What is a buffer? How do they work? How can they maintain pH?

Mar 17, 2018

Well, a buffer is a solution of a weak base, and its conjugate acid in APPRECIABLE quantities...

Explanation:

...and a buffer acts to mimimize GROSS changes in $p H$...

A buffer is composed of a weak base, and its conjugate acid in appreciable quantities that acts to resists gross changes in $p H$...and for such a system...

$p H = p {K}_{a} + {\log}_{10} \left\{\frac{\left[{A}^{-}\right]}{\left[H A\right]}\right\}$

What is $p H$ when $\left[H A\right] = \left[{A}^{-}\right]$?