1.

At 90^(@)C pure water has [H_(3)O^(+)] = 10^(-6) M, the value of K_(w) at this temperature will be

Answer»

`10^(-6)`
`10^(-12)`
`10^(-14)`
`10^(-8)`

Solution :For pure WATER `[H^(+)] = [OH^(-)], :. K_(w) = 10^(-12)`.


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