The aqueous solution of which of the following salt will have the lowest pH ?

Options

A. `NaClO_(3)`
B. `NaClO`
C. `NaClO_(4)`
D. `NaClO_(2)`

Answer

C

Explanation

`NaClO_(4) to Na^(+) + ClO_(4)^(-)`
`NaClO_(3) to Na^(+) + ClO_(3)^(-)`
`NaClO_(2) to Na^(+) + ClO_(2)^(+)`
`NaClO to Na^(+) + ClO^(-)`
In aqueous solution, these compounds decompose into ions. `ClO_(4)^(-)` will most easily abstract proton from water molecules . So it will be most acidic.