Chemical Reactions Study Guide Mr. Bannister Name:________________________________ Class:________________________________ 1. What is a chemical reaction? 2. What is the only way to prove a chemical reaction has occurred? 3. When water boils on the stove, does a chemical change or a physical change take place? 4. List nine clues indicating a chemical reaction has occurred: 5. Write out the balanced combustion reaction of ethane, C2H6. 6. What does the “Mn” above the arrow in a formula equation mean? 7. Solid silicon and solid magnesium chloride form when silicon tetrachloride gas reacts with magnesium metal. Write a balanced formula equation. Include all of the appropriate notations. What type or reaction is this? 8. Magnesium oxide forms from magnesium metal and oxygen gas. Write a balanced formula equation. Include all of the appropriate notations. What type or reaction is this? 9. Write the word equation and the formula equation for the electrolysis of water. Indicate all physical states and conditions of this reaction. 10. Balance each of the following equations. Correctly write down a sentence that describes the reaction, including physical states, reaction conditions, and type or reaction. a. ___Zn(s) + ___HCl(aq) ___ZnCl2(aq) + ___H2(g) b. ___CaCl2(aq) + ___Na2CO3(aq) ___CaCO3(s) + ___NaCl(aq) c. ___NaOH(aq) + ___H3PO4(aq) ___Na3PO4(aq) +___ H2O(l) d. ___CaCO3(s) ___CaO(s) + ___CO2(g) 11. What fundamental law is demonstrated in balancing equations? 12. What is meant by a balanced equation? 13. When balancing an equation, should you adjust the subscripts or the coefficients? Why? 14. Write out and balance the following word equations using proper symbols and notations. Classify each reaction as combustion, synthesis, decomposition, single displacement, or double displacement. a. When heated, potassium chlorate yields potassium chloride and oxygen. Chemical Reactions Study Guide Mr. Bannister Name:________________________________ Class:________________________________ b. Silver sulfide (s) forms when silver (s) and S8(s) react. c. Solid sodium hydrogen carbonate yields solid sodium carbonate, carbon dioxide, and water vapor. 15. Write out a word equation and then balance the following equations. Classify each reaction as combustion, synthesis, decomposition, single displacement, or double displacement. a. ___ZnS + ___O2 ___ZnO + ___SO2 b. ___Fe2O3 + ___CO ___Fe + ___CO2 c. ___AgNO3 + ___AlCl3 ___AgCl + ___Al(NO3)3 d. ___Ni(ClO3)2 ___NiCl2 + ___O2 e. ___ (NH4)2Cr2O7 ___Cr2O3 + ___N2 + ___H2O f. ___NH3 + ___CuO ___N2 + ___Cu + ___H2O g. ___Na2SiF6 + ___Na ___Si + ___NaF h. ___C4H10 + ___O2 ___CO2 + ___H2O 16. Write a balanced equation for the formations of water from hydrogen and oxygen. Use the atomic mass of each element to determine the mass of each molecule in the equation. Use these masses to show that the equation demonstrates the law of conservation of mass. 17. A student writes the equation below as the balanced equation for the reaction of iron with chlorine. Is this equation correct? Explain. Fe(s) + Cl3(g) FeCl3(s) 18. Explain how synthesis and decomposition reactions can be the reverse of one another. Chemical Reactions Study Guide Mr. Bannister Name:________________________________ Class:________________________________ 19. What two products are formed when hydrocarbons burn completely? 20. Explain how to use activity series to predict chemical behavior. 21. What must be produced for a double displacement reaction to occur? 22. Balance each of the equations below and indicate the type of reaction for each equation. a. ___Cl2(g) + ___NaBr(aq) ___NaCl(aq) + ___Br2(l) b. ___CaO(s) + ___H2O(l) ___Ca(OH)2(aq) c. ___Ca(ClO3)2(s) ___CaCl2(s) + ___ O2(g) d. ___AgNO3(aq) + ___K2SO4(aq) ___Ag2SO4(aq) + ___KNO3(aq) e. ___Zn(s) + ___CuBr2(aq) ___ ZnBr2(aq) + ___Cu(s) f. ___C8H18(l) + ___O2(g) ___ + ___ 23. Platinum is used for jewelry because it does not corrode. Where would you expect to find platinum on the activity series? 24. Predict whether a reaction would occur when the materials indicated are brought together. For each reaction that would occur, complete and balance the equation. a. Ag(s) + H2O(l) b. Mg(s) + Cu(NO3)2(aq) c. Al(s) + O2(g) d. H2SO4(aq) + KOH(aq) 25. Predict the products, write a balanced equation, and identify the type of reaction for each of the following reactions. a. ___HgO b. ___C3H7OH + ___O2 c. ___Zn + ___CuSO4 d. ___BaCl2 + ___Na2SO4 e. ___Zn + ___F2 f. ___C5H10 + ___O2 26. How can you tell if a compound is soluble or insoluble? 27. Explain why the term spectator ion is used. 28. What chemicals are present in a net ionic equation? Chemical Reactions Study Guide Mr. Bannister Name:________________________________ Class:________________________________ 29. Is the following net ionic equation correct? Explain. Na+(aq) + Cl-(aq) NaCl(aq) 30. Identify the spectator ion(s) in the following reaction: MgSO4(aq) + 2AgNO3(aq) Ag2SO4(s) + Mg(NO3)2(aq) 31. Determine the total ionic equation for the following reactions. From that, cancel out the spectator ions and determine the final net ionic equation. a. ___Br2(l) + ___NaI(aq) ___NaBr(aq) + ___I2(s) b. ___Ca(OH)2(aq) + ___HCl(aq) ___CaCl2(aq) + ___H2O(l) c. ___Mg(s) + ___AgNO3(aq) ___Ag(s) + ___Mg(NO3)2(aq) d. ___AgNO3(aq) + ___KBr(aq) e. ___Ni(s) + ___Pb(NO3)2(aq) ___ +___ f. ___Ca(s) + ___H2O(l) ___ + ___ g. Silver nitrate + sodium sulfate h. Aluminum + nickel(II)iodide i. Potassium sulfate + calcium chloride j. Magnesium + copper(II)bromide k. Lead(II)nitrate + sodium chloride 32. Why is K+ always a spectator ion? 33. Explain why no reaction occurs if a double displacement reactions has four spectator ions.