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The dissoctiation of water of 25^(@)C is...

The dissoctiation of water of `25^(@)C` is `1.9 xx 10^(-7)%` and the density of water is `1g//cm^(3)` the ionisation constant of water is

A

`1.0xx10^(-15)`

B

`1.0xx10^(-14)`

C

`1.0xx10^(-16)`

D

`1.0xx10^(-6)`

Text Solution

Verified by Experts

The correct Answer is:
C
`{:(,H_(2)OhArrH^(+)+OH^(-),,[H_(2)O]=55.5,),(,KrArr([H^(+)][OH^(-)])/([H_(2)O]),,[H^(+)]=[OH^(-)]=10^(-7),),(,,,at -25^(@)C,):}`
`K=(10^(-7)xx10^(-7))/(55.5)`
`K +1.8xx10^(-16)`
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