Question

How to pH of a mixture of a weak acid/weak base react with weak/strong base/acid respectively?

Answer 1

For this type of mixtures there can be two cases in general, 

(i) if the acids and bases are mixed in equal amounts (equivalents) 

(ii) if the acids and bases are mixed in different amounts (equivalents) 

First case will lead to phenomenon of Salt hydrolysis and second case will lead to formation of Buffer Solution.