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Question

How many grams of NaOH should be added to water to prepare 250 ml solution of 2 M NaOH?

A
9.6×103
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B
2.4×103
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C
20
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D
24
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Solution

The correct option is B 20
Let the weight of NaOH added by x
Moles=x40=weightmolecular weight

Molarity=Molesofsolute×1000Volume(ml)

2=x×100040×250

x=20 gm

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