© 2015 Pearson Education, Inc.

Chapter 7

ChemicalReactions

Laurie LeBlancCuyamaca College

Clicker Questions

© 2015 Pearson Education, Inc.

A. Formation of a precipitateB. Color changeC. Emission of lightD. Evolution of gasE. All of the above

Which of the following is evidence that a chemical reaction has occurred?

© 2015 Pearson Education, Inc.

A. Formation of a precipitateB. Color changeC. Emission of lightD. Evolution of gasE. All of the above

Which of the following is evidence that a chemical reaction has occurred?

© 2015 Pearson Education, Inc.

A. Digesting a candy barB. Burning propane in a gas stoveC. Grinding coffee beansD. Baking a cakeE. Tarnishing of silverware

Which of the following is NOT an example of a chemical reaction?

© 2015 Pearson Education, Inc.

A. Digesting a candy barB. Burning propane in a gas stoveC. Grinding coffee beansD. Baking a cakeE. Tarnishing of silverware

Which of the following is NOT an example of a chemical reaction?

© 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?

© 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?

© 2015 Pearson Education, Inc.

A. 1B. 2C. 3D. 4E. 6

What is the coefficient for aluminum after the following equation is balanced?

Al + O2 → Al2O3

© 2015 Pearson Education, Inc.

A. 1B. 2C. 3D. 4E. 6

What is the coefficient for aluminum after the following equation is balanced?

Al + O2 → Al2O3

© 2015 Pearson Education, Inc.

A. 4B. 6C. 12D. 8E. 10

What is the sum of the coefficients after the following equation is balanced?

Al2O3 + H2SO4 → Al2(SO4)3 + H2O

© 2015 Pearson Education, Inc.

A. 4B. 6C. 12D. 8E. 10

What is the sum of the coefficients after the following equation is balanced?

Al2O3 + H2SO4 → Al2(SO4)3 + H2O

© 2015 Pearson Education, Inc.

A. 0.66B. 1.0C. 1.66D. 1.5E. 2.5

When the following equation is balanced, what is the ratio of oxygen molecules to water molecules?

C5H10 + O2 → CO2 + H2O

© 2015 Pearson Education, Inc.

A. 0.66B. 1.0C. 1.66D. 1.5E. 2.5

When the following equation is balanced, what is the ratio of oxygen molecules to water molecules?

C5H10 + O2 → CO2 + H2O

© 2015 Pearson Education, Inc.

A. CaBr2

B. NaNO3

C. C6H12O6

D. Two are strong electrolytesE. All of the above

Which of the following compounds is a strong electrolyte?

© 2015 Pearson Education, Inc.

A. CaBr2

B. NaNO3

C. C6H12O6

D. Two are strong electrolytesE. All of the above

Which of the following compounds is a strong electrolyte?

© 2015 Pearson Education, Inc.

A. Li2SO4

B. KOHC. CaCO3

D. NH4NO3

E. NaCl

Which of the following compounds is INSOLUBLE in water?

© 2015 Pearson Education, Inc.

A. Li2SO4

B. KOHC. CaCO3

D. NH4NO3

E. NaCl

Which of the following compounds is INSOLUBLE in water?

© 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)

© 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)

© 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

© 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

© 2015 Pearson Education, Inc.

A. CaNO3

B. AgClC. Ca(NO3)2

D. AgCl2E. CaAg

Identify the solid product formed from the balanced reaction of silver nitrate and calcium chloride.

© 2015 Pearson Education, Inc.

A. CaNO3

B. AgClC. Ca(NO3)2

D. AgCl2E. CaAg

Identify the solid product formed from the balanced reaction of silver nitrate and calcium chloride.

© 2015 Pearson Education, Inc.

A. KClB. BaNO3

C. K2Cl

D. Ba(NO3)2

E. No solid is formed.

Identify the solid product formed from the balanced reaction of potassium nitrate and barium chloride.

© 2015 Pearson Education, Inc.

A. KClB. BaNO3

C. K2Cl

D. Ba(NO3)2

E. No solid is formed.

Identify the solid product formed from the balanced reaction of potassium nitrate and barium chloride.

© 2015 Pearson Education, Inc.

A. Ba2SO4(s)

B. NaCl(aq)C. BaSO4(aq)

D. NaCl(s)E. SO2(g)

Which of the following is a product for the following reaction?

BaCl2(aq) + Na2SO4(aq) →

© 2015 Pearson Education, Inc.

A. Ba2SO4(s)

B. NaCl(aq)C. BaSO4(aq)

D. NaCl(s)E. SO2(g)

Which of the following is a product for the following reaction?

BaCl2(aq) + Na2SO4(aq) →

© 2015 Pearson Education, Inc.

A. Mg2+(aq)B. OH–(aq)C. Mg(OH)2(s)

D. Two of the aboveE. All of the above

Which of the following is a term in the complete ionic equation for the following reaction?

LiOH(aq) + MgCl2(aq) →

© 2015 Pearson Education, Inc.

A. Mg2+(aq)B. OH–(aq)C. Mg(OH)2(s)

D. Two of the aboveE. All of the above

Which of the following is a term in the complete ionic equation for the following reaction?

LiOH(aq) + MgCl2(aq) →

© 2015 Pearson Education, Inc.

A. KNO3(s)

B. N3–(aq)C. PbI2(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(NO3)2(aq) →

© 2015 Pearson Education, Inc.

A. KNO3(s)

B. N3–(aq)C. PbI2(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(NO3)2(aq) →

© 2015 Pearson Education, Inc.

A. Li+ and H+ B. Li+ and NO3

–

C. Li+ and OH–

D. H+ and OH–

E. All of the above

What are the spectator ions for the following reaction?

LiOH(aq) + HNO3(aq) →

© 2015 Pearson Education, Inc.

A. Li+ and H+ B. Li+ and NO3

–

C. Li+ and OH–

D. H+ and OH–

E. All of the above

What are the spectator ions for the following reaction?

LiOH(aq) + HNO3(aq) →

© 2015 Pearson Education, Inc.

A. HClB. NaClC. Al(NO3)3

D. H2O

E. NH4Cl

Which of the following is a nonelectrolyte in an aqueous solution?

© 2015 Pearson Education, Inc.

A. HClB. NaClC. Al(NO3)3

D. H2O

E. NH4Cl

Which of the following is a nonelectrolyte in an aqueous solution?

© 2015 Pearson Education, Inc.

A. WaterB. Sodium chlorideC. Potassium perchlorateD. Potassium hydrideE. Potassium chlorate

What salt is formed from the neutralization reaction between perchloric acid and potassium hydroxide?

© 2015 Pearson Education, Inc.

A. WaterB. Sodium chlorideC. Potassium perchlorateD. Potassium hydrideE. Potassium chlorate

What salt is formed from the neutralization reaction between perchloric acid and potassium hydroxide?

© 2015 Pearson Education, Inc.

A. WaterB. Sodium chlorideC. OxygenD. Carbon dioxideE. Ammonium chloride

When an acid reacts with a base, what product is typically formed?

© 2015 Pearson Education, Inc.

A. WaterB. Sodium chlorideC. OxygenD. Carbon dioxideE. Ammonium chloride

When an acid reacts with a base, what product is typically formed?

© 2015 Pearson Education, Inc.

A. AmmoniaB. Nitrogen dioxideC. HydrogenD. Carbon dioxideE. Nitrogen

Which gas is released from the reaction of calcium carbonate with nitric acid?

© 2015 Pearson Education, Inc.

A. AmmoniaB. Nitrogen dioxideC. HydrogenD. Carbon dioxideE. Nitrogen

Which gas is released from the reaction of calcium carbonate with nitric acid?

© 2015 Pearson Education, Inc.

A. 1B. 3C. 4D. 5E. 6

How many molecules of carbon dioxide are produced from the combustion of one molecule of propane (C3H8)?

© 2015 Pearson Education, Inc.

A. 1B. 3C. 4D. 5E. 6

How many molecules of carbon dioxide are produced from the combustion of one molecule of propane (C3H8)?

© 2015 Pearson Education, Inc.

A. PrecipitationB. Acid–baseC. Oxidation–reductionD. Double displacementE. Two of the above

What type of reaction occurs between Ba(NO3)2 and K2CrO4?

© 2015 Pearson Education, Inc.

A. PrecipitationB. Acid–baseC. Oxidation–reductionD. Double displacementE. Two of the above

What type of reaction occurs between Ba(NO3)2 and K2CrO4?

© 2015 Pearson Education, Inc.

A. Synthesis/combinationB. DecompositionC. Single displacementD. Double displacementE. Two of the above

What type of reaction is the following?

HgO (s) → Hg(l) + O2(g)

© 2015 Pearson Education, Inc.

A. Synthesis/combinationB. DecompositionC. Single displacementD. Double displacementE. Two of the above

What type of reaction is the following?

HgO (s) → Hg(l) + O2(g)

© 2015 Pearson Education, Inc.

A. Oxidation–reductionB. CombustionC. Synthesis/combinationD. All of the aboveE. Two of the above

What type of reaction is the following? 4Fe(s) + O2(g) → 2Fe2O3(s)

© 2015 Pearson Education, Inc.

A. Oxidation–reductionB. CombustionC. Synthesis/combinationD. All of the aboveE. Two of the above

What type of reaction is the following? 4Fe(s) + O2(g) → 2Fe2O3(s)

© 2015 Pearson Education, Inc.

A. PrecipitationB. Acid–baseC. Double displacementD. Single displacementE. Two of the above

What type of reaction is the following?

Fe(s) + 2HCl(aq) → FeCl2(aq) + H2(g)

© 2015 Pearson Education, Inc.

A. PrecipitationB. Acid–baseC. Double displacementD. Single displacementE. Two of the above

What type of reaction is the following?

Fe(s) + 2HCl(aq) → FeCl2(aq) + H2(g)

© 2015 Pearson Education, Inc.

A. Na2SO4

B. H2SO4

C. SO2 gas

D. NaNO2

E. N2 gas

When NaHSO3 reacts with HNO3, what product is formed?

© 2015 Pearson Education, Inc.

A. Na2SO4

B. H2SO4

C. SO2 gas

D. NaNO2

E. N2 gas

When NaHSO3 reacts with HNO3, what product is formed?

© 2015 Pearson Education, Inc.

A. H2O

B. SO2 gas

C. K2SO4

D. Two of the aboveE. None of the above

When sulfuric acid reacts with potassium hydroxide, what product is formed?

© 2015 Pearson Education, Inc.

A. H2O

B. SO2 gas

C. K2SO4

D. Two of the aboveE. None of the above

When sulfuric acid reacts with potassium hydroxide, what product is formed?

© 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

© 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

© 2015 Pearson Education, Inc.

A. NaI(aq) + PbNO3(aq)

B. CuCl2(aq) + K2CO3(aq)

C. Mg(s) + O2(g)

D. HCl(aq) + NaOH(aq)E. All of the above

Which of the following sets of reactants will result in a redox reaction?

© 2015 Pearson Education, Inc.

A. NaI(aq) + PbNO3(aq)

B. CuCl2(aq) + K2CO3(aq)

C. Mg(s) + O2(g)

D. HCl(aq) + NaOH(aq)E. All of the above

Which of the following sets of reactants will result in a redox reaction?

© 2015 Pearson Education, Inc.

A. CH4(g) and O2(g)

B. H2(g) and O2(g)

C. CO2(g) and H2O(g)

D. C2H6(g)

E. None of the above

When compounds containing carbon and hydrogen react with oxygen in combustion reactions what is/are produced?

© 2015 Pearson Education, Inc.

A. CH4(g) and O2(g)

B. H2(g) and O2(g)

C. CO2(g) and H2O(g)

D. C2H6(g)

E. None of the above

When compounds containing carbon and hydrogen react with oxygen in combustion reactions what is/are produced?