A buffer contains the weak acid HA and its conjugate base A-. the weak acid has a p Ka of 4.82 and the buffer has a pH of 4.25. Which statement is true of the relative concentration of the weak acid and its conjugate base in the buffer?

a) [HA} > [A-]

b) [Ha} < [A-]

c) [HA]=[A-]

Question

Angel Hubbard

Chemistry

3 October, 02:10

A buffer contains the weak acid HA and its conjugate base A-. the weak acid has a p Ka of 4.82 and the buffer has a pH of 4.25. Which statement is true of the relative concentration of the weak acid and its conjugate base in the buffer?

a) [HA} > [A-]

b) [Ha} < [A-]

c) [HA]=[A-]

+2

Answers (1)

Know the Answer?

Melvin Watts · Answer 1

I think the correct answer is A. A buffer is a substance that resists small change in the acidity of a solution when an acid or base is added to the solution. Usually, a buffer involves a weak acid or a weak alkali and one of its salt.

A buffer contains the weak acid HA and its conjugate base A-. the weak acid has a p Ka of 4.82 and the buffer has a pH of 4.25. Which statement is true of the relative concentration of the weak acid and its conjugate base in the buffer?a) [HA} > [A-]b) [Ha} < [A-]c) [HA]=[A-]

A buffer contains the weak acid HA and its conjugate base A-. the weak acid has a p Ka of 4.82 and the buffer has a pH of 4.25. Which statement is true of the relative concentration of the weak acid and its conjugate base in the buffer?

a) [HA} > [A-]

b) [Ha} < [A-]

c) [HA]=[A-]