CART - Chemistry Acceleration Readiness Acids, Bases, and Redox Questions and Answers

Question 1

According to the Brønsted-Lowry theory, which of the following best describes an acid?

Accepted Answer

A substance that can donate a proton (H⁺).

Answer

A substance that increases the hydroxide ion concentration in water.

Answer

A substance that can accept a proton (H⁺).

Answer

A substance that can accept a pair of electrons.

Question 2

A student prepares a solution of hydrochloric acid (HCl), a strong acid, with a concentration of 0.001 M. What is the pH of this solution?

Accepted Answer

3

Answer

11

Answer

-3

Answer

1

Question 3

In a laboratory neutralization reaction, aqueous sulfuric acid (H₂SO₄) is reacted with aqueous potassium hydroxide (KOH). What are the two products formed in this reaction?

Accepted Answer

Potassium sulfate (K₂SO₄) and water (H₂O)

Answer

Potassium hydride (KH) and sulfurous acid (H₂SO₃)

Answer

Dipotassium oxide (K₂O) and hydrogen sulfide (H₂S)

Answer

Potassium sulfite (K₂SO₃) and dihydrogen peroxide (H₂O₂)

Question 4

What is the oxidation number of manganese (Mn) in the permanganate ion, MnO₄⁻?

Accepted Answer

+7

Answer

+8

Answer

-1

Answer

+4

Question 5

In the following redox reaction, which species acts as the oxidizing agent?

2Na(s) + Cl₂(g) → 2NaCl(s)

Accepted Answer

Cl₂

Answer

Na

Answer

NaCl

Answer

This is not a redox reaction.

Question 6

Consider the following reversible reaction:

HCO₃⁻(aq) + H₂O(l) ⇌ H₂CO₃(aq) + OH⁻(aq)

Which of the following represents a Brønsted-Lowry conjugate acid-base pair?

Accepted Answer

H₂O and OH⁻

Answer

HCO₃⁻ and OH⁻

Answer

H₂O and H₂CO₃

Answer

HCO₃⁻ and H₂O