Question 1

The [-OH] in a sample of egg whites is 6.3 × 10-7 M. What is the [H3O+] in these egg whites?

Accepted Answer

A) 6.3 × 10-7 M H3O+ 
B) 1.0 × 10-7 M H3O+ 
C) 6.3 × 10-21 M H3O+ 
D) 1.6 × 10-8 M H3O+ 
E) 1.0 × 10-14 M H3O+ 
A) 6.3 × 10-7 M H3O+ 
B) 1.0 × 10-7 M H3O+ 
C) 6.3 × 10-21 M H3O+ 
D) 1.6 × 10-8 M H3O+ 
E) 1.0 × 10-14 M H3O+

Question 2

What is the molarity of an HCl solution if 43.6 mL of a 0.125 M KOH solution are needed to titrate a 25.0 mL sample of the acid according to the equation below? KOH(aq)+ HCl(aq)$\rightarrow$H2O(l)+ KCl(aq)

Accepted Answer

A) 0.218 M HCl 
B) 0.573 M HCl 
C) 0.0717 M HCl 
D) 4.58 M HCl 
E) 1.74 M HCl 
A) 0.218 M HCl 
B) 0.573 M HCl 
C) 0.0717 M HCl 
D) 4.58 M HCl 
E) 1.74 M HCl

Question 3

In an acid-base reaction, a proton is transferred from the acid (HA)to the base (B:).

Accepted Answer

A) True 
 B)False

Question 4

All salts where the anion is derived from a strong acid form basic solutions.

Accepted Answer

A) True 
 B)False

Question 5

A strong acid readily donates a proton, forming a (strong/weak)_____ conjugate base.

Accepted Answer

The answer of A strong acid readily donates a proton,...

Question 6

Which species can act as a Brønsted-Lowry base?

Accepted Answer

A) CO32- 
B) HBr 
C) H2CO3 
D) NH4+ 
A) CO32- 
B) HBr 
C) H2CO3 
D) NH4+

Question 7

A sample of urine has a pH of 8.2. Which statement describing the urine sample is NOT true?

Accepted Answer

A) The urine sample is basic. 
B) The urine sample has a hydronium ion concentration greater than that of a neutral solution. 
C) The urine sample has a hydroxide ion concentration greater than its hydronium ion concentration. 
D) The urine sample has a hydroxide ion concentration greater than 1.0 × 10-7. 
A) The urine sample is basic. 
B) The urine sample has a hydronium ion concentration greater than that of a neutral solution. 
C) The urine sample has a hydroxide ion concentration greater than its hydronium ion concentration. 
D) The urine sample has a hydroxide ion concentration greater than 1.0 × 10-7.

Question 8

What is the molarity of an HNO3 solution if 24.1 mL of a 0.250 M Ba(OH)2 solution are needed to titrate a 15.0 mL sample of the acid according to the equation below? Ba(OH)2(aq)+ 2 HNO3(aq)   2 H2O(l)+ Ba(NO3)2(aq)

Accepted Answer

A) 0.402 M HNO3 
B) 0.156 M HNO3 
C) 0.311 M HNO3 
D) 0.201 M HNO3 
E) 0.803 M HNO3 
A) 0.402 M HNO3 
B) 0.156 M HNO3 
C) 0.311 M HNO3 
D) 0.201 M HNO3 
E) 0.803 M HNO3

Question 9

Ions that appear on both sides of an equation but undergo no change in a reaction are called _____ ions.

Accepted Answer

The answer of Ions that appear on both sides of...

Question 10

What is the net ionic equation for the acid-base reaction of hydrobromic acid with sodium hydroxide?

Accepted Answer

A) NaOH(aq)+ HBr(aq)$\rightarrow$ H2O(l)+ NaBr(aq) 
B) Na+(aq)+ -OH(aq)+ H+(aq)+ Br-(aq)$\rightarrow$H2O(l)+ Na+(aq)+ Br-(aq) 
C) Na+(aq)+ -OH(aq)+ H+(aq)+ Br-(aq)$\rightarrow$ H+(aq)+ -OH(aq)+ Na+(aq)+ Br-(aq) 
D) -OH(aq)+ H+(aq)$\rightarrow$ H2O(l) 
A) NaOH(aq)+ HBr(aq)$\rightarrow$ H2O(l)+ NaBr(aq) 
B) Na+(aq)+ -OH(aq)+ H+(aq)+ Br-(aq)$\rightarrow$H2O(l)+ Na+(aq)+ Br-(aq) 
C) Na+(aq)+ -OH(aq)+ H+(aq)+ Br-(aq)$\rightarrow$ H+(aq)+ -OH(aq)+ Na+(aq)+ Br-(aq) 
D) -OH(aq)+ H+(aq)$\rightarrow$ H2O(l)

Question 11

Two species that differ by the presence of a proton are called a conjugate acid-base pair.

Accepted Answer

A) True 
 B)False

Question 12

An aqueous solution of KCl has a lower pH than an aqueous solution of Li2SO3.

Accepted Answer

A) True 
 B)False

Question 13

A salt derived from a strong base and a weak acid forms an acidic solution.

Accepted Answer

A) True 
 B)False

Question 14

Which acid has the strongest conjugate base?

Accepted Answer

A) Hydrogen sulfate ion HSO4- (Ka = 1.2 × 10-2) 
B) Hydrocyanic acid HCN (Ka = 4.9 × 10-10) 
C) Hydrofluoric acid HF (Ka = 7.2 × 10-4) 
D) Ammonium ion NH4+ (Ka = 5.6 × 10-10) 
A) Hydrogen sulfate ion HSO4- (Ka = 1.2 × 10-2) 
B) Hydrocyanic acid HCN (Ka = 4.9 × 10-10) 
C) Hydrofluoric acid HF (Ka = 7.2 × 10-4) 
D) Ammonium ion NH4+ (Ka = 5.6 × 10-10)

Question 15

A solution containing a low concentration HCl is a weak acid.

Accepted Answer

A) True 
 B)False

Question 16

A Brønsted-Lowry acid is

Accepted Answer

A) a compound that contains hydroxide and dissolves in water to form OH-. 
B) a compound that is a proton donor. 
C) a compound that is a proton acceptor. 
D) a compound that contains a hydrogen atom and dissolves in water to form a hydrogen ion, H+. 
A) a compound that contains hydroxide and dissolves in water to form OH-. 
B) a compound that is a proton donor. 
C) a compound that is a proton acceptor. 
D) a compound that contains a hydrogen atom and dissolves in water to form a hydrogen ion, H+.

Question 17

Although a Brønsted-Lowry acid must contain a hydrogen atom, it may be a neutral molecule or contain a net positive or negative charge.

Accepted Answer

A) True 
 B)False

Question 18

In the acid-base reaction: HCN(aq)+ F-(aq)   CN-(aq)+ HF(aq), where Ka (HCN)= 4.9 × 10-10 and Ka (HF)= 7.2 × 10-4, the

Accepted Answer

A) products are favored. 
B) reactants are favored. 
A) products are favored. 
B) reactants are favored.

Question 19

The pH of normal blood is 7.4. The pH of a diabetic's blood was determined to be 6.4. Which comparison of these two blood samples is accurate?

Accepted Answer

A) The diabetic's blood has a lower [H3O+] than normal blood. 
B) The diabetic's blood is more acidic than normal blood. 
C) Normal blood has a lower [OH-] than the diabetic's blood. 
D) Normal blood has a higher [H3O+] than the diabetic's blood. 
A) The diabetic's blood has a lower [H3O+] than normal blood. 
B) The diabetic's blood is more acidic than normal blood. 
C) Normal blood has a lower [OH-] than the diabetic's blood. 
D) Normal blood has a higher [H3O+] than the diabetic's blood.

Question 20

Most acids are weak acids.

Accepted Answer

A) True 
 B)False

Exam 9: Acids and Bases

The [-OH] in a sample of egg whites is 6.3 × 10-7 M. What is the [H3O+] in these egg whites?

What is the molarity of an HCl solution if 43.6 mL of a 0.125 M KOH solution are needed to titrate a 25.0 mL sample of the acid according to the equation below? KOH(aq)+ HCl(aq) →\rightarrow→ H2O(l)+ KCl(aq)

In an acid-base reaction, a proton is transferred from the acid (HA)to the base (B:).

All salts where the anion is derived from a strong acid form basic solutions.

A strong acid readily donates a proton, forming a (strong/weak)_____ conjugate base.

Which species can act as a Brønsted-Lowry base?

A sample of urine has a pH of 8.2. Which statement describing the urine sample is NOT true?

What is the molarity of an HNO3 solution if 24.1 mL of a 0.250 M Ba(OH)2 solution are needed to titrate a 15.0 mL sample of the acid according to the equation below? Ba(OH)2(aq)+ 2 HNO3(aq) 2 H2O(l)+ Ba(NO3)2(aq)

Ions that appear on both sides of an equation but undergo no change in a reaction are called _____ ions.

What is the net ionic equation for the acid-base reaction of hydrobromic acid with sodium hydroxide?

Two species that differ by the presence of a proton are called a conjugate acid-base pair.

An aqueous solution of KCl has a lower pH than an aqueous solution of Li2SO3.

A salt derived from a strong base and a weak acid forms an acidic solution.

Which acid has the strongest conjugate base?

A solution containing a low concentration HCl is a weak acid.

A Brønsted-Lowry acid is

Although a Brønsted-Lowry acid must contain a hydrogen atom, it may be a neutral molecule or contain a net positive or negative charge.

In the acid-base reaction: HCN(aq)+ F-(aq) CN-(aq)+ HF(aq), where Ka (HCN)= 4.9 × 10-10 and Ka (HF)= 7.2 × 10-4, the

The pH of normal blood is 7.4. The pH of a diabetic's blood was determined to be 6.4. Which comparison of these two blood samples is accurate?

Most acids are weak acids.

Matter and Measurement

Atoms and the Periodic Table

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Chemical Reactions

Energy Changes, Reaction Rates, and Equilibrium

Gases, Liquids, and Solids

Solutions

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

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Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen, Halogen, or Sulfur

The Three-Dimensional Shape of Molecules

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Amines and Neurotransmitters

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Filters

The [^-OH] in a sample of egg whites is 6.3 × 10^-7M. What is the [H₃O⁺] in these egg whites?

What is the molarity of an HCl solution if 43.6 mL of a 0.125 M KOH solution are needed to titrate a 25.0 mL sample of the acid according to the equation below? KOH(aq)+ HCl(aq) $\rightarrow$ H₂O(l)+ KCl(aq)

What is the molarity of an HNO₃ solution if 24.1 mL of a 0.250 M Ba(OH)₂ solution are needed to titrate a 15.0 mL sample of the acid according to the equation below? Ba(OH)₂(aq)+ 2 HNO₃(aq) 2 H₂O(l)+ Ba(NO₃)₂(aq)

An aqueous solution of KCl has a lower pH than an aqueous solution of Li₂SO₃.

In the acid-base reaction: HCN(aq)+ F^-(aq) CN^-(aq)+ HF(aq), where K_a (HCN)= 4.9 × 10^-10 and K_a (HF)= 7.2 × 10^-4, the