Which of the following solutions is a buffer?

Check all that apply.

A. a solution made by mixing 100 mL of 0.100 M CH3COOH and 500 mL of 0.100 M NaOH

B. a solution made by mixing 100 mL of 0.100 M CH3COOK and 50 mL of 0.100 M KCl

C. a solution made by mixing 100 mL of 0.100 M CH3COOH and 50 mL of 0.100 M HCl

D. a solution made by mixing 100 mL of 0.100 M CH3COOH and 50 mL of 0.100 M NaOH

Question

Chemistry

Quintin

1 February, 21:38

Which of the following solutions is a buffer?

Check all that apply.

A. a solution made by mixing 100 mL of 0.100 M CH3COOH and 500 mL of 0.100 M NaOH

B. a solution made by mixing 100 mL of 0.100 M CH3COOK and 50 mL of 0.100 M KCl

C. a solution made by mixing 100 mL of 0.100 M CH3COOH and 50 mL of 0.100 M HCl

D. a solution made by mixing 100 mL of 0.100 M CH3COOH and 50 mL of 0.100 M NaOH

+4

Answers (1)

Know the Answer?

Gael Gallagher · Answer 1

D. a solution made by mixing 100 mL of 0.100 M CH3COOH and 50 mL of 0.100 M NaOH

Explanation:

Buffer solutions are the solutions which can resist the change in the pH up to some extent.

The pH of a buffer solution can be measured by the equation known as Henderson-Hasselbalch equation.

pH=pKa+log[base]/[acid]

Buffer solutions are the solutions of either weak acid and conjugate base of it or weak base and conjugate acid of it.

Hence, a weak acid and a strong base can result in weak acid and it's conjugate and can acts as a buffer.

Option D is correct.