pK_(a) of weak acid (HA) and pK_(b) of weak base (BOH) are 3.2 and 3.4 respectively. The pH of their salt (AB) solution is

pK_(a) of weak acid (HA) and pK_(b) of weak base (BOH) are 3.2 and 3.4

1.	pK_(a) of weak acid (HA) and pK_(b) of weak base (BOH) are 3.2 and 3.4 respectively. The pH of their salt (AB) solution is
Answer» `7.0` `1.0` `7.2` `6.9` Solution :`pH = 7 + (1)/(2) (pK_(a)-pK_(B))=7+(1)/(2)(3.2-3.4)` `=7-0.1=6.9`