# What is the relationship between the pH of water, vinegar, and ammonia?

Aug 30, 2016

Well, since they are ALL aqueous solutions, their ion product, $\left[H {O}^{-}\right] \left[{H}_{3} {O}^{+}\right]$ $=$ ${10}^{- 14}$ under standard conditions.

#### Explanation:

And taking negative $- {\log}_{10}$ of both sides, we would find that,

$p O H + p H = 14$.

For water $p O H = p H = 7$. For vinegar, a weak acid, $p H \cong 2.2$. For ammonia, a weak base, $p H \cong 11.5$.

What are $p O H$ for vinegar, and ammonia?