1.

A 0.1 M solution of a weak acid HA is 1% dissociated. The approximate value of dissociation constant is :

Answer»

`1.0xx10^(-4)mol L^(-1)`
`0.1XX10^(-2)mol L^(-1)`
`1xx10^(-3)mol L^(-1)`
`0.1xx10^(-4)mol L^(-1)`

Solution :`K_(a)=c alpha^(2)=0.1xx(0.01)^(2)`
`=0.1xx10^(-4)`


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