# Theory of acids and bases

## pH of acids

### Exercise 12

Explain the relation between $K_a$ and the strength of a weak acid !

a) The greater $K_a$ is , the stronger is the acid b) The greater $K_a$ is, the weaker is the acid c) the strength of an acid does not depend upon $K_a$ d) $K_a$ is a constant for all acids

The correct answer is: a) The greater $K_a$ is , the stronger is the acid