# How do you calculate Keq from pKa?

Aug 20, 2016

#### Answer:

${K}_{a} = {10}^{- p {K}_{a}}$

#### Explanation:

The relationship between ${K}_{e q}$ which is in this case called the acid dissociation ${K}_{a}$ and $p {K}_{a}$ is the following:

$p {K}_{a} = - \log {K}_{a}$

$\implies {K}_{a} = {10}^{- p {K}_{a}}$