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2H(2)O hArr H(3)O^(o+) + overset(Theta)O...

`2H_(2)O hArr H_(3)O^(o+) + overset(Theta)OH,K_(w) = 10^(-14)` at `25^(@)C`, hence `K_(a)` is

A

`10^(-7)`

B

`5.55 xx 10^(-13)`

C

`10^(-14)`

D

`18 xx 10^(-17)`

Text Solution

Verified by Experts

The correct Answer is:
D
`K_(a) = ([H^(o+)][overset(Theta)OH])/([H_(2)O]) = (K_(w))/([H_(2)O]) = (10^(-14))/(55.6) = 18 xx 10^(-17)`
`(M` of `H_(2)O = 55.6)`
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