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Chapter 7 Chemical Reactions

Chapter 7 Chemical Reactions. Which of the following is evidence that a chemical reaction has occurred?. 7.1. Formation of a precipitate Color change Emission of light Evolution of gas All of the above.

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Chapter 7 Chemical Reactions

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  1. Chapter 7Chemical Reactions

  2. Which of the following is evidence that a chemical reaction has occurred? 7.1 Formation of a precipitate Color change Emission of light Evolution of gas All of the above

  3. What is the coefficient for aluminum after the following equation is balanced?Al + O2→ Al2O3 7.4 1 2 3 4 6

  4. What is the sum of the coefficients after the following equation is balanced?Al2O3 + H2SO4→ Al2(SO4)3 + H2O 7.5 4 6 12 8 10

  5. When the following equation is balanced, what is the ratio of oxygen molecules to water molecules? C5H10 + O2→ CO2 + H2O 7.6 0.66 1.0 1.66 1.5 2.5

  6. Which of the following compounds is INSOLUBLE in water? 7.8 Li2SO4 KOH CaCO3 NH4NO3 NaCl

  7. A substance dissolved in water that CANNOT conduct an electric current is called a 7.9 electrical compound. strong electrolyte. weak electrolyte. weak cation. Nonelectrolyte.

  8. Identify the solid product formed from the balanced reaction of silver nitrate and calcium chloride. 7.11 CaNO3 AgCl Ca(NO3)2 AgCl2 CaAg

  9. Identify the solid product formed from the balanced reaction of potassium nitrate and barium chloride. 7.12 KCl BaNO3 K2Cl Ba(NO3)2 No solid is formed

  10. Which of the following is a term in the complete ionic equation for the following reaction? LiOH(aq) + MgCl2(aq) → 7.14 Mg2+(aq) OH–(aq) Mg(OH)2(s) Two of the above All of the above

  11. What salt is formed from the neutralization reaction between perchloric acid and potassium hydroxide? 7.18 Water Sodium chloride Potassium perchlorate Potassium hydride Potassium chlorate

  12. When an acid reacts with a base, what product is typically formed? 7.19 Water Sodium chloride Oxygen Carbon dioxide Ammonium chloride

  13. Which gas is released from the reaction of calcium carbonate with nitric acid? 7.20 Ammonia Nitrogen dioxide Hydrogen Carbon dioxide Nitrogen

  14. How many molecules of carbon dioxide are produced from the combustion of one molecule of propane (C3H8)? 7.21 1 3 4 5 6

  15. What type of reaction is the following?HgO(s) → Hg(l) + O2(g) 7.23 Synthesis/combination Decomposition Single displacement Double displacement Two of the above

  16. What type of reaction is the following?4Fe(s) + O2(g) → 2Fe2O3(s) 7.24 Oxidation–reduction Combustion Synthesis All of the above

  17. What type of reaction is the following? Fe(s) + 2HCl(aq) → FeCl2(aq) + H2(g) 7.25 Precipitation Acid–base Double displacement Single displacement

  18. When NaHSO3 reacts with HNO3, what product is formed? 7.26 Na2SO4 H2SO4 SO2 gas NaNO2 N2 gas

  19. When compounds containing carbon and hydrogen react with oxygen in combustion reactions what is/are produced? 7.30 CH4(g) and O2(g) H2(g) and O2(g) CO2(g) and H2O(g) C2H6(g) None of the above

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