Question

What are the uses of buffer solutions?

Answer 1

Buffers are used to keep the `pH` of solution tolerably close to a given value..........

Explanation:

See [this old link.](https://socratic.org/questions/how-do-buffers-maintain-ph)

And given the buffer equation.........

`pH=pK_a+log_10{[[A^-]]/[[HA]]}`

To keep `pH` around a certain value we choose an acid whose `pK_a` is close to the desired `pH`. Biological systems are extensively buffered.