Buffering Buffering occurs when pH changes are minimized. It involves chemical and physiological processes. The higher the weak base concentration, the better the buffering. The weaker the resulting acid, the better the buffering. A weak acid when dissolved yields few protons and its K d is small.
Weak acids have high pK. Strong acids have low pK .
Beyond this pK region, there is little buffering of the pH on adding acid to the buffer containing solution.