1.

pH of `3xx10^(-5)` M `CaA_(2)`(aq) solution if `CaA_(2)` dissociates completely in water is [Given : `K_(a)` of `HA=5xx10^(-9)`].

Answer» Correct Answer - 8
`pOH = pK_(b)+log((0.1)/(1))=7-1=6`
pH = 14 - 6 = 8


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