# Why aren't extremely dilute acid solutions basic in nature? [duplicate]

This question already has an answer here:

Lets say we prepare a solution of $\ce{HCl}$ with a concentration of $\mathrm{10^{-8}}$. Even on full dissociation (which it will, because it is a strong acid), the $\ce{H+}$ ion concentration due to $\ce{HCl}$ is $\mathrm{10^{-8}}$.

So shouldn't the pH be 8? Is there any factor I am missing? Does the properties of acids change at low concentrations? If so, then how?

## marked as duplicate by YAHB, orthocresol♦Apr 1 '17 at 18:10

Water is a weak acid, too. At that concentration of your acid, the number of hydronium ions from water will be roughly $10^{-7}$ molar, making the solution roughly neutral.