1.

Which of the following statement (s) is (are) correct

Answer»

The pH of `1.0 xx 10^(-8) M` solution of HCl is 8
The conjugate base of `H_(2)PO_(4)^(-)` is `HPO_(4)^(2-)`
Autoprotolysisconstant of WATER increases with temperature
When a solution of a weak monoprotic ACID is titrated against a strong base, at half-neutralisation POINT `pH = (1//2) pK_(a)`

Solution :pH of `1 xx 10^(-8) M` is below to 7
`H_(2)PO_(4)^(-) + H_(2)O hArr HPO_(4)^(2-) + H_(3)O^(+)`
`H_(2)O + H_(2)O hArr OH^(-) + H_(3)O^(+)`
K (Auto protolysis constant of water i.e., ionic product of water) increases with temperature.
For half neutralisation of a weak acid by a weak base,
`pH = pK_(a) + log.(["Salt"])/(["Acid"])`
[Salt] = [Acid], `:. pH = pK_(a)`.


Discussion

No Comment Found

Related InterviewSolutions