1. © 2015 Pearson Education, Inc. Chapter 7 Chemical Reactions Laurie LeBlanc Cuyamaca College Clicker Questions

2. © 2015 Pearson Education, Inc. A.Formation of a precipitate B.Color change C.Emission of light D.Evolution of gas E.All of the above Which of the following is evidence that a chemical reaction has occurred?

3. © 2015 Pearson Education, Inc. A.Formation of a precipitate B.Color change C.Emission of light D.Evolution of gas E.All of the above Which of the following is evidence that a chemical reaction has occurred?

4. © 2015 Pearson Education, Inc. A.Digesting a candy bar B.Burning propane in a gas stove C.Grinding coffee beans D.Baking a cake E.Tarnishing of silverware Which of the following is NOT an example of a chemical reaction?

5. © 2015 Pearson Education, Inc. A.Digesting a candy bar B.Burning propane in a gas stove C.Grinding coffee beans D.Baking a cake E.Tarnishing of silverware Which of the following is NOT an example of a chemical reaction?

6. © 2015 Pearson Education, Inc. A.Changing the subscripts to balance an equation is acceptable. B.The products are listed on the left and the reactants are listed on the right. C.Atoms are conserved when balancing a chemical equation. D.Coefficients can be fractions. E.Subscripts can be fractions. Which of the following is true?

7. © 2015 Pearson Education, Inc. A.Changing the subscripts to balance an equation is acceptable. B.The products are listed on the left and the reactants are listed on the right. C.Atoms are conserved when balancing a chemical equation. D.Coefficients can be fractions. E.Subscripts can be fractions. Which of the following is true?

8. © 2015 Pearson Education, Inc. A.1 B.2 C.3 D.4 E.6 What is the coefficient for aluminum after the following equation is balanced? Al + O 2 → Al 2 O 3

9. © 2015 Pearson Education, Inc. A.1 B.2 C.3 D.4 E.6 What is the coefficient for aluminum after the following equation is balanced? Al + O 2 → Al 2 O 3

10. © 2015 Pearson Education, Inc. A.4 B.6 C.12 D.8 E.10 What is the sum of the coefficients after the following equation is balanced? Al 2 O 3 + H 2 SO 4 → Al 2 (SO 4 ) 3 + H 2 O

11. © 2015 Pearson Education, Inc. A.4 B.6 C.12 D.8 E.10 What is the sum of the coefficients after the following equation is balanced? Al 2 O 3 + H 2 SO 4 → Al 2 (SO 4 ) 3 + H 2 O

12. © 2015 Pearson Education, Inc. A.0.66 B.1.0 C.1.66 D.1.5 E.2.5 When the following equation is balanced, what is the ratio of oxygen molecules to water molecules? C 5 H 10 + O 2 → CO 2 + H 2 O

13. © 2015 Pearson Education, Inc. A.0.66 B.1.0 C.1.66 D.1.5 E.2.5 When the following equation is balanced, what is the ratio of oxygen molecules to water molecules? C 5 H 10 + O 2 → CO 2 + H 2 O

14. © 2015 Pearson Education, Inc. A.CaBr 2 B.NaNO 3 C.C 6 H 12 O 6 D.Two are strong electrolytes E.All of the above Which of the following compounds is a strong electrolyte?

15. © 2015 Pearson Education, Inc. A.CaBr 2 B.NaNO 3 C.C 6 H 12 O 6 D.Two are strong electrolytes E.All of the above Which of the following compounds is a strong electrolyte?

16. © 2015 Pearson Education, Inc. A.Li 2 SO 4 B.KOH C.CaCO 3 D.NH 4 NO 3 E.NaCl Which of the following compounds is INSOLUBLE in water?

17. © 2015 Pearson Education, Inc. A.Li 2 SO 4 B.KOH C.CaCO 3 D.NH 4 NO 3 E.NaCl Which of the following compounds is INSOLUBLE in water?

18. © 2015 Pearson Education, Inc. A.electrical compound. B.strong electrolyte. C.weak electrolyte. D.weak cation. E.nonelectrolyte. A substance dissolved in water that CANNOT conduct an electric current is called a(n)

19. © 2015 Pearson Education, Inc. A.electrical compound. B.strong electrolyte. C.weak electrolyte. D.weak cation. E.nonelectrolyte. A substance dissolved in water that CANNOT conduct an electric current is called a(n)

20. © 2015 Pearson Education, Inc. A.left to form another precipitate. B.only anions. C.only cations. D.removed from the solution. E.left dissolved in the solution. The ions that do not directly form the precipitate during a precipitation reaction are

21. © 2015 Pearson Education, Inc. A.left to form another precipitate. B.only anions. C.only cations. D.removed from the solution. E.left dissolved in the solution. The ions that do not directly form the precipitate during a precipitation reaction are

22. © 2015 Pearson Education, Inc. A.CaNO 3 B.AgCl C.Ca(NO 3 ) 2 D.AgCl 2 E.CaAg Identify the solid product formed from the balanced reaction of silver nitrate and calcium chloride.

23. © 2015 Pearson Education, Inc. A.CaNO 3 B.AgCl C.Ca(NO 3 ) 2 D.AgCl 2 E.CaAg Identify the solid product formed from the balanced reaction of silver nitrate and calcium chloride.

24. © 2015 Pearson Education, Inc. A.KCl B.BaNO 3 C.K 2 Cl D.Ba(NO 3 ) 2 E.No solid is formed. Identify the solid product formed from the balanced reaction of potassium nitrate and barium chloride.

25. © 2015 Pearson Education, Inc. A.KCl B.BaNO 3 C.K 2 Cl D.Ba(NO 3 ) 2 E.No solid is formed. Identify the solid product formed from the balanced reaction of potassium nitrate and barium chloride.

26. © 2015 Pearson Education, Inc. A.Ba 2 SO 4 (s) B.NaCl(aq) C.BaSO 4 (aq) D.NaCl(s) E.SO 2 (g) Which of the following is a product for the following reaction? BaCl 2 (aq) + Na 2 SO 4 (aq) →

27. © 2015 Pearson Education, Inc. A.Ba 2 SO 4 (s) B.NaCl(aq) C.BaSO 4 (aq) D.NaCl(s) E.SO 2 (g) Which of the following is a product for the following reaction? BaCl 2 (aq) + Na 2 SO 4 (aq) →

28. © 2015 Pearson Education, Inc. A.Mg 2+ (aq) B.OH – (aq) C.Mg(OH) 2 (s) D.Two of the above E.All of the above Which of the following is a term in the complete ionic equation for the following reaction? LiOH(aq) + MgCl 2 (aq) →

29. © 2015 Pearson Education, Inc. A.Mg 2+ (aq) B.OH – (aq) C.Mg(OH) 2 (s) D.Two of the above E.All of the above Which of the following is a term in the complete ionic equation for the following reaction? LiOH(aq) + MgCl 2 (aq) →

30. © 2015 Pearson Education, Inc. A.KNO 3 (s) B.N 3– (aq) C.PbI 2 (aq) D.PbI(s) E.None of the above Which of the following is a term in the complete ionic equation for the following reaction? KI(aq) + Pb(NO 3 ) 2 (aq) →

31. © 2015 Pearson Education, Inc. A.KNO 3 (s) B.N 3– (aq) C.PbI 2 (aq) D.PbI(s) E.None of the above Which of the following is a term in the complete ionic equation for the following reaction? KI(aq) + Pb(NO 3 ) 2 (aq) →

32. © 2015 Pearson Education, Inc. A.Li + and H + B.Li + and NO 3 – C.Li + and OH – D.H + and OH – E.All of the above What are the spectator ions for the following reaction? LiOH(aq) + HNO 3 (aq) →

33. © 2015 Pearson Education, Inc. A.Li + and H + B.Li + and NO 3 – C.Li + and OH – D.H + and OH – E.All of the above What are the spectator ions for the following reaction? LiOH(aq) + HNO 3 (aq) →

34. © 2015 Pearson Education, Inc. A.HCl B.NaCl C.Al(NO 3 ) 3 D.H 2 O E.NH 4 Cl Which of the following is a nonelectrolyte in an aqueous solution?

35. © 2015 Pearson Education, Inc. A.HCl B.NaCl C.Al(NO 3 ) 3 D.H 2 O E.NH 4 Cl Which of the following is a nonelectrolyte in an aqueous solution?

36. © 2015 Pearson Education, Inc. A.Water B.Sodium chloride C.Potassium perchlorate D.Potassium hydride E.Potassium chlorate What salt is formed from the neutralization reaction between perchloric acid and potassium hydroxide?

37. © 2015 Pearson Education, Inc. A.Water B.Sodium chloride C.Potassium perchlorate D.Potassium hydride E.Potassium chlorate What salt is formed from the neutralization reaction between perchloric acid and potassium hydroxide?

38. © 2015 Pearson Education, Inc. A.Water B.Sodium chloride C.Oxygen D.Carbon dioxide E.Ammonium chloride When an acid reacts with a base, what product is typically formed?

39. © 2015 Pearson Education, Inc. A.Water B.Sodium chloride C.Oxygen D.Carbon dioxide E.Ammonium chloride When an acid reacts with a base, what product is typically formed?

40. © 2015 Pearson Education, Inc. A.Ammonia B.Nitrogen dioxide C.Hydrogen D.Carbon dioxide E.Nitrogen Which gas is released from the reaction of calcium carbonate with nitric acid?

41. © 2015 Pearson Education, Inc. A.Ammonia B.Nitrogen dioxide C.Hydrogen D.Carbon dioxide E.Nitrogen Which gas is released from the reaction of calcium carbonate with nitric acid?

42. © 2015 Pearson Education, Inc. A.1 B.3 C.4 D.5 E.6 How many molecules of carbon dioxide are produced from the combustion of one molecule of propane (C 3 H 8 )?

43. © 2015 Pearson Education, Inc. A.1 B.3 C.4 D.5 E.6 How many molecules of carbon dioxide are produced from the combustion of one molecule of propane (C 3 H 8 )?

44. © 2015 Pearson Education, Inc. A.Precipitation B.Acid–base C.Oxidation–reduction D.Double displacement E.Two of the above What type of reaction occurs between Ba(NO 3 ) 2 and K 2 CrO 4 ?

45. © 2015 Pearson Education, Inc. A.Precipitation B.Acid–base C.Oxidation–reduction D.Double displacement E.Two of the above What type of reaction occurs between Ba(NO 3 ) 2 and K 2 CrO 4 ?

46. © 2015 Pearson Education, Inc. A.Synthesis/combination B.Decomposition C.Single displacement D.Double displacement E.Two of the above What type of reaction is the following? HgO (s) → Hg(l) + O 2 (g)

47. © 2015 Pearson Education, Inc. A.Synthesis/combination B.Decomposition C.Single displacement D.Double displacement E.Two of the above What type of reaction is the following? HgO (s) → Hg(l) + O 2 (g)

48. © 2015 Pearson Education, Inc. A.Oxidation–reduction B.Combustion C.Synthesis/combination D.All of the above E.Two of the above What type of reaction is the following? 4Fe(s) + O 2 (g) → 2Fe 2 O 3 (s)

49. © 2015 Pearson Education, Inc. A.Oxidation–reduction B.Combustion C.Synthesis/combination D.All of the above E.Two of the above What type of reaction is the following? 4Fe(s) + O 2 (g) → 2Fe 2 O 3 (s)

50. © 2015 Pearson Education, Inc. A.Precipitation B.Acid–base C.Double displacement D.Single displacement E.Two of the above What type of reaction is the following? Fe(s) + 2HCl(aq) → FeCl 2 (aq) + H 2 (g)

51. © 2015 Pearson Education, Inc. A.Precipitation B.Acid–base C.Double displacement D.Single displacement E.Two of the above What type of reaction is the following? Fe(s) + 2HCl(aq) → FeCl 2 (aq) + H 2 (g)

52. © 2015 Pearson Education, Inc. A.Na 2 SO 4 B.H 2 SO 4 C.SO 2 gas D.NaNO 2 E.N 2 gas When NaHSO 3 reacts with HNO 3, what product is formed?

53. © 2015 Pearson Education, Inc. A.Na 2 SO 4 B.H 2 SO 4 C.SO 2 gas D.NaNO 2 E.N 2 gas When NaHSO 3 reacts with HNO 3, what product is formed?

54. © 2015 Pearson Education, Inc. A.H 2 O B.SO 2 gas C.K 2 SO 4 D.Two of the above E.None of the above When sulfuric acid reacts with potassium hydroxide, what product is formed?

55. © 2015 Pearson Education, Inc. A.H 2 O B.SO 2 gas C.K 2 SO 4 D.Two of the above E.None of the above When sulfuric acid reacts with potassium hydroxide, what product is formed?

56. © 2015 Pearson Education, Inc. A.oxygen reacts with another substance. B.electrons are transferred from one reactant to another. C.a nonmetal and a metal react. D.All of the above Redox reactions are those in which

57. © 2015 Pearson Education, Inc. A.oxygen reacts with another substance. B.electrons are transferred from one reactant to another. C.a nonmetal and a metal react. D.All of the above Redox reactions are those in which

58. © 2015 Pearson Education, Inc. A.NaI(aq) + PbNO 3 (aq) B.CuCl 2 (aq) + K 2 CO 3 (aq) C.Mg(s) + O 2 (g) D.HCl(aq) + NaOH(aq) E.All of the above Which of the following sets of reactants will result in a redox reaction?

59. © 2015 Pearson Education, Inc. A.NaI(aq) + PbNO 3 (aq) B.CuCl 2 (aq) + K 2 CO 3 (aq) C.Mg(s) + O 2 (g) D.HCl(aq) + NaOH(aq) E.All of the above Which of the following sets of reactants will result in a redox reaction?

60. © 2015 Pearson Education, Inc. A.CH 4 (g) and O 2 (g) B.H 2 (g) and O 2 (g) C.CO 2 (g) and H 2 O(g) D.C 2 H 6 (g) E.None of the above When compounds containing carbon and hydrogen react with oxygen in combustion reactions what is/are produced?

61. © 2015 Pearson Education, Inc. A.CH 4 (g) and O 2 (g) B.H 2 (g) and O 2 (g) C.CO 2 (g) and H 2 O(g) D.C 2 H 6 (g) E.None of the above When compounds containing carbon and hydrogen react with oxygen in combustion reactions what is/are produced?