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Q.

Calculate molality of one litre of solution containing 200 gm CaBr2. Given density of solution equal to 1.0 gm/ml. (Atomic mass of Ca=40, Br=80)

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a

1 m

b

1.4 m

c

1.25 m

d

0.8 m

answer is B.

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Detailed Solution

m=molkg

m=2002001000−200×1000 =1.25

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Calculate molality of one litre of solution containing 200 gm CaBr2. Given density of solution equal to 1.0 gm/ml. (Atomic mass of Ca=40, Br=80)