Question

Calculate the freezing point of an aqueous solution containing 10.5 g of magnesium bromide in 200 g of water, assuming complete dissociation of magnesium bromide

Answer 1

dTf = kf*m

dTf = 0.512*(10.50/184)1000/200=0.146’C

dTf =freezing pt. of pure water- Freezing pt. of solution

0.146=0’C-Freezing pt. of solution

Freezing pt. of solution(containing MgBr2)=-0.146’C

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