Question 1

Will a 0.1 M solution of NH4NO2(aq)be acidic, basic, or neutral?

Accepted Answer

Question 2

Hard water deposits (calcium carbonate)have built up around your bathroom sink. Which one of these substances would be most effective in dissolving the deposits?

Accepted Answer

A) ammonia 
B) bleach (sodium hypochlorite) 
C) lye (sodium hydroxide) 
D) vinegar (acetic acid) 
A) ammonia 
B) bleach (sodium hypochlorite) 
C) lye (sodium hydroxide) 
D) vinegar (acetic acid)

Question 3

What is the pH of a solution prepared by mixing 50.0 mL of 0.300 M HCl with 450.0 mL of 0.400 M HIO3? [Ka(HIO3)= 1.6 * 10-1]

Accepted Answer

A) 1.52 
B) 0.80 
C) 0.72 
D) 0.89 
E) 0.66 
A) 1.52 
B) 0.80 
C) 0.72 
D) 0.89 
E) 0.66

Question 4

Of the two acids HBr and H2Se, H2Se is the stronger acid.

Accepted Answer

A) True 
 B)False

Question 5

Consider the weak acid CH3COOH (acetic acid). If a 0.048 M CH3COOH solution is 5.2% ionized, determine the [H3O+] concentration at equilibrium.

Accepted Answer

A) 0.25 M 
B) 9.2 * 10-3 M 
C) 0.048 M 
D) 0.052 M 
E) 2.5 * 10-3 M 
A) 0.25 M 
B) 9.2 * 10-3 M 
C) 0.048 M 
D) 0.052 M 
E) 2.5 * 10-3 M

Question 6

Write the chemical formula for the acid formed when Cl2O5 is dissolved in water.

Accepted Answer

Question 7

A solution with a pH of 8 has a hydrogen ion concentration [H+] that is 30 times greater than that of a solution of pH 11.

Accepted Answer

A) True 
 B)False

Question 8

The pH of a Ba(OH)2 solution is 10.00. What is the H+ ion concentration of this solution?

Accepted Answer

A) 4.0 * 10-11 M 
B) 1.6 * 10-10 M 
C) 1.3 * 10-5 M 
D) 1.0 * 10-10 M 
E) 10. M 
A) 4.0 * 10-11 M 
B) 1.6 * 10-10 M 
C) 1.3 * 10-5 M 
D) 1.0 * 10-10 M 
E) 10. M

Question 9

Identify the conjugate acid of CO32- in the reaction CO32- + H2PO4- $\rarr$HCO3- + HPO42-

Accepted Answer

A) H2CO3 
B) HCO3- 
C) H2O 
D) HPO42- 
E) H2PO4- 
A) H2CO3 
B) HCO3- 
C) H2O 
D) HPO42- 
E) H2PO4-

Question 10

Identify the conjugate base of HPO42- in the reaction HCO3- + HPO42- $\rarr$ H2CO3 + PO43-

Accepted Answer

A) H2O 
B) HCO3- 
C) H2CO3 
D) PO43- 
E) None of these. 
A) H2O 
B) HCO3- 
C) H2CO3 
D) PO43- 
E) None of these.

Question 11

Which of these lists of molecules is arranged in order of increasing acid strength: HI, H2Te, H3Sb.

Accepted Answer

A) H2Te 3Sb 2Te 3Sb 
C) HI 3Sb 2Te 
D) H3Sb 2Te 3Sb 2Te 
A) H2Te 3Sb 2Te 3Sb 
C) HI 3Sb 2Te 
D) H3Sb 2Te 3Sb 2Te

Question 12

Which of these acids is stronger, H3AsO3 or H3AsO4?

Accepted Answer

Question 13

Calculate the concentration of oxalate ion (C2O42-)in a 0.175 M solution of oxalic acid (C2H2O4). [For oxalic acid, Ka1 = 6.5 * 10-2, Ka2 = 6.1 * 10-5.]

Accepted Answer

A) 0.11 M 
B) 6.1 * 10-5 M 
C) 4.0 * 10-6 M 
D) 0.0791 M 
E) 0.175 M 
A) 0.11 M 
B) 6.1 * 10-5 M 
C) 4.0 * 10-6 M 
D) 0.0791 M 
E) 0.175 M

Question 14

Morphine, C17H19NO3, is often used to control severe post-operative pain. What is the pH of the solution made by dissolving 25.0 mg of morphine in 100. mL of water? (For morphine, Kb = 1.62 * 10-6.)

Accepted Answer

A) 9.57 
B) 9.08 
C) 3.79 
D) 9.87 
E) 4.43 
A) 9.57 
B) 9.08 
C) 3.79 
D) 9.87 
E) 4.43

Question 15

When 2.0 * 10-2 mole of nicotinic acid (a monoprotic acid)is dissolved in 350. mL of water, the pH is 3.05. What is the Ka of nicotinic acid?

Accepted Answer

1.4 * 10<s

Question 16

The compound CH3NH2 reacts with water to form CH3NH3+ and OH-. What role does CH3NH2 play in this reaction?

Accepted Answer

Question 17

What is the OH- ion concentration in a 5.2 * 10-4 M HNO3 solution?

Accepted Answer

A) 1.9 * 10-11 M 
B) 1.0 * 10-7 M 
C) 5.2 * 10-4 M 
D) zero 
E) 1.0 * 10-4 M 
A) 1.9 * 10-11 M 
B) 1.0 * 10-7 M 
C) 5.2 * 10-4 M 
D) zero 
E) 1.0 * 10-4 M

Question 18

Calculate the H+ ion concentration in a 8.8 * 10-4 M Ca(OH)2 solution.

Accepted Answer

A) 8.8 * 10-4 M 
B) 1.8 * 10-3 M 
C) 2.2 * 10-11 M 
D) 1.1 * 10-11 M 
E) 5.7 * 10-12 M 
A) 8.8 * 10-4 M 
B) 1.8 * 10-3 M 
C) 2.2 * 10-11 M 
D) 1.1 * 10-11 M 
E) 5.7 * 10-12 M

Question 19

The pH of coffee is approximately 5.0. How many times greater is the [H+] in coffee than in neutral water?

Accepted Answer

A) 200 
B) 100 
C) 5.0 
D) 1.4 
E) 0.01 
A) 200 
B) 100 
C) 5.0 
D) 1.4 
E) 0.01

Question 20

Lime is used in farming to reduce the acidity of the soil. The chemical name for lime is calcium oxide. When water in the soil reacts with lime, what base is formed?

Accepted Answer

The answer of Lime is used in farming to reduce...

Exam 16: Acids and Bases

Will a 0.1 M solution of NH4NO2(aq)be acidic, basic, or neutral?

Hard water deposits (calcium carbonate)have built up around your bathroom sink. Which one of these substances would be most effective in dissolving the deposits?

What is the pH of a solution prepared by mixing 50.0 mL of 0.300 M HCl with 450.0 mL of 0.400 M HIO3? [Ka(HIO3)= 1.6 * 10-1]

Of the two acids HBr and H2Se, H2Se is the stronger acid.

Consider the weak acid CH3COOH (acetic acid). If a 0.048 M CH3COOH solution is 5.2% ionized, determine the [H3O+] concentration at equilibrium.

Write the chemical formula for the acid formed when Cl2O5 is dissolved in water.

A solution with a pH of 8 has a hydrogen ion concentration [H+] that is 30 times greater than that of a solution of pH 11.

The pH of a Ba(OH)2 solution is 10.00. What is the H+ ion concentration of this solution?

Identify the conjugate acid of CO32- in the reaction CO32- + H2PO4- →\rarr→ HCO3- + HPO42-

Identify the conjugate base of HPO42- in the reaction HCO3- + HPO42- →\rarr→ H2CO3 + PO43-

Which of these lists of molecules is arranged in order of increasing acid strength: HI, H2Te, H3Sb.

Which of these acids is stronger, H3AsO3 or H3AsO4?

Calculate the concentration of oxalate ion (C2O42-)in a 0.175 M solution of oxalic acid (C2H2O4). [For oxalic acid, Ka1 = 6.5 * 10-2, Ka2 = 6.1 * 10-5.]

Morphine, C17H19NO3, is often used to control severe post-operative pain. What is the pH of the solution made by dissolving 25.0 mg of morphine in 100. mL of water? (For morphine, Kb = 1.62 * 10-6.)

When 2.0 * 10-2 mole of nicotinic acid (a monoprotic acid)is dissolved in 350. mL of water, the pH is 3.05. What is the Ka of nicotinic acid?

The compound CH3NH2 reacts with water to form CH3NH3+ and OH-. What role does CH3NH2 play in this reaction?

What is the OH- ion concentration in a 5.2 * 10-4 M HNO3 solution?

Calculate the H+ ion concentration in a 8.8 * 10-4 M Ca(OH)2 solution.

The pH of coffee is approximately 5.0. How many times greater is the [H+] in coffee than in neutral water?

Lime is used in farming to reduce the acidity of the soil. The chemical name for lime is calcium oxide. When water in the soil reacts with lime, what base is formed?

Introduction

Atoms, Molecules, and Ions

Stoichiometry

Reactions in Aqueous Solution

Gases

Energy Relationships in Chemical Reactions

The Electronic Structure of Atoms

The Periodic Table

Chemical Bonding I: the Covalent Bond

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Introduction to Organic Chemistry

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria and Solubility Equilibria

Thermodynamics

Redox Reactions and Electrochemistry

The Chemistry of Coordination Compounds

Nuclear Chemistry

Organic Polymerssynthetic and Natural

Filters

Will a 0.1 M solution of NH₄NO₂(aq)be acidic, basic, or neutral?

What is the pH of a solution prepared by mixing 50.0 mL of 0.300 M HCl with 450.0 mL of 0.400 M HIO₃? [K_a(HIO₃)= 1.6 * 10^-1]

Of the two acids HBr and H₂Se, H₂Se is the stronger acid.

Consider the weak acid CH₃COOH (acetic acid). If a 0.048 M CH₃COOH solution is 5.2% ionized, determine the [H₃O⁺] concentration at equilibrium.

Write the chemical formula for the acid formed when Cl₂O₅ is dissolved in water.

A solution with a pH of 8 has a hydrogen ion concentration [H⁺] that is 30 times greater than that of a solution of pH 11.

The pH of a Ba(OH)₂ solution is 10.00. What is the H⁺ ion concentration of this solution?

Identify the conjugate acid of CO₃^2- in the reaction CO₃^2- + H₂PO₄^- $\rarr$ HCO₃^- + HPO₄^2-

Identify the conjugate base of HPO₄^2- in the reaction HCO₃^- + HPO₄^2- $\rarr$ H₂CO₃ + PO₄^3-

Which of these lists of molecules is arranged in order of increasing acid strength: HI, H₂Te, H₃Sb.

Which of these acids is stronger, H₃AsO₃ or H₃AsO₄?

Calculate the concentration of oxalate ion (C₂O₄^2-)in a 0.175 M solution of oxalic acid (C₂H₂O₄). [For oxalic acid, K_a1 = 6.5 * 10^-2, K_a2 = 6.1 * 10^-5.]

Morphine, C₁₇H₁₉NO₃, is often used to control severe post-operative pain. What is the pH of the solution made by dissolving 25.0 mg of morphine in 100. mL of water? (For morphine, K_b = 1.62 * 10^-6.)

When 2.0 * 10^-2 mole of nicotinic acid (a monoprotic acid)is dissolved in 350. mL of water, the pH is 3.05. What is the K_a of nicotinic acid?

The compound CH₃NH₂ reacts with water to form CH₃NH₃⁺ and OH^-. What role does CH₃NH₂ play in this reaction?

What is the OH^- ion concentration in a 5.2 * 10^-4 M HNO₃ solution?

Calculate the H⁺ ion concentration in a 8.8 * 10^-4 M Ca(OH)₂ solution.

The pH of coffee is approximately 5.0. How many times greater is the [H⁺] in coffee than in neutral water?