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At 90^(@)C, pure water has [H(3)O^(o+)] ...

At `90^(@)C`, pure water has `[H_(3)O^(o+)] = 10^(-6.7)mol L^(-1)`. What is the value of `K_(w)`at `90^(@)C`?

A

`10^(-6)`

B

`10^(-12)`

C

`10^(13.4)`

D

`10^(-6.7)`

Text Solution

Verified by Experts

The correct Answer is:
C
Silver chromate is `Ag_(2)CrO_(4)`
`:. K_(sp)=[Ag^(+)]^(2)[CrO_(4)^(2-)]`.
If solubility is S mol `L^(-1), K_(sp) = 4 s^(3)`.
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