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How many grams of NaOH must be dissolved...

How many grams of `NaOH` must be dissolved in `1L^(-1)` of the solution to given it a `pH` value of `12`?

A

0.20 g `litre ^(-1)`

B

0.40 g `litre ^(-1)`

C

0.10 g `litre^(-1)`

D

1.2 g `litre ^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
`pH =12 " " :. pOH =2`
`:. [OH^(-)]=1xx10^(-2) M`
or `NaOH =1xx10^(-2)M`
`=40 xx 1xx 10^(-2)g L^(-1)`
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