Question

Do buffers resist pH change? If so, why?

Answer 1

They do indeed resist gross changes in `pH`....up to the capacity of the buffer.

Explanation:

See this [old answer and links.](https://socratic.org/questions/how-do-you-predict-the-ph-of-a-buffer-solution-using-the-henderson-hasselbalch-e)

You have to know.....

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

What is the `pH` at half-equivalence, when `[A^-]=[HA]`?