Which of the following salts will give highest `pH` in water?

Options

A. KCl
B. NaCl
C. `Na_(2)CO_(3)`
D. `CuSO_(4)`

Answer

C

Explanation

`Na_(2)CO_(3)` is a salt of strong base (NaOH) and weak acid `(H_(2)CO_(3))`. On hydrlysis this salt will produce strongly basic solution i.e., pH will be highst `(pHgt7)` for this solution. Other are combinatino of
KCl= strong acid + strong base `to` neutral solution `(pH~~7)`
`CuSO_(4)`= strong acid + weak base `to` Acidic solution `(pHlt7)`