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Q.

A solution of  Al2(SO4)3[d=1.253gm/ml]  contain 22% salt by weight. The molarity, normality and molality of the solution is 

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a

0.805 M, 4.83 N, 0.825 m

b

0.825 M, 48.3 N, 0.805 M

c

None

d

4.83 M, 4.83 N, 4.83 M

answer is B.

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Detailed Solution

Molarity =%×10×dGMM=22×10×1.253342=0.806M

Normality =%×10×dGEM=22×10×1.253342/6=4.83N

Molality =22×1000342(100-22)=0.825m

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