Which of the following acid and base pairs are capable of acting as a buffer?

Determine the pH of an aqueous solution of 0.01 M acetic acid, . The pKa of acetic acid is 4.75.

Which combination(s) would create a buffer solution?

I. Weak acid

II. Weak acid's conjugate base

III. Strong acid

IV. Strong base

V. Weak base

VI. Weak base's conjugate acid

You are in chemistry lab performing a titration. You were given 15 mL of an aqueous solution with an unknown concentration of acetic acid, to solve through titration with concentrated sodium hydroxide, . You know that the pKa of acetic acid is 4.75 and that your titrant is 0.1 M sodium hydroxide, .

The endpoint was determined at 10 mL of sodium hydroxide, . What is the pH after 5 mL of was added?

Determine which of these solution combinations form a buffer.

Determine which combination of solutions would create a buffer solution.

Determine which solution(s) will yield a buffer solution.

I. 10 mL of 0.5 M HCl + 20 mL of 0.5 M acetate

II. 10 mL of 0.5 M HCl + 10 mL of 0.5 M acetate

III. 10 mL of 0.5 M HCl + 10 mL of 1.0 M acetate

IV. 10 mL of 0.5 M HCl + 10 mL of 1.5 M acetate