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If at a given temperature, pK(w)=13.68, ...

If at a given temperature, `pK_(w)=13.68`, then pH is

A

`6.84`

B

`7`

C

`6.79`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
For any aqeous solution at `25^(@)C`, we have `pH+pOH=pK_(w)`
Assuming that the solution is neutral, we have
`pH=pOH= (pK_(w))/(2)`
`=(13.68)/(2)=6.84`
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