How can you identify a buffer in chemistry?

1 Answer
Dec 20, 2016

A buffer is a mixture of a weak base and its conjugate acid mixed together in appreciable concentrations.............

Explanation:

A buffer is a mixture of a weak base and its conjugate acid mixed together in appreciable concentrations. They act to moderate gross changes in $p H$.

See this old answer..

So approx. equal concentrations of a weak base with its conjugate acid, or addition of half an equiv of strong acid to weak base, will generate a buffer. Why must it be half an equivalent?

Note that in the tritation of a weak acid wth a strong base, or conversely a weak base with a strong acid, you will always generate a buffer, and this region of the graph of $p H$ versus volume of titrant is called the $\text{buffer region}$.