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10^(-6) M NaOH is diluted by 100 times. ...

`10^(-6) M NaOH` is diluted by `100` times. The `pH` of diluted base is

A

Between 5 and 6

B

Between 6 and 7

C

Between 10 and 11

D

Between 7 and 8

Text Solution

Verified by Experts

The correct Answer is:
D
`[OH^(-)]` of `10^(-6)` M NaOH = `10^(-6)`
When 100 times diluted ,
`[OH^(-)] = (10^(-6))/(10^(2)) = 10^(-8)`
As it is weak base, but proteolysis of water will also take place. So, the contribution of `OH^(-)` ions from water must also be considered .
` :. ` Total `[OH^(-)] = 10^(-8) +10^(-7)`
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