1.

The pH of the solution produced by mixing equal volumes of 2.0xx10^(-3) MCHlO_(4) and 1.0xx10^(-2) MKClO_(4) is

Answer»

`2.7`
`2.3`
`3.0`
`1.0`

Solution :`H^(+)` ions are obtained only from `HClO_(4)` which ionizes completely (being a STRONG acid ). Equal volume of `KClO_(4)` solution ADDED REDUCES `[H^(+)]` ions to HALF 3.0 . Hence,
`[H^(+)]=(2xx10^(-3))/(2) :. pH = - log (10^(-3))=3.0`.


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