Explain why pH buffers require the presence of weak acids or weak bases in order to perform their function

ph-buffers
weak-acids
weak-bases

#1

Explain why pH buffers require the presence of weak acids or weak bases in order to perform their function.

Answer:

If, instead of weak acids and bases, we use strong ones, they will completely and irreversibly turn into their conjugates (HCl is very hard to reform, it likes to be H+ [or H3O+] and Cl-). Since the point of a buffer is to stop substances from raising/lowering the pH, we want to use acids and bases that are able to reform from their conjugates, so we use weaker acid and bases, instead of very strong ones.