Question 1

What is the conjugate base of water?

Accepted Answer

A) H2O (l) 
B) H3O+ (aq) 
C) OH- (aq) 
D) H+ (aq) 
E) O2- (aq) 
A) H2O (l) 
B) H3O+ (aq) 
C) OH- (aq) 
D) H+ (aq) 
E) O2- (aq)

Question 2

Acetic acid is a weak acid in water because it is

Accepted Answer

A) dilute. 
B) only slightly soluble. 
C) unable to hold onto its hydrogen ion. 
D) only slightly dissociated into ions. 
E) completely dissociated into hydronium ions and acetate ions. 
A) dilute. 
B) only slightly soluble. 
C) unable to hold onto its hydrogen ion. 
D) only slightly dissociated into ions. 
E) completely dissociated into hydronium ions and acetate ions.

Question 3

If the [H+] of a water sample is 1 × 10-4 M,the [OH-] is

Accepted Answer

A) 1 × 10-4 M. 
B) 1 × 10-14 M. 
C) 1 × 104 M. 
D) 1 × 10-10 M. 
E) none of the above 
A) 1 × 10-4 M. 
B) 1 × 10-14 M. 
C) 1 × 104 M. 
D) 1 × 10-10 M. 
E) none of the above

Question 4

The [OH-] and the pH of 0.035 M KOH at 25°C are,respectively,

Accepted Answer

A) 0.035 M and +1.46. 
B) 0.035 M and -1.46. 
C) 2.9 × 10-13 M and -12.54. 
D) 0.035 and +12.54. 
E) 2.9 × 10-13 M and +12.54. 
A) 0.035 M and +1.46. 
B) 0.035 M and -1.46. 
C) 2.9 × 10-13 M and -12.54. 
D) 0.035 and +12.54. 
E) 2.9 × 10-13 M and +12.54.

Question 5

The net ionic equation for the reaction of formic acid,a weak acid,with potassium hydroxide,a strong base,is:

Accepted Answer

A) HCO2H (aq)+ KOH (aq)→ KHCO2 (aq)+ H2O (l) 
B) HCO2H (aq)+ K+ (aq)+ OH- (aq)→ K+ (aq)+ HCO2- (aq)+ H2O (l) 
C) HCO2H (aq)+ OH- (aq)→ HCO2- (aq)+ H2O (l) 
D) HCO2- (aq)+ KOH (aq)→ KHCO2 (aq)+ OH- (aq) 
E) H+ (aq)+ HCO2- (aq)+ K+ (aq)+ OH- (aq)→ K+ (aq)+ HCO2- (aq)+ H2O (l) 
A) HCO2H (aq)+ KOH (aq)→ KHCO2 (aq)+ H2O (l) 
B) HCO2H (aq)+ K+ (aq)+ OH- (aq)→ K+ (aq)+ HCO2- (aq)+ H2O (l) 
C) HCO2H (aq)+ OH- (aq)→ HCO2- (aq)+ H2O (l) 
D) HCO2- (aq)+ KOH (aq)→ KHCO2 (aq)+ OH- (aq) 
E) H+ (aq)+ HCO2- (aq)+ K+ (aq)+ OH- (aq)→ K+ (aq)+ HCO2- (aq)+ H2O (l)

Question 6

In an aqueous solution that is basic,[H3O+] is ________ than 1.0 × 10-7 and ________ than [OH-].

Accepted Answer

A) greater; less 
B) less; greater 
C) greater; greater 
D) less; less 
E) none of the above 
A) greater; less 
B) less; greater 
C) greater; greater 
D) less; less 
E) none of the above

Question 7

Which of the following compounds is a salt?

Accepted Answer

A) HBr 
B) KNO3 
C) H2SO4 
D) NaOH 
E) C6H12O6 
A) HBr 
B) KNO3 
C) H2SO4 
D) NaOH 
E) C6H12O6

Question 8

The pH of a 250.mL sample of a buffer solution is 9.85.If 1.0 mL of 6 M HCl is added,the pH of the resulting mixture is closest to ________.

Accepted Answer

A) 0.00 
B) 1.65 
C) 7.00 
D) 9.70 
E) 10.00 
A) 0.00 
B) 1.65 
C) 7.00 
D) 9.70 
E) 10.00

Question 9

Match the following.
-amphoteric

Accepted Answer

A) an acid-base theory that bases reactions on hydrogen and hydroxide ions 
B) the species that results when a base accepts a proton 
C) a substance which can behave as either an acid or a base 
D) the species that results when an acid donates a proton 
E) a theory that treats acid-base reactions as proton-transfer reactions 
A) an acid-base theory that bases reactions on hydrogen and hydroxide ions 
B) the species that results when a base accepts a proton 
C) a substance which can behave as either an acid or a base 
D) the species that results when an acid donates a proton 
E) a theory that treats acid-base reactions as proton-transfer reactions

Question 10

Which of the following solutions is a buffer?

Accepted Answer

A) a solution of acetic acid and sodium acetate 
B) a solution of acetic acid and sodium sulfate 
C) a solution of hydrochloric acid and sodium sulfate 
D) a solution of hydrochloric acid and sodium acetate 
E) a solution of sulfuric acid and sodium sulfate 
A) a solution of acetic acid and sodium acetate 
B) a solution of acetic acid and sodium sulfate 
C) a solution of hydrochloric acid and sodium sulfate 
D) a solution of hydrochloric acid and sodium acetate 
E) a solution of sulfuric acid and sodium sulfate

Question 11

Which compound produces a basic solution when dissolved in water?

Accepted Answer

A) NH4Cl 
B) NaF 
C) KClO4 
D) KCl 
E) Ca(NO3)2 
A) NH4Cl 
B) NaF 
C) KClO4 
D) KCl 
E) Ca(NO3)2

Question 12

How many mL of 0.360 M HNO3 are needed to neutralize a 22.5 mL sample of 0.240 M KOH?

Accepted Answer

A) 5.40 mL 
B) 15.0 mL 
C) 22.5 mL 
D) 33.8 mL 
E) 62.5 mL 
A) 5.40 mL 
B) 15.0 mL 
C) 22.5 mL 
D) 33.8 mL 
E) 62.5 mL

Question 13

What is the normality of a solution prepared by dissolving 37.5 g citric acid,a triprotic acid with molar mass of 192.14 g,in water to make 250.mL solution?

Accepted Answer

A) 2.34 N 
B) 0.780 N 
C) 0.147 N 
D) 0.0865 N 
E) 0.288 N 
A) 2.34 N 
B) 0.780 N 
C) 0.147 N 
D) 0.0865 N 
E) 0.288 N

Question 14

A necessary requirement for a Brønsted base is

Accepted Answer

A) the presence of water as a reaction medium. 
B) the presence of hydroxide in its formula. 
C) a lone pair of electrons in its Lewis dot structure. 
D) the production of hydronium ion upon reaction with water. 
E) the presence of a metal ion in its formula. 
A) the presence of water as a reaction medium. 
B) the presence of hydroxide in its formula. 
C) a lone pair of electrons in its Lewis dot structure. 
D) the production of hydronium ion upon reaction with water. 
E) the presence of a metal ion in its formula.

Question 15

Of the following four substances,which would form a basic solution when dissolved in water:
NH4Cl Cu(NO3)2 K2CO3 NaF

Accepted Answer

A) NH4Cl,Cu(NO3)2 
B) K2CO3,NH4Cl 
C) NaF,K2CO3 
D) NaF only 
E) none of them 
A) NH4Cl,Cu(NO3)2 
B) K2CO3,NH4Cl 
C) NaF,K2CO3 
D) NaF only 
E) none of them

Question 16

What is the [H3O+] in a solution with pH = 11.61?

Accepted Answer

A) 1.16 × 10+1 M 
B) 2.39 × 10+1 M 
C) 4.07 × 10-3 M 
D) 1.00 × 10-14 M 
E) 2.45 × 10-12 M 
A) 1.16 × 10+1 M 
B) 2.39 × 10+1 M 
C) 4.07 × 10-3 M 
D) 1.00 × 10-14 M 
E) 2.45 × 10-12 M

Question 17

Match the following.
-Bronsted-Lowry theory

Accepted Answer

A) an acid-base theory that bases reactions on hydrogen and hydroxide ions 
B) the species that results when a base accepts a proton 
C) a substance which can behave as either an acid or a base 
D) the species that results when an acid donates a proton 
E) a theory that treats acid-base reactions as proton-transfer reactions 
A) an acid-base theory that bases reactions on hydrogen and hydroxide ions 
B) the species that results when a base accepts a proton 
C) a substance which can behave as either an acid or a base 
D) the species that results when an acid donates a proton 
E) a theory that treats acid-base reactions as proton-transfer reactions

Question 18

If the concentration of H3O+ in an aqueous solution is 7.6 × 10-9 M,the concentration of OH- is ________.

Accepted Answer

A) 7.6 × 10-23 M 
B) 1.3 × 10+8 M 
C) 6.4 × 10-5 M 
D) 1.3 × 10-6 M 
E) 7.6 × 10-9 M 
A) 7.6 × 10-23 M 
B) 1.3 × 10+8 M 
C) 6.4 × 10-5 M 
D) 1.3 × 10-6 M 
E) 7.6 × 10-9 M

Question 19

What is the pH of a solution in which [H3O+] = 1.2 × 10-3 M?

Accepted Answer

A) 1.20 
B) 2.92 
C) 11.08 
D) 12.80 
E) 8.33 × 10-12 
A) 1.20 
B) 2.92 
C) 11.08 
D) 12.80 
E) 8.33 × 10-12

Question 20

Which of these,if dissolved in 1.0 L of pure water,would produce a buffer solution?

Accepted Answer

A) 0.1 mol NaCl + 0.1 mol KCl 
B) 0.1 mol H3O+ + 0.1 OH- 
C) 0.1 mol NaH2PO4 + 0.1 mol Na2HPO4 
D) 0.1 mol HCl + 0.1 mol NaOH 
E) 0.1 mol H3O+ + 0.1 mol Cl- 
A) 0.1 mol NaCl + 0.1 mol KCl 
B) 0.1 mol H3O+ + 0.1 OH- 
C) 0.1 mol NaH2PO4 + 0.1 mol Na2HPO4 
D) 0.1 mol HCl + 0.1 mol NaOH 
E) 0.1 mol H3O+ + 0.1 mol Cl-

Exam 10: Acids and Bases

What is the conjugate base of water?

Acetic acid is a weak acid in water because it is

If the [H+] of a water sample is 1 × 10-4 M,the [OH-] is

The [OH-] and the pH of 0.035 M KOH at 25°C are,respectively,

The net ionic equation for the reaction of formic acid,a weak acid,with potassium hydroxide,a strong base,is:

In an aqueous solution that is basic,[H3O+] is ________ than 1.0 × 10-7 and ________ than [OH-].

Which of the following compounds is a salt?

The pH of a 250.mL sample of a buffer solution is 9.85.If 1.0 mL of 6 M HCl is added,the pH of the resulting mixture is closest to ________.

Match the following. -amphoteric

Which of the following solutions is a buffer?

Which compound produces a basic solution when dissolved in water?

How many mL of 0.360 M HNO3 are needed to neutralize a 22.5 mL sample of 0.240 M KOH?

What is the normality of a solution prepared by dissolving 37.5 g citric acid,a triprotic acid with molar mass of 192.14 g,in water to make 250.mL solution?

A necessary requirement for a Brønsted base is

Of the following four substances,which would form a basic solution when dissolved in water: NH4Cl Cu(NO3)2 K2CO3 NaF

What is the [H3O+] in a solution with pH = 11.61?

Match the following. -Bronsted-Lowry theory

If the concentration of H3O+ in an aqueous solution is 7.6 × 10-9 M,the concentration of OH- is ________.

What is the pH of a solution in which [H3O+] = 1.2 × 10-3 M?

Which of these,if dissolved in 1.0 L of pure water,would produce a buffer solution?

Matter and Measurements

Atoms and the Periodic Table

Ionic Compounds

Molecular Compounds

Classification and Balancing of Chemical Reactions

Chemical Reactions: Mole and Mass Relationships

Chemical Reactions: Energy, rates, and Equilibrium

Gases, liquids, and Solids

Solutions

Nuclear Chemistry

Introduction to Organic Chemistry: Alkanes

Alkenes, alkynes, and Aromatic Compounds

Some Compounds With Oxygen, sulfur, or a Halogen

Amines

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

The Generation of Biochemical Energy

Carbohydrates

Carbohydrate Metabolism

Lipids

Lipid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Protein and Amino Acid Metabolism

Chemical Messengers: Hormones, neurotransmitters, and Drugs

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Filters

If the [H⁺] of a water sample is 1 × 10^-4 M,the [OH^-] is

The [OH^-] and the pH of 0.035 M KOH at 25°C are,respectively,

In an aqueous solution that is basic,[H₃O⁺] is than 1.0 × 10^-7 and than [OH^-].

How many mL of 0.360 M HNO₃ are needed to neutralize a 22.5 mL sample of 0.240 M KOH?

Of the following four substances,which would form a basic solution when dissolved in water: NH₄Cl Cu(NO₃)₂ K₂CO₃ NaF

What is the [H₃O⁺] in a solution with pH = 11.61?

If the concentration of H₃O⁺ in an aqueous solution is 7.6 × 10^-9 M,the concentration of OH^- is ________.

What is the pH of a solution in which [H₃O⁺] = 1.2 × 10^-3 M?