# How are buffers prepared?

##### 1 Answer
Aug 27, 2017

You take quantities of a weak acid and its conjugate base......in appreciable quantities.

#### Explanation:

And this is practically achieved by taking a weak acid, and adding (say) HALF an equivalent of a strong base......

For instance, we take a molar quantity of acetic acid, and add half an equiv of sodium hydroxide, we get a buffer whose $p H = 4.76$, where the $p {K}_{a} = 4.76$ of the original acid.