Question

Calculate the ph of a mixture of 0.25 m acetic acid (ch3cooh) and 0.1 m sodium acetate (ch3coo- na ) in a total volume of 1 l. the pka of acetic acid is 4.76.

Answer 1

The pH of the mixture of 0.25 M acetic acid and 0.1 M sodium acetate is 4.16.

Step-by-step explanation:

The question asks to calculate the pH of a mixture of 0.25 M acetic acid (CH3COOH) and 0.1 M sodium acetate (CH3COO- Na) in a total volume of 1 L. Given that the pKa of acetic acid is 4.76, we can use the Henderson-Hasselbalch equation to calculate the pH:

pH = pKa + log([CH3COO-] / [CH3COOH])

Plugging in the values, we get pH = 4.76 + log(0.1 / 0.25) = 4.76 - 0.6 = 4.16.