AP Chemistry: Acids & Bases 2

Question 1

What is the pH of a 0.001 M solution of HCl at 25 °C?

Accepted Answer

3

Answer

HCl is a strong acid, so [H+] = 0.001 M and pH = -log(0.001) = 3.

Question 2

According to the Brønsted-Lowry theory, a base is defined as a substance that:

Accepted Answer

Accepts a proton

Answer

A Brønsted-Lowry base is a proton (H+) acceptor.

Question 3

What is the conjugate base of the bicarbonate ion (HCO3-)?

Accepted Answer

CO3^2-

Answer

Removing a proton from HCO3- yields the carbonate ion CO3^2-.

Question 4

Which of the following is a diprotic acid?

Accepted Answer

H2SO4

Answer

Sulfuric acid (H2SO4) can donate two protons, making it diprotic.

Question 5

At 25 °C, the ion product of water Kw equals:

Accepted Answer

1.0 × 10^-14

Answer

Kw = [H+][OH-] = 1.0 × 10^-14 at 25 °C.

AP Practice Test