Question 1

Morphine is used medicinally as a pain reliever.If an aqueous solution of morphine has [H3O+] = 1.1 × 10-10 M, what is the pH of this solution?

Accepted Answer

A) 1.00 
B) 3.69 
C) 8.96 
D) 9.96 
E) 11 
A) 1.00 
B) 3.69 
C) 8.96 
D) 9.96 
E) 11 D

Question 2

A standard solution is a solution whose concentration is accurately known.

Accepted Answer

A) True 
 B)False  True

Question 3

What term is used to describe the amount of strong acid or strong base that can be added to a buffer solution without significantly changing its pH?

Accepted Answer

A) buffer threshold 
B) Henderson-Hasselbalch strength 
C) conjugate acid-base capacity 
D) buffer capacity 
E) acid dissociation constant 
A) buffer threshold 
B) Henderson-Hasselbalch strength 
C) conjugate acid-base capacity 
D) buffer capacity 
E) acid dissociation constant D

Question 4

A hydronium ion is a protonated water molecule.

Accepted Answer

A) True 
 B)False

Question 5

Strong acids are completely dissociated when dissolved in water.

Accepted Answer

A) True 
 B)False

Question 6

All metal hydroxides are strong bases.

Accepted Answer

A) True 
 B)False

Question 7

The addition of an acid to water increases the [H3O+] and decreases the pH.

Accepted Answer

A) True 
 B)False

Question 8

What is the conjugate base of H2SO4?

Accepted Answer

A) SO42− 
B) HSO4− 
C) H2SO3 
D) SO4− 
E) H2PO4+ 
A) SO42− 
B) HSO4− 
C) H2SO3 
D) SO4− 
E) H2PO4+

Question 9

Which one of the following correctly represents a conjugate acid-base pair?

Accepted Answer

A) H2O, O- 
B) H3O+, OH- 
C) H2CO3, CO32- 
D) HCl, Cl2 
E) H2CO3, HCO3- 
A) H2O, O- 
B) H3O+, OH- 
C) H2CO3, CO32- 
D) HCl, Cl2 
E) H2CO3, HCO3-

Question 10

Nitric acid is a strong acid and dissociates completely when dissolved in water.

Accepted Answer

A) True 
 B)False

Question 11

An aqueous solution with a low pH is necessary for a certain industrial process.Which of the following solutions would have the lowest pH?

Accepted Answer

A) 2.0 M NaOH 
B) 0.5 M HCl 
C) 1.0 M acetic acid 
D) 1.0 M HCl 
E) All solutions would have the same pH. 
A) 2.0 M NaOH 
B) 0.5 M HCl 
C) 1.0 M acetic acid 
D) 1.0 M HCl 
E) All solutions would have the same pH.

Question 12

What is the [OH−] of a solution that has a pH = 10.95?

Accepted Answer

A) 1.03 M 
B) 1.1 × 10-11 M 
C) 8.9 × 10-4 M 
D) 3.05 M 
E) 7.4 × 10-5 M 
A) 1.03 M 
B) 1.1 × 10-11 M 
C) 8.9 × 10-4 M 
D) 3.05 M 
E) 7.4 × 10-5 M

Question 13

Which one of the following is NOT a characteristic property of a base?

Accepted Answer

A) tastes bitter 
B) feels slippery 
C) increases [H+] in water 
D) is corrosive 
E) causes many metal ions to precipitate 
A) tastes bitter 
B) feels slippery 
C) increases [H+] in water 
D) is corrosive 
E) causes many metal ions to precipitate

Question 14

Titration of 15.0 mL of an NaOH solution required 7.4 mL of a 0.25 M KNO3 solution.What is the molarity of the NaOH solution?

Accepted Answer

A) 0.25 M 
B) 0.017 M 
C) 0.12 M 
D) 0.44 M 
E) 0.0019 M 
A) 0.25 M 
B) 0.017 M 
C) 0.12 M 
D) 0.44 M 
E) 0.0019 M

Question 15

The reaction of an acid with a base produces a salt and another product.What is the identity of the other product?

Accepted Answer

A) hydronium ion 
B) water 
C) a buffer 
D) a proton 
E) hydroxide ion 
A) hydronium ion 
B) water 
C) a buffer 
D) a proton 
E) hydroxide ion

Question 16

All buffer solutions operate at a pH at or near 7.

Accepted Answer

A) True 
 B)False

Question 17

Formic acid (HCO2H) is a weak acid found in the venom of bees and ant stings.Which of the following is an accurate statement concerning an aqueous solution of formic acid? HCO2H(aq) + H2O(l)   H3O+(aq) + HCO2−(aq) Ka = 1.8 × 10−4

Accepted Answer

A) The reaction between formic acid and water is slow, due to the low value for Ka. 
B) A formic acid solution predominantly contains undissociated HCO2H molecules. 
C) A formic acid solution predominantly contains H3O+ and HCO2− ions. 
D) A formic acid solution contains a greater concentration of dissolved ions than it does neutral formic acid molecules. 
E) A formic acid solution contains equal amounts of H3O+ and HCO2H. 
A) The reaction between formic acid and water is slow, due to the low value for Ka. 
B) A formic acid solution predominantly contains undissociated HCO2H molecules. 
C) A formic acid solution predominantly contains H3O+ and HCO2− ions. 
D) A formic acid solution contains a greater concentration of dissolved ions than it does neutral formic acid molecules. 
E) A formic acid solution contains equal amounts of H3O+ and HCO2H.

Question 18

A solution containing a buffer has an initial pH of 8.78.If a student adds 5 drops of NaOH(aq) to this solution, what would be a reasonable pH for the resulting solution?

Accepted Answer

A) 7.00 
B) 8.64 
C) 8.78 
D) 8.89 
E) 12.25 
A) 7.00 
B) 8.64 
C) 8.78 
D) 8.89 
E) 12.25

Question 19

The main buffer system found in blood is the HCl/Cl- system.

Accepted Answer

A) True 
 B)False

Question 20

All Brønsted-Lowry acids contain at least one hydrogen atom.

Accepted Answer

A) True 
 B)False

Exam 8: Acids and Bases

Morphine is used medicinally as a pain reliever.If an aqueous solution of morphine has [H3O+] = 1.1 × 10-10 M, what is the pH of this solution?

A standard solution is a solution whose concentration is accurately known.

What term is used to describe the amount of strong acid or strong base that can be added to a buffer solution without significantly changing its pH?

A hydronium ion is a protonated water molecule.

Strong acids are completely dissociated when dissolved in water.

All metal hydroxides are strong bases.

The addition of an acid to water increases the [H3O+] and decreases the pH.

What is the conjugate base of H2SO4?

Which one of the following correctly represents a conjugate acid-base pair?

Nitric acid is a strong acid and dissociates completely when dissolved in water.

An aqueous solution with a low pH is necessary for a certain industrial process.Which of the following solutions would have the lowest pH?

What is the [OH−] of a solution that has a pH = 10.95?

Which one of the following is NOT a characteristic property of a base?

Titration of 15.0 mL of an NaOH solution required 7.4 mL of a 0.25 M KNO3 solution.What is the molarity of the NaOH solution?

The reaction of an acid with a base produces a salt and another product.What is the identity of the other product?

All buffer solutions operate at a pH at or near 7.

Formic acid (HCO2H) is a weak acid found in the venom of bees and ant stings.Which of the following is an accurate statement concerning an aqueous solution of formic acid? HCO2H(aq) + H2O(l) H3O+(aq) + HCO2−(aq) Ka = 1.8 × 10−4

A solution containing a buffer has an initial pH of 8.78.If a student adds 5 drops of NaOH(aq) to this solution, what would be a reasonable pH for the resulting solution?

The main buffer system found in blood is the HCl/Cl- system.

All Brønsted-Lowry acids contain at least one hydrogen atom.

Chemistry:methods and Measurement

The Structure of the Atom and the Periodic Table

Structure and Properties of Ionic and Covalent Compounds

Calculations, Chemical Changes, and the Chemical Equation

States of Matter- Gases, Liquids, and Solids

Solutions

Energy, Rate and Equilibrium

The Nucleus, Radioactivity, and Nuclear Medicine

An Introduction to Organic Chemistry- the Saturated Hydrocarbons

The Unsaturated Hydrocarbons- Alkenes, Alkynes, and Aromatics

Alcohols, Phenols, Thiols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Carboxylic Acid Derivatives

Amines and Amides

Carbohydrates

Lipids and Their Functions in Biochemical Systems

Protein Structure and Function

Enzymes

Introduction to Molecular Genetics

Carbohydrate Metabolism

Aerobic Respiration and Energy Production

Fatty Acid Metabolism

Filters

Morphine is used medicinally as a pain reliever.If an aqueous solution of morphine has [H₃O⁺] = 1.1 × 10^-10 M, what is the pH of this solution?

The addition of an acid to water increases the [H₃O⁺] and decreases the pH.

What is the conjugate base of H₂SO₄?

What is the [OH⁻] of a solution that has a pH = 10.95?

Titration of 15.0 mL of an NaOH solution required 7.4 mL of a 0.25 M KNO₃ solution.What is the molarity of the NaOH solution?

Formic acid (HCO₂H) is a weak acid found in the venom of bees and ant stings.Which of the following is an accurate statement concerning an aqueous solution of formic acid? HCO₂H(aq) + H₂O(l) H₃O⁺(aq) + HCO₂−(aq) K_a = 1.8 × 10⁻⁴

The main buffer system found in blood is the HCl/Cl^- system.