Question

Why is a buffer important in chemistry?

Answer 1

Because they can moderate gross changes in solution `pH`.

Explanation:

A buffer is a mixture of a weak acid, and its conjugate base in appreciable proportions. The buffer acts to moderate gross changes in solution `pH`.

Given the link, a buffer will tend maintain `pH` at or about the `pK_a` of the original acid used. Biological systems are extensively buffered.