Q.

To make a solution of pH = 12, the amount of NaOH dissolved in one liter of the solution should be

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a

0.1 g

b

0.2 g

c

0.4 g

d

1.2 g

answer is C.

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Detailed Solution

pH = 12  ; POH =14-12= 2or      OH-=10-2 Mor     NaOH=10-2 moles/lit                           No. moles(n) =wGmw W=10-2× 40 = 0.4 g L-1
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