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Q.

How many moles of NaOH must be removed from one litre of aqueous solution to change its pH from 12 to 11?

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a

0.02

b

0.1

c

0.01

d

0.009

answer is A.

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Detailed Solution

Number of moles of NaOH must be removed,

=OH−final −OH−initial =

=10−2−10−3 =0.009

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