1.

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

Answer»

6.9
`7.0`
`1.0`
7.2

Solution :Salt of weak ACID and weak base
`PH = (1)/(2)(pk_(w)+ pK_(a) - pK_(b))`
`= (1)/(2)(14 + 3.2 - 3.4)`
= 6.9


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