Question

How do buffers work to maintain pH?

Answer 1

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

Explanation:

See this older answer. You should review your understanding of the `"logarithmic function"`, because this is crucial in understanding how the equation works.

Biological systems are extensively buffered, and in a buffer, the `pH` of the solution remains tolerably close the to the `pK_a` of the original acid.