag2CO3 6. K3PO4 7. Na2CO3 8. MgCl2 9. CaO 10. (NH4)3PO4 11. Na2O 12. BeCl2 13. CaS 14. NaNO3 15. LiNO3 16. BaSO4 17. Mg(CH3COO)2 18. CaSO4 19. LiF Page 5 of 80 Chapter Five & Six Ionic and Covalent Compounds Write the formula in the correct box using the switcheroo method Cl1- (CO3)2- (OH)1- (SO4)-2 (PO4)3- (NO3)1- Na+ (NH4)1+ K+ Ca2+ Mg2+ Zn2+ Fe3+ Al3+ Co3+ Fe2+ H+ Page 6 of 80 Chapter Five & Six Ionic and Covalent Compounds PRACTICE PROBLEMS: LEWIS DOT DIAGRAMS FOR ELEMENTS 1. Complete this table: Element Valence Electrons Dot Diagram O Ar S Li Si C P Cl H Page 7 of 80 Chapter Five & Six Ionic and Covalent Compounds PRACTICE PROBLEMS: LEWIS DOT DIAGRAMS/ LEWIS DOT STRUCTURES Draw Lewis Dot Structures for the following compounds Molecule Individual Dot Diagrams Total Number of Valence Electrons Determine central atom Final structure SCl2 AsF3 SiH4 CHF3 HS1- Page 8 of 80 Chapter Five & Six Ionic and Covalent Compounds Molecule Individual Dot Diagrams Total Number of Valence Electrons Determine central atom Final structure NF41+ IO1- PCl41+ CH4 Page 9 of 80 Chapter Five & Six Ionic and Covalent Compounds PRACTICE PROBLEMS: DOUBLE/TRIPLE BONDS Draw Lewis Structures for the following molecules. Molecule Individual Dot Diagrams Total number of Valence Electrons Determine central atom Final structure N2F2 O2 N2 CO2 NO1- Page 10 of 80 Chapter Five & Six Ionic and Covalent Compounds Practice Problems: Naming Covalent Compounds Using the rules for covalent compounds, name the following compounds: 1. P2O5 2. N2O3 3. CF4 4. PI5 5. SO2 6. SO3 7. H2S 8. CCl4 9. CS2 10. P2O3 11. NO3 Using the rules for covalent compounds, write formulas for the following compounds: 1. boron trifluoride 2. Diphosphorus pentoxide 3. Antimony trichloride 4. Silicon dioxide 5. Carbon tetrachloride 6. Diphosphorus pentasulfide Page 11 of 80 Chapter Five & Six Ionic and Covalent Compounds Write the formulas for the following covalent compounds: 1) antimony tribromide __________________________________ 2) hexaboron monosilicide __________________________________ 3) chlorine dioxide __________________________________ 4) hydrogen monoiodide __________________________________ 5) iodine pentafluoride __________________________________ 6) dinitrogen trioxide __________________________________ 7) Nitrogen trihydride __________________________________ 8) phosphorus triiodide __________________________________ Write the names for the following covalent compounds: 9) P4S5 __________________________________ 10) O2 __________________________________ 11) SeF6 __________________________________ 12) Si2Br6 __________________________________ 13) SCl4 __________________________________ 14) CH4 __________________________________ 15) B2Si __________________________________ 16) NF3 _________________________________ Page 12 of 80 Chapter Five & Six Ionic and Covalent Compounds Page 13 of 80 Chapter Five & Six Ionic and Covalent Compounds Page 14 of 80 Chapter Five & Six Ionic and Covalent Compounds Page 15 of 80 Chapter Five & Six Ionic and Covalent Compounds Page 16 of 80 Chapter Eight Chemical Equations and Reactions Chapter Eight: Chemical Equations & Reactions SECTION 1: DESCRIBING CHEMICAL REACTIONS (pg. 260 – 266) 1. 2. 3. Different from: Recognized by: 4. Chemical Change Represented by a: Which include both: Which often come with: Page 17 of 80 Chapter Eight Chemical Equations and Reactions REVIEW: WRITING FORMULAS FOR COMPOUNDS Write formulas for the following compounds (refer to Chapters 5 & 6 if you have problems): IONIC COMPOUNDS 1. sodium chloride 5. ammonium phosphide 2. magnesium fluoride 6. ammonium phosphate 3. rubidium oxide 7. magnesium nitrate 4. calcium carbonate COVALENT COMPOUND 8. trisulfur dioxide 11. boron triiodide 9. carbon monoxide 12. dinitrogen pentabromide 10. carbon tetrachloride MIXED IONIC AND COVALENT 1. carbon dioxide 10. potassium oxide 2. iron (III) chloride 11. sodium fluoride 3. phosphorus trichloride 12. sodium carbonate 4. sodium oxide 13. sulfur trioxide 5. magnesium hydroxide 14. lithium bromide 6. diphosphorus pentoxide 15. magnesium oxide 7. calcium chloride 16. ammonium chloride 8. water 9. barium sulfate Page 18 of 80 Chapter Eight PRACTICE PROBLEMS: WRITING WORD EQUATIONS For each of the following problems complete the following tasks. A. Write the word equation B. Convert the word equation into chemical formulas C. Identify the type of reaction D. Balance the reaction 1. When dissolved beryllium chloride reacts with dissolved silver nitrate in water, beryllium nitrate and silver chloride powder are made. A. B. C. D. 2. When isopropanol (C3H8O) burns in oxygen, carbon dioxide and water are produced. A. B. C. D. 3. When dissolved sodium hydroxide reacts with sulfuric acid (H2SO4), sodium sulfate and water are formed. A. B. C. D. Page 19 of 80 Chapter Eight 4. When fluorine gas is put into contact with calcium metal at high temperatures, calcium fluoride powder is created in an exothermic reaction. A. B. C. D. 5. When sodium metal reacts with iron (II) chloride, iron metal and sodium chloride are formed. A. B. C. D. 6. Hydrogen and nitrogen react together to produce ammonia gas (NH3). A. B. C. D. Page 20 of 80 Chapter Eight 7. Propane (C3H8) burns in oxygen to produce carbon dioxide and steam (water vapor). A. B. C. D. 8. When heated, aluminium reacts with solid copper (I) oxide to produce copper metal and aluminium oxide. A. B. C. D. 9. Potassium oxide is not a stable compound. In the presence of water, it readily converts into potassium hydroxide. A. B. C. D. Page 21 of 80 Chapter Eight 10. Sodium chloride and silver nitrate combine to form silver chloride and sodium nitrate. A. B. C. D. 11. Sodium bicarbonate decomposes, resulting in the formation of solid sodium carbonate as well as water vapor and carbon dioxide gas. A. B. C. D. 12. Poisonous hydrogen sulfide gas can be neutralized with sodium hydroxide. This reaction produces water and sodium sulfide. A. B. C. D. Page 22 of 80 Chapter Eight 13. Disposable lighters use butane, C4H10, as a fuel. The complete combustion of butane requires a supply of oxygen and results in the formation of carbon dioxide and water vapor. A. B. C. D. 14. Barium chloride combines with sodium carbonate to form barium carbonate and sodium chloride. A. B. C. D. 15. Sodium metal reacts violently with water. The reaction results in the formation of sodium hydroxide and flammable hydrogen gas, which often bursts into flame during the reaction. A. B. C. D. Page 23 of 80 Chapter Eight 16. Chlorine gas reacts with sodium oxide to produce oxygen gas and sodium chloride A. B. C. D. 17. Solid zinc metal combines with chlorine gas to form zinc chloride A. B. C. D. 18. Sodium bicarbonate (NaHCO3) decomposes to form solid sodium carbonate, carbon dioxide gas and water. A. B. C. D. Page 24 of 80 Chapter Eight SECTION TWO: BALANCING CHEMICAL EQUATIONS (PG. 267 TO 274) Which means: Matter is conserved Therefore: By changing: Never by: These indicate: These indicate Page 25 of 80 Chapter Eight MORE TYPES OF CHEMICAL REACTIONS TO IDENTIFY AND BALANCE 1. _____ Fe + _____O2 _____ Fe2O3 2. _____Zn + _____HCl _____ZnCl2 + _____H2 3. _____NiCl2 _____Ni + _____Cl2 4. _____C + _____H2 + _____O2 _____C2H6O 5. _____C12H22O11 _____C + _____H2O 6. _____LiI + _____Pb(NO3)2 _____LiNO3 + _____PbI2 7. _____CdCO3 _____CdO + _____CO2 8. _____Cl2 + _____KBr _____KCl + _____Br 9. _____BaCl2 + _____KIO3 _____Ba(IO3)2 + _____KCl 10. _____PH3 +_____ O2 _____P2O5 + _____H2O 11. _____C3H5ON + _____O2 _____CO2 + _____H2O + _____NO2 12. _____Hg(NO3)2 _____HgO + _____NO2 + _____O2 13. _____CH3NO2 + _____O2 _____NO2 ____CO2 + _____H2O 14. _____Al + _____S8 _____Al2S3 15. _____B2S3 + _____H2O _____H3BO3 + _____H2S 16. _____NH3 + _____Na _____H2 + _____NaNH2 17. _____Li3N + _____H2O _____NH3 + _____LiOH 18. _____CCl4 + _______O2 _____CCl2O +_____ Cl2 19. _____K + _____NH3 _____KNH2 + _____H2 Page 26 of 80 Chapter Eight Chemical Reactions: ____________________________________________________________________ Evidence of a Chemical Reaction 1. ______________________________ 4. ______________________________ 2. ______________________________ 5. ______________________________ 3. ______________________________ Chemical Reactions: ___________________________________ Two Parts to a Chemical Equation 1. ______________________ 2. ______________________ _____________________ ______________________ Writing formulas Ionic Compounds Covalent Compounds __________and ______________ ____________and ___________ 1. ______________________ 1. ________________________ 2. ______________________ 2. ________________________ 3. ______________________ 3. ________________________ Examples: Examples: Sodium Chloride Diphosphorus pentoxide Gallium nitride Boron trichloride Diatomic Molecules: _______________________________________________________________ 1) 2) 3) 4) 5) 6) 7) ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ Page 27 of 80 Chapter Eight Word Equations to Symbol Equations Example: Isopropanol (C3H8O) burns in oxygen, carbon dioxide and water are produced. Five Types of Reactions 1) Combination: ________________________________ Example: 2) Decomposition: ________________________________ Example: 3) Single Replacement:________________________________ Example: 4) Double Replacement:________________________________ Example: 5) Combustion: ________________________________ Example: Chemical Equations Provides information about the reactions ___________________________________________________________ ____________________________________________________________ ____________________________________________________________ Law of Conservation of Matter Matter cannot be _______________ or ________________. ____________________ = _________________________ Balancing Equations Never mess with _____________________ ALWAYS use _________________________ Page 28 of 80 Chapter Eight Examples: Magnesium + Hydrogen Chloride hydrogen + magnesium chloride ____NCl3 ______ N2 + _____Cl2 ___ Al2(SO4)3 + ___ Ca(OH)2 ___ Al(OH)3 + ___ CaSO4 Activity Series: ________________________________________________________________________ Elements arranged _____________________________________ Most ____________ on TOP Everything below an element _________________________ Page 29 of 80 Chapter Eight The Mole and Chemical Composition CONVERSION FACTORS USE CONVERSION FACTORS TO SOLVE THE FOLLOWING: 1. How many feet are in 2.6 miles? (1 mile = 5280 feet) (13728) 2. How many ounces are in 6.3 gallons (128 ounces in 1 gallon) (806.4) 3. How many troy ounces in 15 pounds (1 troy ounce = 0.07 pounds) (214) 4. How many seconds in 17 hours? (61,200) FACTOR LABEL PURPOSE: PROBLEM SOLVING USING THE FACTOR-LABEL METHOD. Simple Conversions: 1. How much does a person weigh in kilograms if that person weighs 128 lbs? (58) 2. How many centimeters are there in 16.2 inches? (41) 3. Express the volume of a 250 ml flask in liters. (0.250) 4. Express the volume of a 250 ml in quarts. (0.265) 5. How many grams are contained in 7.0 lbs. (3175) 6. Convert 3.4 miles to kilometers. (5.5) 7. Convert 3.4 miles to meters. (5470.6) 8. If an automobile is traveling 55 mi/hr, how fast is it traveling in kilometers per hour? (88) Page 30 of 80 Chapter Eight 9. A crucible weighs 57 grams. Express its mass in ounces. (2) Multiple Conversions: 10. Calculate the number of minutes in 5 days. (7,200) 11. Calculate the number of kilometers in 13,500 yards. (104) 12. How many seconds are there in seven hours? (25,200) 13. A bullet fired from a gun travels at a speed of 1500 ft each second. What is this speed in miles per hour? (1023) 14. Calculate the number of milliliters contained in a 2 pint carton of milk. (946) 15. How many hours are there in three years? (26,280) 16. A baseball leaves a bat at a speed of 45 m/sec. How fast is the ball traveling in miles per hour?(101) 17. How many pints of water are contained in 57,200 cm3. (1 cm3 = 1 ml) (121) Conversions involved in word problems 18. What is the cost of a pair of socks if a package of socks costs $4.89 and there are three pairs of socks per package? (1.63) 19. What is the cost to drive from San Francisco to Los Angeles, a distance of 405 miles, if the cost of gasoline is $1.24 per gallon and the automobile gets 18 miles per gallon of fuel? (27.90) 20. Determine the price per pound of paper, if each sheet of paper weighs 0.50 ounces, there are 500 sheets of paper in a ream, and a ream of paper can be purchased for $6.25. (0.40) Page 31 of 80 Chapter Eight 21. How many oranges are in a crate if the price of a crate of oranges is $8.85 and the price of oranges is $0.59 per pound. On average, there are three oranges per pound. (45) 22. How many cars are there in a freight train if it takes the entire train 3 minutes to pass a station as it travels 45 miles per hour. Each car is 50 ft. long. (238) 23. How many dozen eggs would need to be ordered for one week if a restaurant serves 45 people every morning, and on average, two thirds of the people order two eggs and one third of the people order the three-egg omelet? (Hint: make this a two part problem) (62) 24. Using the information in question 23, how much will the eggs cost, in dollars, if eggs are selling of 69 cents per dozen? (42.78) 25. If a car travels 40.75 feet in one second, how many miles will it travel in exactly one hour? 26. A flock of birds consumes 40.0 pounds of seed in four days. How many weeks will it take for the birds to consume 1400 kg of seed? 27. The approximate total number of minutes for a semester of school (including evenings and weekends) is 181,440. How many weeks is this? 28. Sound travels approximately at a rate of 344 meters per second through air. Determine this rate in miles per hour. 29. A high school senior was applying to college and wondered how many applications she needed to send. Her counselor explained that with the excellent grade she received in chemistry she would probably be accepted to one school out of every three to which she applied. [3 applications = 1 acceptance] She immediately realized that for each application she would have to write 3 essays, [1 application = 3 essays] and each essay would require 2 hours work [1 essay = 2 hours]. Of course writing essays is no simple matter. For each hour of serious essay writing, she would need to expend 500 calories [1 hour = 500 calories] which she could derive from her mother's apple pies [1 pie = 1000 calories]. Her mother will bake here one apple pie for every time she cleans here room. How many times would she have to clean her room in order to gain acceptance to 10 colleges? Page 32 of 80 Chapter Eight 30. A case of apples costs $16.00. What is the cost for twenty apples if a case contains 192 apples? 31. Consider the following: 3 bushels = 1 sack, 4 pecks = 1 bushel, 2 gallons = 1 peck. If the cost of a gallon of apples equals $4.50. How much would 20 sacks of apples cost? 32. Two dozen dimes will create a stack of approximately 1 inch in height. Nickels are as thick as 1-¾ dimes. How many nickels would you have if your stack reached 6 feet? 33. The recent rainfall averages 2.7 inches per day. In my back yard sits a wading pool 3 feet in depth. If I were cheap enough to let Mother Nature fill my pool for me, how many weeks would I have to wait, assuming it rains 3 days a week. 34. Walking burns 550 Calories an hour. A bacon, egg and cheese croissant contains 364 Calories. How many hours (each month) must I walk to work off a month’s worth of croissants? I each croissants 3 times a week. Assume that one month = 4 weeks 35. How many minutes will it take to drive to Los Angeles from San Francisco if an average speed of 72 mi/hr is maintained? The distance between the two cities is 350 kilometers. Page 33 of 80 Chapter Eight ATOM COUNT Compound H3PO4 # of atoms/molecule # molecules/mole 8 6.02 1023 Zn3(PO4)2 CuSO4 Fe2(CO3)3 NaNO3 HOCl H2Se CS2 Na2PO4 Mn2O3 KMnO4 Ti2O3 Sc2O3 Page 34 of 80 # atoms/mole H : 3(6.02 1023) = P : 6.02 1023 O : 4(6.02 1023) = Chapter Eight Molar Mass Calculate the molar mass for each of the following compounds. 1. N2H4 (32) 2. H3PO4 3. Zn3(PO4)2 (386) 4. CuSO4 5. Fe2(CO3)3 (292) 6. NaNO3 7. HOCl (52) 8. H2Se 9. CS2 (76) 10. Na2PO4 11. Mn2O3 (158) 12. KMnO4 13. Ti2O3 (144) 14. Sc2O3 15. C6H12O6 (180) 16. Mo(CO)6 17. NaC2H3O2 (82) 18. AgIO3 19. RaSO4 (322) 20. PbSO4 21. SrCrO4 (204) 22. Sr(NO3)2 23. Al2(SO4)3 (342) 24. (NH4)2SO4 Page 35 of 80 Chapter Eight PRACTICE PROBLEMS: MOLAR CONVERSIONS FOR ELEMENTS Calculate the mass in grams of each of the following: 1. 5.0 moles of C (60 ) 2. 8.00 moles of Al 3. 10.5 moles of O2 (336) 4. 200 moles of Cl2 5. 4.00 moles of Hg (802) 6. 7.00 moles of I2 7. 6.20 moles of Mg (149) 8. 9.20 moles of Fe Calculate the number of moles in the following: 1. 800 g of Ca (20) 2. 280 g of Fe 3. 560 g of Br (7.0) 4. 72 g Mg 5. 66 g of Mn (1.2) 6. 93 g of P 7. 80 kg of S (2500) 8. 1035 g of Pb Page 36 of 80 Chapter Eight Calculate the mass in grams of each of the following: 1. 5.00 moles of ZnO (405) 2. 12.0 moles of HCl 3. 6.00 moles of H2SO4 (588) 4. 7.500 moles of sugar, C12H22O11 5. 200 moles of Al2O3 (20,400) 6. 40.0 moles of Na2CO3 7. 80.0 moles of methane (1280) 8. 8.2 moles of CaCO3 Calculate the number of moles in each of the following: 1. 400 grams of NaOH (10) 2. 2700 grams of H2O 3. 814 grams of Ca(OH)2 (11.0) 4. 3.0 kilograms of CaCO3 Calculate the following: 1. mass of 192 moles of HCl (6912) 3. mass of 17.2 moles of Na2O (1067) 2. moles in 510 grams of Al2O3 4. moles in 36 kilograms of CaS Page 37 of 80 Chapter Eight More Mole Map Problems 1) Calculate the number of particles in 2.50 moles of Neon, Ne (1.51 1024) 0.050 moles of iron, Fe (3.0 1022) 2) Calculate the number of moles in 9.03 X 1023 atoms of Cu 3.76 X 1025 molecules of SO2 8.6 X 1018 electrons 3) Calculate the number of molecules in 12.5 g of nitrogen, N2 (2.69 1023) 0.76 g of ammonia, NH3 (2.7 1022) 0.60 g of hydrogen, H2 (1.8 1023) 4) Calculate the mass of 4.25 X 1024 atoms of C 6.02 X 1021 molecules of H2O one billion atoms of Zn one atom of U Page 38 of 80 Chapter Eight 5) Calculate the mass of 2.00 moles of water, H2O (36.0) 4.38 moles of chlorine, Cl2 (311) 0.025 moles of ammonia, NH3 (0.43) 1.8 moles of oxygen, O2 (58) 6) How many moles are in 15 grams of lithium? 7) How many grams are in 2.4 moles of sulfur? (77) 8) How many moles are in 9.8 grams of calcium? 9) How many grams are in 4.5 moles of sodium fluoride, NaF? (190) 10) How many moles are in 68 grams of copper (II) hydroxide, Cu(OH)2? 11) How many grams are in 2.3 x 10-4 moles of calcium phosphate, Ca3(PO3)2? (0.064) 12) What mass of carbon contains the same number of atoms as 1.008g of hydrogen? 13) What mass of oxygen contains the same number of atoms as 14.01g of nitrogen? (16.00) 14) What mass of nitrogen contains the same number of atoms as 48g of oxygen? 15) Which weighs more, 1 mole of helium atoms or 0.5 mole of carbon atoms? Page 39 of 80 Chapter Eight Page 40 of 80 Chapter Eight Page 41 of 80 Chapter Eight Page 42 of 80 Chapter Eight Page 43 of 80 Chapter Nine Stoichiometry Chapter Nine Stoichiometry SECTION 1: CALCULATING QUANTITIES (pg. 302-303) Balanced Equation Provides you with Which give you the amount of: Small scale Normal/everyday scale OR Which can give you the: (most important part) Which tells you: Page 44 of 80 Chapter Nine Stoichiometry PRACTICE PROBLEMS: MOLE RATIOS (CONVERSIONS) FROM BALANCED EQUATIONS. For each word equation below, write a balanced equation then write a conversion factor for the change requested. 1. Potassium + Sodium Sulfide Potassium Sulfide + Sodium 2K + Na2S K2S + 2Na a. Write a mole ratio for potassium to potassium sulfide b. Write a mole ratio for sodium sulfide to potassium. 2. Ammonium Nitrate + Magnesium Oxide Magnesium Nitrate + Ammonium Oxide 2 NH4NO3 + MgO Mg(NO3)2 + (NH4)2O a. Write a mole ratio for magnesium nitrate to magnesium oxide. b. Write a mole ratio for ammonium nitrate to magnesium nitrate 3. Hydrogen + Oxygen Water ____H2 + _____ O2 ____ H2O a. What is the mole ratio used to change from oxygen to water? b. What is the mole ratio used to change from hydrogen to oxygen? 4. Lithium Carbonate + Sodium Chloride Sodium Carbonate + Lithium Chloride ___Li2CO3 + ____NaCl ____ Na2CO3 + ____ LiCl a. Mole ratio for sodium chloride to sodium carbonate. b. Mole ratio of lithium carbonate to sodium carbonate. 5. Aluminum Oxide Aluminum and Oxygen 2 Al2O3 4 Al + 3 O2 a. Mole ratio from aluminum oxide to aluminum. b. Mole ratio from moles of oxygen to moles of aluminum oxide. Page 45 of 80 Chapter Nine Stoichiometry Stoichiometry Questions For each problem listed, write a balanced equation and then answer the questions that follow. 1. Lead (IV) Sulfate + Lithium Chloride Lithium Sulfate + Lead (IV) Chloride _____Pb2(SO4)4 + __8__ LiCl __4__ Li2SO4 + _2__PbCl4 a. What is the mole ratio for lead sulfate to lithium chloride? b. If I have two moles of lead sulfate, how many moles of lithium chloride will I need to react? 2. Use the equation from question #1 to answer these questions: a. How many moles of lead sulfate are needed to react with 2 moles of lithium chloride? b. How many moles of lead chloride will be produced if I have 1 mole of lead sulfate to react? c. Use factor label or a proportion to determine how many moles of lithium sulfate will form if I have 0.67 moles of lithium chloride. d. How many moles of lead chloride will be produced if I have 0.55 moles of lead sulfate to start with? 3. Aluminum + hydrogen sulfate Aluminum sulfate + hydrogen gas ____Al + ____ H2SO4 ____ Al2(SO4)3 + ____ H2 a. How many moles of aluminum will react with 3 moles of hydrogen sulfate? b. How many moles of aluminum sulfate will form when I react 0.87 moles of hydrogen sulfate? c. How many moles of hydrogen do I have, if I have 1.22 moles of aluminum? d. How many moles of aluminum will I need to react with 0.27 moles of hydrogen sulfate? Page 46 of 80 Chapter Nine Stoichiometry PRACTICE PROBLEMS: MORE MOLE-MOLE STOICHIOMETRY Balance the following equations and then convert as requested. 1. Iron (III) Nitrate + Copper (I) Hydroxide Iron (III) Hydroxide + Copper (I) Nitrate _____ Fe(NO3)3 + ____ CuOH ____ Fe(OH)3 + ____ CuNO3 a. How many moles of iron hydroxide can be produced from 2.6 moles of copper hydroxide? (0.87) b. How many moles of iron nitrate are needed to react with 0.5 moles of copper hydroxide? (0.17) 2. Barium Oxide + Silver Nitrate Silver Oxide + Barium Nitrate ____ BaO + _____AgNO3 ____Ag2O + ____ Ba(NO3)2 a. How many moles of silver oxide are produced if 3.5 moles of silver nitrate are used? (1.75) b. How many moles of barium nitrate are produced if 1.7 moles of silver oxide are also produced? (1.7) 3. Ammonium Phosphate + Barium Chloride Ammonium Chloride + Barium Phosphate ____ (NH4)3PO4 + ____ BaCl2 ____ NH4Cl + ____ Ba3(PO4)2 a. How many moles of barium chloride will react with 5 moles of ammonium phosphate? (7.5) b. How many moles of ammonium chloride are produced from 7.5 moles of ammonium phosphate? (22.5) 4. Lithium + Strontium Sulfide Lithium Sulfide + Strontium ____ Li + ___ SrS _____ Li2S + ____ Sr a. How many moles of strontium are produced when 2.5 moles of lithium are reacted? (1.25) b. How many moles of lithium sulfide are reacted when 0.57 moles of strontium sulfide are used up? Page 47 of 80 Chapter Nine Stoichiometry 5. Methane (CH4) + Oxygen Carbon Dioxide and Water CH4 + 2O2 CO2 + 2 H2O a. How many moles of water are produced from burning 2 moles of methane? (4 mol) b. How many moles of oxygen are consumed to produce 10 moles of water? (20 mol) 6. Ammonia (NH3) Nitrogen + Hydrogen ____ NH3 ____ N2 + ____ H2 a. What quantity (in moles) of hydrogen is released when 4.1 moles of ammonia decomposes? (6.15) b. How many moles of nitrogen are produced when 3 moles of hydrogen is also produced? (1 mol) Page 48 of 80 Chapter Nine Stoichiometry GETTING TO MOLES (PG. 304-310) Moles is a central unit, crucial to stoichiometry. But not every problem will give you moles. In this map, show the conversions that will allow you to “get to” moles so that you can perform stoichiometry. Which you get from: Which you get from: Convert, using: Convert, using: If you are given: If you are given: Moles If you are given: Which you get from: Convert, using: Page 49 of 80 Which you get from: Chapter Twelve Gases Even More Complex Stoichiometry Problems Use this balanced equation for questions 1 to 3: 2NaI + BaS BaI2 + Na2S 1. If I have 0.893 moles of BaS, how many grams of barium iodide can I produce? 2. Calculate how many moles of barium sulfide I need, if I have 177 grams of sodium iodide. 3. If 19 grams of barium iodide is produced, how many moles of sodium sulfide are also produced. Balance this equation, and use it for questions 4 to 7: _____Ga + _____S _____Ga2S3 4. Calculate the grams of gallium sulfide produced from 19 grams of sulfur. 5. Determine the grams of sulfur needed to produce 125 grams of gallium sulfide. 6. How many grams of sulfur are needed to react with 1.33 moles of gallium? 7. What amount (in grams) of gallium sulfide is produced if 1.77 moles of gallium is used? Balance the equation. This will be used to answer questions 8 through 10. _____C5H12 + _____O2 _____ CO2 + _____ H2O 8. Calculate the moles of carbon dioxide formed from 32 moles of oxygen. 9. Determine the grams of water formed when 124 grams of C5H12 are burned. 10. How many grams of oxygen are needed to burn 36 grams of C5H12. Page 50 of 80 Chapter Twelve Gases Page 51 of 80 Chapter Twelve Gases Page 52 of 80 Chapter Twelve Gases Chapter Twelve Gases SECTION ONE: CHARACTERISTICS OF GASES (pg. 416-422) Properties of Gases GASES Gas and Pressure Kinetic Molecular Theory Gas Relationships Page 53 of 80 Chapter Twelve Gases PRACTICE PROBLEMS: PRESSURE * TEMPERATURE CONVERSIONS Perform the following conversions: Remember: 101.325 kPa = 760 mmHg = 1 atm C +273 = Kelvin 1. 520 mmHg = atm 2. 75 kPa = mmHg 3. 93.7 kPa = atm 4. 97.25 kPa = Pa 5. 120,354 Pa = atm 6. 323 mmHg = kPa 7. 25 C = K 8. –30 C = K 9. 19 C = K 10. 323 K = C 11. 0 K = C 12. 255 K = C Page 54 of 80 Chapter Twelve Gases GAS -CONCEPTS - PRACTICE PROBLEMS 1. There are three cylinders drawn in the space below. The sizes of the cylinders can be changed by raising or lowering the piston. The volumes of the cylinders are labeled. Draw 15 particles in each cylinder to represent the particles of a gas. Remember that a gas expands to fill its container. 2. How do the numbers of particles in each cylinder vary with the volume of the cylinder? 3. How does the volume of the cylinder affect the pressure within the cylinder? Explain your answer. Page 55 of 80 Chapter Twelve Gases 4. Three balloons have been drawn in the space above. Initially all of the balloons were exactly the same size and they were filled with exactly the same amount of air. One balloon has been heated, one balloon is at room temperature and one balloon has been cooled. Fill each balloon with 15 particles to represent the particles of a gas. Then label which balloon has been heated, which is at room temperature and which has been cooled. 5. In which balloon are the particles the farthest apart? Why? 6. Make a general statement that reflects how the temperature of a gas is related to its volume. 7. As the temperature of a gas decreases, its volume decreases until a temperature of absolute zero (O K) is reached. Using the kinetic molecular theory, explain why the volume of a gas should eventually reach 0L as the temperature decreases. Be sure to also mention the speed of particles at temperatures above and equal to absolute zero. Page 56 of 80 Chapter Twelve Gases READING: GAS LAWS (PG. 423-432) Using the equation: Using the equation: Which relates the two properties: Which relates the two properties: Gas Laws Which relates the two properties: Using the equation: Which relates the two properties: Using the equation: Page 57 of 80 Chapter Twelve Gases Direct relationship Inverse relationship Amount constant Temperature constant Pressure constant Involves change in amount Involves volume change Involves pressure change Involves temperature change COMBINED GAS LAW PRACTICE Boyles Charles Avogadro’s Gay-Lussac P1 V1 T1 P2 1 1.5 atm 3.0 L 20 C 2.5 atm 2 720 torr 256 ml 25C 3 600 mmHg 2.5 L 22C 760 mmHg 1.8L 750 ml 0.0C 2.0 atm 500 ml 25C 101 kPa 6.0 L 471 K 900 torr 225 ml 150C 2.5 L 30C 100 ml 75C 4 5 95 kPa 4.0 L 6 650 torr 7 850 mmHg 1.5 L 8 125 kPa 125 ml 100C V2 30C 250 ml 15C 100 kPa T2 50C Page 58 of 80 Chapter Twelve Gases PRACTICE PROBLEMS: GAS LAW PROBLEMS 1. A sample of carbon dioxide occupies a volume of 3.50 liters at 1.5 atm pressure. What pressure would the gas exert if the volume were decreased to 2.00 L? (2.625 atm) 2. A 2.0 liter container of nitrogen had a pressure of 3.2 atm. What volume would be necessary to decrease the pressure to 1.0 atm? (6.4) 3. Ammonia gas occupies a volume of 450 ml at a pressure of 0.89 atm. What volume will it occupy at a standard pressure? (400.5) 4. A 175 ml sample of neon had its pressure changed from 0.6 atm to 1.4 atm. What is its new volume? (75) 5. A sample of hydrogen at 1.5 atm had its pressure decreased to 0.50 atm producing a new volume of 750 ml. What was its original volume? (250) 6. Bacteria produce methane gas in sewage treatment plants. This gas is often captured or burned. If a bacterial culture produces 60.0 mL of methane gas at 1.45 atm, what volume would be produced at 1 atm? (87) 7. At one sewage treatment plant, bacteria cultures produce 1000 L of methane gas per day at 10 atm pressure. What volume tank would be needed to store one day’s production at 5.0 atm. (2,000) 8. Hospitals buy 400 L cylinders of oxygen gas compressed at 150 atm. They administer oxygen to patients at 3.0 atm in a hyperbaric oxygen chamber. What volume of oxygen can a cylinder supply at this pressure? Page 59 of 80 Chapter Twelve Gases 9. A 1.00 L balloon is filled with helium at 1.20 atm. If the balloon is squeezed into a 0.500 L what is the new pressure? 10. A gas measured a volume of 100 mL under pressure of 0.75 atm. What would the volume be under a pressure of 1.2 atm with constant temperature? 11. A sample of gas is confined to a 100 ml flask under a pressure of 0.80 atm. If this same gas were transferred to a 50 ml flask, what would be the resulting pressure? 12. When measured at a temperature of 60°C, a volume of gas is 600 mL. What is the volume at 10°C? (510) 13. If 105 ml of oxygen at 25°C were heated until its volume expanded to 120 ml, what would be its final temperature? (341) 14. What will be the volume of 4°C of a quantity of gas that occupies 1L at 20°C? (0.95) 15. A quantity of hydrogen has a volume of 103 ml at a temperature of 20°C. To what temperature would this gas need to be cooled to reduce the volume to 92 ml? (262) 16. The temperature of a gas changes to 14.8°C from its original value of 1.6°C. If the original volume was 16.2 ml, what is the final volume of the gas at the new temperature? (16.98) 17. If 136 ml of nitrogen at 25°C is cooled to 0°C, what will be the new volume? (124.6) Page 60 of 80 Chapter Twelve Gases 1. It is much easier to slice a piece of pie with the edge of a sharp knife than with the edge of a pencil. Explain this observation in terms of applied pressure. 2. Heavy vehicles that must move easily over loose sand are often equipped with special tires. a. Would you expect these tires to be wide or narrow? b. Explain your answer using the concept of pressure. Imagine that you cause 8 to 10 highly elastic, small “super-bounce” balls to bounce around inside a box that you steadily shake; this serves as an analogy for gas molecules randomly bouncing around inside a sealed container. The balls bounce randomly around inside the box. 1. Decide which of these four gas variables- volume, temperature, pressure, or number of molecules- best matches each of the following factors, and explain each choice: a. The number of super-bounce balls inside the box b. The size of the box c. The vigor with which you shake the box d. The number and force of collisions of the randomly moving superbounce balls with the box walls 2. How does each of the following changes relate to what you learned about gases and the kinetic molecular theory? a. The vigor shaking and the number of super-bounce balls remain the same, but the size of the box is decreased. b. The size of the box and the number of super-bounce balls remain the same but the shaking becomes more vigorous. c. The size of the container and the vigor of shaking are kept the same, but the number of super-bounce balls is increased. Page 61 of 80 Chapter Twelve Gases Page 62 of 80 Chapter Twelve Gases Page 63 of 80 Types of Matter Semantic Map Can be separated by density Can be separated through boiling Created through physical means Created through a chemical reaction Differences can be seen with the naked eye Can be separated through filtration Can be separated through physical means Can be separated through chemical means Mixture Pure Contains 2 or more elements in a definite ratio Contains 2 or more substances in which the amount can vary Contains only one type of element Chapter Thirteen Solutions Chapter Thirteen Solutions REVIEW: TYPES OF MATTER ELEMENT Compound Heterogeneous Mixture Homogeneous Mixture Solution Suspension Colloid Page 64 of 80 Chapter Thirteen Solutions SECTION ONE: WHAT IS A SOLUTION? (pg. 454 – 459) Described as: Described as: Type Type Described as: Type Mixtures Can be separated by: Which is used when: Page 65 of 80 Chapter Fifteen Acids and Bases PRACTICE: CONCENTRATION PROBLEMS I Note: 1 g of water = 1 mL of water 1. Calculate the percent solution for a solution that is 25 grams solute and 125 grams solvent. 2. Determine the concentration of a solution (in ppm) if the solute is 170 grams and the solvent is 50 grams. 3. What is the molarity of a solution which contains 55 grams of NaCl and 750 ml of solution? 4. Calculate the concentration (in ppt) of a solution which contains 25 grams of magnesium chloride (MgCl2) dissolved in 912 ml of water. 5. Calculate the molarity of a solution of MgI2 if 45 grams is dissolved in 200 ml of solution. 6. What is the percent solution of a compound if 23 grams is dissolved in 150 ml of water? 7. 192 grams of Mg(NO3)2 is dissolved in 1200 ml of water. a. Calculate this concentration in pph. b. Calculate the molarity of this solution. 8. If 8.0 grams of NaOH is dissolved in 125 ml of water, what is the molarity of the resulting solution? 9. If 53 grams of PbCl2 is dissolved in 256 ml of water a. Calculate the concentration using percent solution. b. Determine the molarity of this solution. Page 66 of 80 Chapter Fifteen Acids and Bases 10. Calculate the molarity of a solution with 93 grams of AgC2H3O2 dissolved in 150 grams of water. 11. Determine the grams of solution dissolved if 200 milliters of a calcium oxide solution has a molarity of 3.0 M. 12. What amount of sodium chloride has been dissolved if a 250 ml solution of sodium chloride has a concentration of 57 pph? 13. How many grams of Kr will be needed to prepare 1500 ml of a 1.5 M solution? 14. A 1.5 M solution contains 0.27 moles of FeCl3. What is the volume of the solution in liters? 15. A 2.5 M solution of FeCl3 contains 33 grams of iron chloride. What is the volume of the solution in liters? 16. How many grams of HCl are in 65 ml of a 1.50 M solution? 17. What volume of 0.200 M CaCl2 solution can be prepared from 1.11 grams of solid CaCl2? 18. What is the molarity of a NaCl solution that was prepared by adding 23.4 grams of NaCl to 100 ml of water? Page 67 of 80 Chapter Fifteen Acids and Bases SATURATED/UNSATURATED/SUPERSATURATED PROBLEMS Complete the following problems: Note: 1 g water = 1 ml water 1. Sodium chloride has a solubility of 35.9 g/100 ml water. Use this information to determine if each of the following solutions is saturated, unsaturated or supersaturated. a. A solution of sodium chloride contains 85 grams dissolved in 150 ml of water. b. Twenty five grams of sodium chloride is dissolved in 75 grams of water. c. A salt water solution contains 135 grams of NaCl dissolved in 750 grams of water. 2. Silver Nitrate has a solubility of 152 g/100 ml of water. Use this information to determine if each of the following solutions is saturated, unsaturated or supersaturated. a. A solution of silver nitrate is created by dissolving 75 grams in 95 ml of water. b. 195 grams of silver nitrate is mixed in 200 grams of water. c. A silver nitrate solution is formed by mixing 500 grams of silver nitrate with 750 ml of water. 3. Copper chloride is not very soluble in water. It has a solubility of 0.0062 g/100 ml of water. Use this information to determine if each of the following solutions is saturated, unsaturated or supersaturated. a. 0.076 g of copper chloride is dissolved in 150 grams of water. b. 35 grams of copper chloride in 1.2 L of water. c. 0.0124 in 175 ml of water. Page 68 of 80 Chapter Fifteen Acids and Bases Remember to refer to the solubility graph study guide for hints on using a solubility graph. 1. Why do the temperatures on the graph only go from 0º C to 100º?________________________________________________________________ 2. Which substance is most soluble at 60º C ?________________________________ 3. Which two substances have the same solubility at 80º C ?_____________________________________________________ 4.Which substance’s solubility changes the most from 0º C to 100º C ?_________________________ 5.Which substance’s solubility changes the least from 0º C to 100º C ?_________________________ 6. What is the solubility of potassium nitrate at 90º C ? ______________________________________ 7. At what temperature does potassium iodide have a solubility of 150 g/ 100 cm3 water ?________________________ 8. You have a solution of sodium nitrate containing 140 g at 65º C. Is the solution saturated, unsaturated, or supersaturated ?_____________________________________________________________ 9. You have a solution of potassium chlorate containing 4 g at 65º C. How many additional gramsof solute must be added to it, to make the solution saturated ?________________________________ 10. A solution of potassium iodide at 70º C contains 200 g of dissolved solute in 100 cm3 water. The solution is allowed to cool. At what new temperature would crystals begin to start forming ? Page 69 of 80 Chapter Fifteen Acids and Bases Page 70 of 80 Chapter Fifteen Acids and Bases Page 71 of 80 Chapter Fifteen Acids and Bases Page 72 of 80 Chapter Fifteen Acids and Bases Page 73 of 80 Chapter Fifteen Acids and Bases Chapter Fifteen Acids and Bases SECTION ONE: WHAT ARE ACIDS AND BASES? (pg. 530-538) Conduct electricity Have a conjugate Have an Arhennius definition Have hydroxide ions React with many metals Can be strong or weak Found in cleansers Accept protons Have a Bronsted Lowry definition Generate Hydronium Ions Donate protons Found in fruit juice Acid-Base Semantic Map Acids Bases PRACTICE: WHAT IS AN ACID? 1. List two characteristics of acids and two characteristics of bases. 2. Complete the following: According to Arrhenius, all acids begin with a(n) ______________ and all bases contain a ________________. 3. A problem with the Arrhenius definition came about when scientists discovered that some __________________ such as ammonia, did not contain the OH they expected. 4. Scientists _______________ and _________________ adjusted the definition of acids. 5. Acids are now considered proton _______________ and bases are proton ____________. 6. A proton is the same thing as a(n) _________________ ion. 7. Using the Arrhenius definition, label each of the following compounds: acid, base, neither. e. Mg(OH)2 a. NaOH b. HC2H3O2 f. c. H3PO4 g. HCl d. CaSO4 h. (NH4)2CO3 i. LiOH HI Page 74 of 80 Chapter Fifteen Acids and Bases 8. For the equations written below, you will identify the conjugate acid and base. Remember, you will be labeling both sides. The first problem has been solved for you. a. HC2H3O2 + CO32- C2H3O1- + H2CO3 Acid base base acid b. HNO3 + NaOH H2O + NaNO3 c. NH3 + H2O NH4+ + OHd. HSO4- + HCN H2SO4 + CNPRACTICE: WEAK AND STRONG ACIDS & BASES Circle the correct word(s) to complete each statement. 1. A reaction is at equilibrium when the amounts of products and reactants are stable and equal/unchanging. 2. In any acid equation, one of the products will always be H+/OH3. A strong acid is one in which most of the acid breaks apart/stays together. 4. Write equations showing the dissociation of each of the following acid and bases. a. H2SO4 e. HF b. NaOH f. c. HC2H3O2 g. Mg(OH)2 HI d. Al(OH)3 Page 75 of 80 Chapter Fifteen Acids and Bases PRACTICE: pH WORKSHEET Circle the correct word(s) to complete each statement. 1. Acids dissociate in water to produce hydroxide/hydronium ions. 2. The higher the hydronium concentration the more/less acidic a substance is. 3. A substance with a low pH will have a high/low hydronium ion concentration. 4. The pH scale is a measure of the hydronium/hydroxide ion concentration. 5. The pH scale goes from zero to fourteen/twenty, with six/seven representing neutral and numbers above/below that representing acids. 6. Bases high on the pH scale are weaker/stronger than bases closer to neutral. 7. Acids low on the pH scale are weaker/stronger than acids closer to neutral. 8. A strong acid will conduct more/less than a weak acid due to the increase/decrease in ions. 9. A weak base will conduct more/less than a strong base due to the increase/decrease in ions. 10. Because H2SO4 is a strong acid/base, it will have a very high/low pH. 11. Vinegar has a [H3O+] of 1 10-6, which is higher/lower than milk’s [H3O+] of 1 10-8. This means that vinegar is more/less acidic than milk. 12. For each of the common household compounds below, use their hydronium ion concentration to calculate their pH. a. Dill pickles [H3O+] = 6.3 10-4 b. Cooked spinach [H3O+] = 6.5 10-8 c. Milk of Magnesia [H3O+] = 7.9 10-11 d. Cucumbers [H3O+] = 7.9 10-6 e. Eggs f. Battery Acid [H3O+] = 5.01 10-9 [H3O+] = 1 g. Ammonia [H3O+] = 3.16 10-12 h. Drain Cleaner [H3O+] = 1 10-14 13. Draw a pH scale below and: a. place the following terms on the scale: 0, 7, 14, neutral, acidic, basic. b. draw arrows showing the direction(s) of increasing conductivity. c. Place the items from #12 on the pH scale based on your calculated pH. Page 76 of 80 Chapter Fifteen Acids and Bases 14. Use your pH scale from #13 to answer the following: a. What was the most acidic item on your #6 list? b. What was the least acidic item? c. What was the most basic? d. Which item had the greatest hydronium ion concentration? e. Which item has the lowest hydronium ion concentration? Page 77 of 80 Chapter Fifteen Acids and Bases PRACTICE: NEUTRALIZATION WORKSHEET Circle the word(s) which best complete each statement. 1. An acid has certain properties, such as reacting to metal, which are eliminated/enhanced when the acid is neutralized. 2. In a neutralization reaction the products are always a(n) acid/water and a base/salt. 3. Scientists used indicators to determine the endpoint/concentration of a titration. 4. When neutralizing an acid, a more concentrated base will require a lower/higher volume than one that is less concentrated. 5. Before performing titration calculations, it is necessary to know the concentration/volume of your standard solution and the concentration/volume of your unknown solution. 6. The titration is completed to determine the volume/concentration of standard solution used, which allows us to calculate the volume/concentration of the unknown solution. 7. Complete the following titration problems: a. What volume of 3.5M NaOH will be required to titrate 100 ml of 3M HCl? b. What volume of 1.2M KOH will be necessary to neutralize 750 ml of a 2.5M HNO 3 solution. c. If I have 2.5L of Mg(OH)2, what concentration must it be to neutralize 330 ml of 1.2M HF? d. Calculate the concentration of 200 ml of HCl necessary to neutralize 500 ml of 5.5M LiOH solution. Page 78 of 80 Chapter Fifteen Acids and Bases Page 79 of 80 Chapter Fifteen Acids and Bases Page 80 of 80