# How does the pH of acid change when a base is added?

Jun 17, 2018

Would not $p H$ increase?

#### Explanation:

By definition, $p H = - {\log}_{10} \left[{H}_{3} {O}^{+}\right]$...

And thus when a base is added to acid solution....$\left[{H}_{3} {O}^{+}\right]$ DECREASES...

${H}_{3} {O}^{+} + H {O}^{-} \rightarrow {H}_{2} O$

And if $\left[{H}_{3} {O}^{+}\right]$ DECREASES, would not $p H$ increase...?