AP Chemistry – Summer Study Guide Future AP Chemistry Student: Attached you will find summer work which will review topics that were learned in Honors Chemistry. It is imperative that you review during the summer. We will begin by applying the concepts you have already mastered this past year and begin looking at problems in a new and exciting way. You may use any resource needed to complete this review packet. You may work with your peers; in fact, I encourage you to do so. Keep in mind that copying from your peers will do you no good, as you will ultimately be responsible for knowing this material. It is expected that ALL work is shown and completed on notebook paper, NOT on these worksheets. I will be collecting your work during the first week of school and it will be graded. If you have any questions, please e-mail me at Sfiligoj@hudson.edu and I will get back to you. If you would like to check out a text book to use over the summer, please stop by C100, as you will have to turn in your Honors Chemistry textbook at the end of this year. Enjoy your summer, Mrs. Sfiligoj Help Sessions this summer: Please attend any or all of these to help you work through this study guide. Where: Panera Hudson When: Tues, June 17th Tues, July 8th Tues, Jul 29th Time: 10:00am- 12:00pm Directions: Below you will find topics that are a review of material you learned in Chemistry. Beneath each topic are a series of questions pertaining to the topic. Answer each of the questions with the following in mind: show all work, label all numbers with units and species (ex: 3 grams of NaCl), and provide your answer with correct units and significant figures…On another sheet of paper…i.e. not in this packet! \ AP Chemistry Summer Study Guide 1. Measurement (Zumdahl-Zumdahl Section 1.3-1.8) A. Write the appropriate symbol in the blank, <, =, > 1. 303m_____303 X 103km 2. 500g_____0.500kg 3. 1.50cm3_____1.50 X 103 nm3 B. Explain how a volume measurement is made when measuring water in a graduated cylinder. C. Identify the best piece of lab equipment and process that would be used to measure the following: 1. Mass of a solid crystal reagent which is in excess. 2. Mass of a solid precipitate 3. Create 500ml of a 1M HCl solution from 2M stock 4. Volume of 15ml of a 0.05M NaCl solution 2. Significant Figure (Zumdahl-Zumdahl Section 1.5) A. Round off the following quantities to the indicated number of significant figures. 1. 7.4855 grams (3 significant figures) 2. 298.693 cm (5 significant figures) 3. 11.968 lbs. (1 significant figure) 4. 345 oz. (2 significant figures) B. Calculate the following to the correct number of significant figures. 1. X = 128.5 + 2116.44 – 2244.47 2. X = 0.004010 X 2.0000 X 50054 3. X = 12.6 + 0.3 + 256.5/ 1003.7 4. X = 12.20 – (1.60 + 4(0.36))1/2/ 1.3409 3. Dimensional Analysis (Zumdahl-Zumdahl Section 1.6) A. A metal slug weighing 25.17 grams is added to a flask with a volume of 59.7mL. It is found that 43.7 grams of methanol (density = 0.791 g/mL) must be added to the metal to fill the flask. What is the density of the metal? B. A solid with an irregular shape and a mass of 11.33 grams is added to a graduated cylinder filled with water (density = 1.00 g/mL) to the 35.0mL mark. After the solid sinks to the bottom, the water level is read to be at the 42.3mL mark. What is the density of the solid? C. Air is 21% oxygen by volume. Oxygen has a density of 1.31 g/L. What is the volume, in liters, of a room that holds enough air to contain 55 kilograms of oxygen? 4. Periodic Table & Atom: Protons, Neutrons, Electrons (Zumdahl-Zumdahl Sections 2.1-2.5, 3.1, 7.8, 7.11-7.13) A. Who discovered the electron? Describe the experiment that led to the deduction that electrons are negatively charged. B. Selenium is widely sold as a dietary supplement. It is advertised to “protect” women from breast cancer. Write the nuclear symbol for naturally occurring selenium. It has 34 protons and 46 neutrons. C. Complete the following table using the periodic table if necessary. Nuclear Charge Number of Number of Number of Symbol Protons Neutrons Electrons 79 0 35Br -3 7 7 +5 33 42 90 4+ 40Zr D. Strontium has four isotopes with the following masses: 83.9134 (0.56%), 85.9094 (9.86%), 86.9089 (7.00%), and 87.9056 (82.58%). Calculate the atomic mass of strontium. E. Define an isotope. What is the same and what is different? F. Complete the table below. Element Electron Configuration Mg 1s22s22p63s23p64s23d104p65s24d3 Br 1s22s22p63s23p64s23d104p65s24d105p66s25d106p1 G. Complete the table below. Element Orbital Diagram Ti Xe C Sc H. Define ionization energy. Arrange the following elements in order based on increasing ionization energy: Na, Mg, K I. Define atomic radius. Arrange the following elements in order based on decreasing atomic radii: Cl, S, Ca J. Define electronegativity. Arrange the following elements in order based on increasing electronegativity: Be, Mg, Ca. 5. Nomenclature (Zumdahl-Zumdahl Section 2.8) A. Complete the table below Name ICl3 N2O5 PH3 HNO2 HNO3 HCl K2Cr2O7 Fe2(SO3)3 NaClO MgCl2 B. Complete the table below. Name Iron (III) carbonate Sulfur hexafluoride Silicon dioxide Hypochlorous acid Oxalic acid Carbon monoxide Sulfur trioxide Copper (II) sulfate Barium oxide Titanium (IV) oxide Formula Formula C. Criticize each of the following statements. 1. In an ionic compound the number of cations is always equal to the number of anions. 2. The molecular formula for strontium bromide is SrBr2. 3. The mass number is always equal to the atomic number. 4. For any ion, the number of electrons is always more than the number of protons. 7. Molar Mass (Zumdahl-Zumdahl Section 3.3-3.4) A. Complete the following table for TNT, C7H5(NO2)3. Number of Grams Number of Moles Number of Molecules 127.2 1.248 4.32 X 1022 Number of N Atoms 5.55 X 1019 B. Calculate the molar mass of the following: 1. cane sugar, C12H22O11 2. laughing gas, N2O 3. vitamin A, C20H30O 8. Percent Composition (Zumdahl-Zumdahl Section 3.6) A. Turquoise has the following chemical formula: CuAl6(PO4)4(OH)8*4H2O. Calculate the mass percent of each element in turquoise. B. A tablet of Tylenol has a mass of 0.611 grams. It contains 251mg of its active ingredient, acetaminophen, C8H9NO2. 1. What is the mass percent of acetaminophen in a tablet of Tylenol? 2. Assume that all the nitrogen in the tablet is in the acetaminophen. How many grams of nitrogen are present in a tablet of Tylenol? 9. Simplest & Molecular Formulas (Zumdahl-Zumdahl Section 3.7) A. Determine the simplest formula of the following compounds: 1. the food enhancer MSG which has the composition 35.51%C, 4.77% H, 37.85% O, 8.29% N, and 13.6% Na. 2. Zircon, a diamond like mineral, which has the composition 34.91% O, 15.32% Si, and 49.76%Zr. 3. Nicotine which has the composition 74.0% C, 8.65% H, and 17.4% N. B. Explain how you would find the molecular formula given the simplest formula and the molar mass. 10. Balancing Equations (Zumdahl-Zumdahl Section 3.9) A. Balance the following equations: 1. H2S + SO2 S + H2O 2. CH4 + NH3 + O2 HCN + H2O 3. Fe2O3 + H2 Fe + H2O 11. Stoichiometry (Zumdahl-Zumdahl Section 3.10) A. Diborane, B2H6, can be prepared by the following reaction: 3NaBH4 + 4BF3 2B2H6 + 3NaBF4 1. How many moles of NaBH4 react with 1.299 moles of BF3? 2. How many moles of B2H6 can be obtained from 0.893 moles of NaBH4? 3. If 1.987 moles of B2H6 is obtained, how many moles of NaBF4 are produced? 4. How many moles of BF3 are required to produce 4.992 moles of NaBF4? 12. Limiting Reagents & Theoretical Yield (Zumdahl-Zumdahl Section 3.10) A. The Space Shuttle uses aluminum metal and ammonium perchlorate in its reusable booster rockets. The products of the reaction are aluminum oxide, aluminum chloride, nitrogen oxide gas, and steam. The reaction mixture contains 7.00 grams of aluminum and 9.32 grams of ammonium perchlorate. 1. Write the balanced equation for the reaction. 2. What is the theoretical yield of aluminum oxide? 3. If 1.56 grams of aluminum oxide is formed, what is the percent yield? 4. How many grams of excess reactant remain? B. Oxyacetylene torches used for welding reach temperatures near 2000oC. The reaction involved in the combustion of acetylene is 2C2H2 + 5O2 4CO2 + 2H2O 1. Starting with 175 grams of both acetylene and oxygen, what is the theoretical yield, in grams, of carbon dioxide? 2. If 68.5L (density = 1.85 g/L) of carbon dioxide is produced, what is the percent yield at the same conditions of temperature and pressue? 13. Molarity (Zumdahl-Zumdahl Section 4.1) A. A reagent bottle is labeled 0.450M K2CO3. 1. How many moles of K2CO3 are present in 45.6mL of this solution? 2. How many milliliters of this solution are required to furnish 0.800 moles of K2CO3? 3. Assuming no volume change, how many grams of K2CO3 do you need to add to 2.00L of this solution to obtain a 1.000M solution of K2CO3? 4. If 50.0mL of this solution is added to enough water to make 125mL of solution, what is the molarity of the diluted solution? 14. Ideal Gas Law (Zumdahl-Zumdahl Section 5.3) A. A piece of dry ice, CO2, has a mass of 22.50 grams. It is dropped into an evacuated 2.50L flask. What is the pressure in the flask at -0.4oC? B. Use the ideal gas law to complete the following table. Pressure Volume Temperature Moles o 1.75L 19 C 1.66 0.895atm 6oC 433mmHg 92.4mL 0.395 o 1.1atm 8.66L 25 C Grams 14.0 15. Light (speed, frequency, wavelength) (Zumdahl-Zumdahl Section 7.1) A. A photon of violet light has a wavelength of 423nm. Calculate 1. the frequency 2. the energy in joules pre photon 3. the energy in kilojoules per mole B. Describe the relationship between wavelength and frequency. C. Describe the relationship between energy and frequency. D. Explain which color of light in the visible spectrum has the highest energy. E. Explain which color of light in the visible spectrum has the longest wavelength. 16. Lewis Dot Structures (Zumdahl-Zumdahl Section 8.10) A. Complete the table below: Formula Lewis Dot 3-D Shape/ AXE Shape Name Structure Formula CCl4 NCl3 CO2 SO3 Angles Formula Polar Bonds (Y/N) Polar molecule (Y/N) Hybridization Number of / bonds Type(s) of IMF CCl4 NCl3 CO2 SO3 17. Redox Reactions (Zumdahl-Zumdahl Section 4.9-4.10) (NEW) A. Assign oxidation numbers to each element in the following examples. 1. P2O5 2. NH3 3. CO324. SnO2 5. NaMnO4 B. Explain the difference between oxidation and reduction and write a half reaction to represent each. C. Write a half-reaction to represent sodium being oxidized. D. Write a half reaction to represent fluorine being reduced. 18. Kinetics (Zumdahl-Zumdahl Section (Zumdahl-Zumdahl Section 12.2-12.3) A. The equation for the reaction between iodide and bromate ions in acidic solution is 6I- + BrO31- + 6H+ 3I2 + Br1- + 3H2O [I-] [BrO31-] [H+] 0.0020 0.0040 0.0020 0.0020 0.0080 0.0080 0.0160 0.0080 0.020 0.020 0.020 0.040 Initial Rate (mol/L*s) 8.89 X 10-5 1.78 X 10-4 1.78 X 10-4 3.56 X 10-4 1. What is the order of the reaction with respect to each reactant. 2. Write the rate expression for the reaction. 3. Calculate the rate constant with appropriate units. 19. Equilibrium (Zumdahl-Zumdahl Section 13.1-13.2) A. Write the mass action expressions for the following reactions: 1. I2(g) + 5F2(g) 2IF5(g) 2. CO(g) + 2H2(g) CH3OH(l) 3. 2H2S(g) + 3O2(g) 2H2O(l) + 2SO2(g) 4. SnO2(s) + 2H2(g) Sn(s) + 2H2O(l) B. A gaseous reaction mixture contains 0.30 atm SO2, 0.16atm Cl2, and 0.50 atm SOCl2 in a 2.0L flask. K = 0.011 for the equilibrium system SO2Cl2(g) SO2(g) + Cl2(g) 1. Is the system at equilibrium? Explain. 2. If it is not at equilibrium, in which direction will the system move to reach equilibrium? 20. Acids and Bases (Zumdahl-Zumdahl Section 14.1-14.3) (NEW) A. Find the pH and pOH of solutions with H+ ion concentrations of: 1. 6.0M 2. 4.6 X 10-8M 3. 7.2 X 10-14M B Write the net ionic neutralization reactions for each of the following: 1. Hydrocyanic acid is mixed with sodium hydroxide 2. Phosphoric Acid is mixed with ammonia 3. Hydrofluoric acid is mixed with methylamine 4. Sulfuric acid is mixed with ammonia 21. Nuclear Reactions (Zumdahl-Zumdahl Section 19.1-19.7) (NEW) A. Define emission reaction and bombardment reactions B. Write the symbols for the following and explain how the number of protons and mass number changes when the particle is a reactant, and as a product. Alpha, Beta, Gamma, Proton, Neutron C. Write balanced reactions for the following: 1. U-238 undergoes alpha emission 2. Th-185 undergoes beta emission 3. Cl-35 is bombarded with a neutron 4. Ni-63 is bombarded with a proton