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Question

The molality of a sulphuric acid solution is 0.2. Calculate the total weight having 1000gm of solvent.

A
1000g
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B
1098.6g
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C
980.4g
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D
1019.6g
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Solution

The correct option is D 1019.6g
Molality= Number of moles of solutekg solvent
0.2 moles are present in 1kg of solvent.
Mass of solution= Mass of solute + Mass of solvent
Mass of solute= 98×0.2=19.6g
Mass of solution= 1000+19.6=1019.6g

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