The pH of pure water or neutral solution...

The pH of pure water or neutral solution at `50^(@)C` is …. `(pK_(w) = 13.26 = 13.26 " at " 50^(@)C)`

A

`7.0`

B

`7.13`

C

`6.0`

D

`6.63`

Verified by Experts

The correct Answer is:

D

`[H^(+)] [OH^(-)] = 10^(-13.26)`
` :. [H^(+)] = [OH^(-)] , :. [H^(+)]^(2) = 10^(-13.26)`
`[H^(+)] = 10 ^((-13.26)/2)`
pH = 6.63

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