1.

The pH of a 0.1 molar solution of the acid HQ is 3. The value of the ionization constant, K_(a) of the acid is

Answer»

`3 xx 10^(-1)`
`1 xx 10^(-3)`
`1 xx 10^(-5)`
`1 xx 10^(-7)`

Solution :`{:(HQ,hArr,H^(+),+,Q),(0.1,,,,),(0.1 - X,,x,,x):}`
`PH = 3, [H^(+)] = 10^(-3), x = 10^(-3)`
`K_(a) = ((x) xx (x))/((0.1 - x)) = ((10^(-3))^(2))/(0.1 - 10^(-3)) ~ (10^(-6))/(0.1) = 10^(-5)`


Discussion

No Comment Found

Related InterviewSolutions