What is a buffer in chemistry?

1 Answer
Oct 11, 2016

Answer:

A buffer solution is defined as a a solution that resist the change on its pH.

Explanation:

A buffer solution is defined as a a solution that resist the change on its pH.

It is usually prepared from a weak acid and the salt of its conjugate base or a weak base and the salt of its conjugate acid.

An example of a buffer solution is a solution made from acetic acid #CH_3COOH# and sodium acetate #NaCH_3COO#.

Note that, when an acid is added to the solution, it will react with #NaCH_3COO#, however, if a base is added to the solution it will react with #CH_3COOH#. In both cases, the change on the pH will be very small.

Here is a video that fully explains this topic:
Acid - Base Equilibria | Buffer Solution.