Question 1

Write the chemical formula for phosphoric acid.

Accepted Answer

The answer of Write the chemical formula for phosphoric acid....

Question 2

Acid strength decreases in the series: HNO3 > HF > CH3COOH. Which of these species is the strongest base?

Accepted Answer

A) NO3- 
B) CH3COO- 
C) F- 
D) CH3COOH 
A) NO3- 
B) CH3COO- 
C) F- 
D) CH3COOH

Question 3

An aqueous solution of KCl would be

Accepted Answer

A) neutral 
B) basic 
C) acidic 
A) neutral 
B) basic 
C) acidic

Question 4

The equilibrium constant for the reaction C6H5COOH(aq)+ CH3COO-(aq)   C6H5COO-(aq)+ CH3COOH(aq)
Is 3.6 at 25°C. If Ka for CH3COOH is 1.8 * 10-5, what is the acid dissociation constant for C6H5COOH?

Accepted Answer

A) 5.0 * 10-6 
B) 6.5 * 10-5 
C) 2.3 * 10-4 
D) 8.3 * 10-5 
E) 5.6 * 10-6 
A) 5.0 * 10-6 
B) 6.5 * 10-5 
C) 2.3 * 10-4 
D) 8.3 * 10-5 
E) 5.6 * 10-6

Question 5

Which one of the following statements is true for a 0.1 M solution of a weak acid HA?

Accepted Answer

A) The concentration of H+ is slightly greater than the concentration of A-. 
B) The pH equals 1.0. 
C) The concentration of H+ is exactly equal to the concentration of A-. 
D) The pH is less than 1.0. 
E) The concentration of H+ is slightly less than the concentration of A-. 
A) The concentration of H+ is slightly greater than the concentration of A-. 
B) The pH equals 1.0. 
C) The concentration of H+ is exactly equal to the concentration of A-. 
D) The pH is less than 1.0. 
E) The concentration of H+ is slightly less than the concentration of A-.

Question 6

Al(OH)3 is an amphoteric hydroxide. Write a balanced ionic equation to show its reaction with KOH.

Accepted Answer

Al(OH)<sub

Question 7

Calculate the pH of a carbonated beverage in which the hydrogen ion concentration is 3.4 * 10-4 M.

Accepted Answer

A) 2.34 
B) 3.47 
C) 6.01 
D) 7.99 
E) 10.53 
A) 2.34 
B) 3.47 
C) 6.01 
D) 7.99 
E) 10.53

Question 8

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 9

Which of these acids is the strongest?

Accepted Answer

A) H2SO3 
B) H2SeO3 
C) H2TeO3 
A) H2SO3 
B) H2SeO3 
C) H2TeO3

Question 10

The pOH of a solution is 9.60.Calculate the hydrogen ion concentration in this solution.

Accepted Answer

A) 2.5 * 10-10 M 
B) 6.0 * 10-9 M 
C) 4.0 * 10-5 M 
D) 2.4 * 10-4 M 
E) 1.0 * 10-14 M 
A) 2.5 * 10-10 M 
B) 6.0 * 10-9 M 
C) 4.0 * 10-5 M 
D) 2.4 * 10-4 M 
E) 1.0 * 10-14 M

Question 11

Identify the conjugate base of HClO3 in the reaction ClO3- + HSO4-   HClO3 + SO42-

Accepted Answer

A) ClO3- 
B) HSO4- 
C) OH- 
D) H3O+ 
E) SO42- 
A) ClO3- 
B) HSO4- 
C) OH- 
D) H3O+ 
E) SO42-

Question 12

Which one of these salts will form a basic solution upon dissolving in water?

Accepted Answer

A) NaI 
B) NaF 
C) NH4NO3 
D) LiBr 
E) Cr(NO3)3 
A) NaI 
B) NaF 
C) NH4NO3 
D) LiBr 
E) Cr(NO3)3

Question 13

What is the pH of a 0.001 M Ca(OH)2 solution?

Accepted Answer

A) 3.0 
B) 11.0 
C) 2.7 
D) 17.0 
E) 11.3 
A) 3.0 
B) 11.0 
C) 2.7 
D) 17.0 
E) 11.3

Question 14

Which one of these net ionic equations represents the reaction of a strong acid with a strong base?

Accepted Answer

A) H+(aq)+ OH-(aq)$\rarr$H2O(aq) 
B) H+(aq)+ CH3NH2(aq)$\rarr$CH3NH3+(aq) 
C) OH-(aq)+ HCN(aq)$\rarr$H2O(aq)+ CN-(aq) 
D) HCN(aq)+ CH3NH2(aq)$\rarr$CH3NH3+(aq)+ CN-(aq) 
A) H+(aq)+ OH-(aq)$\rarr$H2O(aq) 
B) H+(aq)+ CH3NH2(aq)$\rarr$CH3NH3+(aq) 
C) OH-(aq)+ HCN(aq)$\rarr$H2O(aq)+ CN-(aq) 
D) HCN(aq)+ CH3NH2(aq)$\rarr$CH3NH3+(aq)+ CN-(aq)

Question 15

Calculate the pH of a 0.14 M HNO2 solution that is 5.7% ionized.

Accepted Answer

A) 0.85 
B) 1.70 
C) 2.10 
D) 11.90 
E) 13.10 
A) 0.85 
B) 1.70 
C) 2.10 
D) 11.90 
E) 13.10

Question 16

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 17

What is the pH of a 0.014 M Ca(OH)2 solution?

Accepted Answer

A) 1.85 
B) 1.55 
C) 12.15 
D) 12.45 
E) 15.85 
A) 1.85 
B) 1.55 
C) 12.15 
D) 12.45 
E) 15.85

Question 18

If the pH of tomato juice is 4.0, what is the hydroxide ion concentration in this solution?

Accepted Answer

1 * 10<sup

Question 19

Consider the weak bases below and their Kb values:   Arrange the conjugate acids of these weak bases in order of increasing acid strength.

Accepted Answer

A) C5H5NH+ 6H7OH 2H5NH 
B) C6H7OH 5H5NH+ 2H5NH 
C) C5H5NH+ 2H5NH3+ 6H7OH 
D) C6H7OH 2H5NH3+5H5NH+ 
E) C2H5NH3+5H5NH+ 6H7OH 
A) C5H5NH+ 6H7OH 2H5NH 
B) C6H7OH 5H5NH+ 2H5NH 
C) C5H5NH+ 2H5NH3+ 6H7OH 
D) C6H7OH 2H5NH3+5H5NH+ 
E) C2H5NH3+5H5NH+ 6H7OH

Question 20

What is the pH of a 0.0055 M HA (weak acid)solution that is 8.2% ionized?

Accepted Answer

A) 2.26 
B) 3.35 
C) 4.52 
D) 8.21 
E) 10.65 
A) 2.26 
B) 3.35 
C) 4.52 
D) 8.21 
E) 10.65

Exam 15: Acids and Bases

Write the chemical formula for phosphoric acid.

Acid strength decreases in the series: HNO3 > HF > CH3COOH. Which of these species is the strongest base?

An aqueous solution of KCl would be

The equilibrium constant for the reaction C6H5COOH(aq)+ CH3COO-(aq) C6H5COO-(aq)+ CH3COOH(aq) Is 3.6 at 25°C. If Ka for CH3COOH is 1.8 * 10-5, what is the acid dissociation constant for C6H5COOH?

Which one of the following statements is true for a 0.1 M solution of a weak acid HA?

Al(OH)3 is an amphoteric hydroxide. Write a balanced ionic equation to show its reaction with KOH.

Calculate the pH of a carbonated beverage in which the hydrogen ion concentration is 3.4 * 10-4 M.

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.

Which of these acids is the strongest?

The pOH of a solution is 9.60.Calculate the hydrogen ion concentration in this solution.

Identify the conjugate base of HClO3 in the reaction ClO3- + HSO4- HClO3 + SO42-

Which one of these salts will form a basic solution upon dissolving in water?

What is the pH of a 0.001 M Ca(OH)2 solution?

Which one of these net ionic equations represents the reaction of a strong acid with a strong base?

Calculate the pH of a 0.14 M HNO2 solution that is 5.7% ionized.

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

What is the pH of a 0.014 M Ca(OH)2 solution?

If the pH of tomato juice is 4.0, what is the hydroxide ion concentration in this solution?

Consider the weak bases below and their Kb values: Arrange the conjugate acids of these weak bases in order of increasing acid strength.

What is the pH of a 0.0055 M HA (weak acid)solution that is 8.2% ionized?

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Filters

Acid strength decreases in the series: HNO₃> HF > CH₃COOH. Which of these species is the strongest base?

The equilibrium constant for the reaction C₆H₅COOH(aq)+ CH₃COO^-(aq) C₆H₅COO^-(aq)+ CH₃COOH(aq) Is 3.6 at 25°C. If K_a for CH₃COOH is 1.8 * 10^-5, what is the acid dissociation constant for C₆H₅COOH?

Al(OH)₃ is an amphoteric hydroxide. Write a balanced ionic equation to show its reaction with KOH.

Calculate the pH of a carbonated beverage in which the hydrogen ion concentration is 3.4 * 10^-4 M.

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.

Identify the conjugate base of HClO₃ in the reaction ClO₃^- + HSO₄^- HClO₃ + SO₄^2-

What is the pH of a 0.001 M Ca(OH)₂ solution?

Calculate the pH of a 0.14 M HNO₂ solution that is 5.7% ionized.

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

What is the pH of a 0.014 M Ca(OH)₂ solution?

Consider the weak bases below and their K_b values: Arrange the conjugate acids of these weak bases in order of increasing acid strength.