?

General Chemistry

Free Version

Upgrade subject to access all content

Difficult

Adding HCl to a buffered solution

CHEM-776GPT

You have prepared a buffered solution using $250. \ mL$ of $0.15 \ M$ propionic acid and $200. \ mL$ of $0.30 \ M$ propionate.

$K_{a} \text{(propionic acid)} = 1.3 \times 10^{-5}$

What is the $pH$ change experienced by the buffered solution after the addition of $20.0 \ mL$ $0.05 \ M \ HCl$?

A

$pH$ increases by $0.20$.

B

$pH$ decreases by $0.20$.

C

$pH$ increases by $0.02$.

D

$pH$ decreases by $0.02$

E

No change in $pH$.