Question 1

What is the molarity of a solution that contains 5.0 moles of solute in 2.00 liters of solution?

Accepted Answer

The answer of What is the molarity of a solution...

Question 2

What mass of Na2SO4 is needed to prepare 350.mL of a solution having a sodium ion concentration of 0.125 M?

Accepted Answer

A) 3.11 g 
B) 24.9 g 
C) 12.4 g 
D) 6.21 g 
E) 8.88 g 
A) 3.11 g 
B) 24.9 g 
C) 12.4 g 
D) 6.21 g 
E) 8.88 g

Question 3

Zinc dissolves in hydrochloric acid to yield hydrogen gas: Zn(s)+ 2HCl(aq)$\rarr$ZnCl2(aq)+ H2(g)
When a 12.7 g chunk of zinc dissolves in 500.mL of 1.450M HCl, what is the concentration of hydrogen ions remaining in the final solution?

Accepted Answer

A) 0.776 M 
B) 0.388 M 
C) 0.674 M 
D) 1.06 M 
E) 0 M 
A) 0.776 M 
B) 0.388 M 
C) 0.674 M 
D) 1.06 M 
E) 0 M

Question 4

Which of the following compounds is a weak electrolyte?

Accepted Answer

A) HNO3 
B) NaNO3 
C) HNO2 
D) NaNO2 
E) NaOH 
A) HNO3 
B) NaNO3 
C) HNO2 
D) NaNO2 
E) NaOH

Question 5

Identify the Brønsted acid in the following reaction.
NH3 + H2O $\rarr$NH4+ + OH-

Accepted Answer

Question 6

During a titration the following data were collected.A 50.0 mL portion of an HCl solution was titrated with 0.500 M NaOH; 200.mL of the base was required to neutralize the sample.How many grams of HCl are present in 500.mL of this acid solution?

Accepted Answer

The answer of During a titration the following data were...

Question 7

A 4.691 g sample of MgCl2 is dissolved in enough water to give 750.mL of solution.What is the magnesium ion concentration in this solution?

Accepted Answer

A) 3.70 * 10-2 M 
B) 1.05 * 10-2 M 
C) 6.57 * 10-2 M 
D) 4.93 * 10-2 M 
E) 0.131 M 
A) 3.70 * 10-2 M 
B) 1.05 * 10-2 M 
C) 6.57 * 10-2 M 
D) 4.93 * 10-2 M 
E) 0.131 M

Question 8

Identify the reducing agent in the following chemical reaction. Cd + NiO2 + 2H2O $\rarr$Cd(OH)2 + Ni(OH)2

Accepted Answer

A) Cd 
B) NiO2 
C) H2O 
D) Cd(OH)2 
E) Ni(OH)2 
A) Cd 
B) NiO2 
C) H2O 
D) Cd(OH)2 
E) Ni(OH)2

Question 9

Most compounds containing chlorides, bromides, and iodides are soluble except those containing Ag+, Hg22+, and Pb2+.

Accepted Answer

A) True 
 B)False

Question 10

Based on the solubility rules, which of the following will occur if solutions of CuSO4(aq)and BaCl2(aq)are mixed?

Accepted Answer

A) CuCl2 will precipitate; Ba2+ and SO42- are spectator ions. 
B) CuSO4 will precipitate; Ba2+ and Cl- are spectator ions. 
C) BaSO4 will precipitate; Cu2+ and Cl- are spectator ions. 
D) BaCl2 will precipitate; Cu2+ and SO42- are spectator ions. 
E) No precipitate will form. 
A) CuCl2 will precipitate; Ba2+ and SO42- are spectator ions. 
B) CuSO4 will precipitate; Ba2+ and Cl- are spectator ions. 
C) BaSO4 will precipitate; Cu2+ and Cl- are spectator ions. 
D) BaCl2 will precipitate; Cu2+ and SO42- are spectator ions. 
E) No precipitate will form.

Question 11

The highest possible oxidation number of nitrogen is

Accepted Answer

A) +8 
B) +5 
C) +3 
D) +1 
E) -3 
A) +8 
B) +5 
C) +3 
D) +1 
E) -3

Question 12

Identify the following as either a good or poor conductor of electricity: an aqueous solution of Na2SO4.

Accepted Answer

Question 13

Identify the following compound as a strong electrolyte, weak electrolyte, or nonelectrolyte: CH3COOH.

Accepted Answer

Question 14

The oxidation number of Cl in ClO4- is

Accepted Answer

A) -1 
B) +1 
C) +3 
D) +5 
E) None of the above. 
A) -1 
B) +1 
C) +3 
D) +5 
E) None of the above.

Question 15

Which of the following compounds is a nonelectrolyte?

Accepted Answer

A) NaF 
B) HNO3 
C) CH3COOH (acetic acid) 
D) NaOH 
E) C6H12O6 (glucose) 
A) NaF 
B) HNO3 
C) CH3COOH (acetic acid) 
D) NaOH 
E) C6H12O6 (glucose)

Question 16

Identify the oxidizing agent in the following reaction.
2KBr + F2 $\rarr$Br2 + 2KF

Accepted Answer

Question 17

A piece of lead metal was added to an aqueous solution of copper(II)nitrate, and within a few minutes it was observed that the lead turned black and crumbled, and the blue solution characteristic of copper(II)ions faded.(NOTE: Lead forms a 2+ ion when it reacts.)
Write the net ionic equation for this reaction.

Accepted Answer

Pb(s)+ Cu²⁺(

Question 18

Based on the solubility rules, which one of the following compounds should be insoluble in water?

Accepted Answer

A) Na2SO4 
B) BaSO4 
C) CuSO4 
D) MgSO4 
E) Rb2SO4 
A) Na2SO4 
B) BaSO4 
C) CuSO4 
D) MgSO4 
E) Rb2SO4

Question 19

A 3.682 g sample of KClO3 is dissolved in enough water to give 375.mL of solution.What is the chlorate ion concentration in this solution?

Accepted Answer

A) 3.00 * 10-2 M 
B) 4.41 * 10-2 M 
C) 0.118 M 
D) 1.65 * 10-2 M 
E) 8.01 * 10-2 M 
A) 3.00 * 10-2 M 
B) 4.41 * 10-2 M 
C) 0.118 M 
D) 1.65 * 10-2 M 
E) 8.01 * 10-2 M

Question 20

Which of the following represents an acid-base neutralization reaction?

Accepted Answer

A) 2Al(s)+ 3H2SO4(aq)$\rarr$Al2(SO4)3(aq)+ 3H2(g) 
B) SO2(g)+ H2O(l)$\rarr$H2SO3(g) 
C) LiOH(aq)+ HNO3(aq) $\rarr$LiNO3(aq)+ H2O(l) 
D) 2KBr(aq)+ Cl2(g)$\rarr$2KCl(aq)+ Br2(l) 
E) CaBr2(aq)+ H2SO4(aq)$\rarr$ CaSO4(s)+ 2HBr(g) 
A) 2Al(s)+ 3H2SO4(aq)$\rarr$Al2(SO4)3(aq)+ 3H2(g) 
B) SO2(g)+ H2O(l)$\rarr$H2SO3(g) 
C) LiOH(aq)+ HNO3(aq) $\rarr$LiNO3(aq)+ H2O(l) 
D) 2KBr(aq)+ Cl2(g)$\rarr$2KCl(aq)+ Br2(l) 
E) CaBr2(aq)+ H2SO4(aq)$\rarr$ CaSO4(s)+ 2HBr(g)

Exam 4: Reactions in Aqueous Solution

What is the molarity of a solution that contains 5.0 moles of solute in 2.00 liters of solution?

What mass of Na2SO4 is needed to prepare 350.mL of a solution having a sodium ion concentration of 0.125 M?

Zinc dissolves in hydrochloric acid to yield hydrogen gas: Zn(s)+ 2HCl(aq) →\rarr→ ZnCl2(aq)+ H2(g) When a 12.7 g chunk of zinc dissolves in 500.mL of 1.450M HCl, what is the concentration of hydrogen ions remaining in the final solution?

Which of the following compounds is a weak electrolyte?

Identify the Brønsted acid in the following reaction. NH3 + H2O →\rarr→ NH4+ + OH-

During a titration the following data were collected.A 50.0 mL portion of an HCl solution was titrated with 0.500 M NaOH; 200.mL of the base was required to neutralize the sample.How many grams of HCl are present in 500.mL of this acid solution?

A 4.691 g sample of MgCl2 is dissolved in enough water to give 750.mL of solution.What is the magnesium ion concentration in this solution?

Identify the reducing agent in the following chemical reaction. Cd + NiO2 + 2H2O →\rarr→ Cd(OH)2 + Ni(OH)2

Most compounds containing chlorides, bromides, and iodides are soluble except those containing Ag+, Hg22+, and Pb2+.

Based on the solubility rules, which of the following will occur if solutions of CuSO4(aq)and BaCl2(aq)are mixed?

The highest possible oxidation number of nitrogen is

Identify the following as either a good or poor conductor of electricity: an aqueous solution of Na2SO4.

Identify the following compound as a strong electrolyte, weak electrolyte, or nonelectrolyte: CH3COOH.

The oxidation number of Cl in ClO4- is

Which of the following compounds is a nonelectrolyte?

Identify the oxidizing agent in the following reaction. 2KBr + F2 →\rarr→ Br2 + 2KF

Based on the solubility rules, which one of the following compounds should be insoluble in water?

A 3.682 g sample of KClO3 is dissolved in enough water to give 375.mL of solution.What is the chlorate ion concentration in this solution?

Which of the following represents an acid-base neutralization reaction?

Chemistry: The Study of Change

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Mass Relationships in Chemical Reactions

Gases

Thermo-Chemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

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Physical Properties of Solutions

Chemical Kinetics

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Acid-Base Equilibria and Solubility Equilibria

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What mass of Na₂SO₄ is needed to prepare 350.mL of a solution having a sodium ion concentration of 0.125 M?

Zinc dissolves in hydrochloric acid to yield hydrogen gas: Zn(s)+ 2HCl(aq) $\rarr$ ZnCl₂(aq)+ H₂(g) When a 12.7 g chunk of zinc dissolves in 500.mL of 1.450M HCl, what is the concentration of hydrogen ions remaining in the final solution?

Identify the Brønsted acid in the following reaction. NH₃ + H₂O $\rarr$ NH₄⁺ + OH^-

A 4.691 g sample of MgCl₂ is dissolved in enough water to give 750.mL of solution.What is the magnesium ion concentration in this solution?

Identify the reducing agent in the following chemical reaction. Cd + NiO₂ + 2H₂O $\rarr$ Cd(OH)₂ + Ni(OH)₂

Most compounds containing chlorides, bromides, and iodides are soluble except those containing Ag⁺, Hg₂²⁺, and Pb²⁺.

Based on the solubility rules, which of the following will occur if solutions of CuSO₄(aq)and BaCl₂(aq)are mixed?

Identify the following as either a good or poor conductor of electricity: an aqueous solution of Na₂SO₄.

Identify the following compound as a strong electrolyte, weak electrolyte, or nonelectrolyte: CH₃COOH.

The oxidation number of Cl in ClO₄^- is

Identify the oxidizing agent in the following reaction. 2KBr + F₂ $\rarr$ Br₂ + 2KF

A 3.682 g sample of KClO₃ is dissolved in enough water to give 375.mL of solution.What is the chlorate ion concentration in this solution?