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The freezing point of a solution containing 18 g of a non-volatile solute dissolved in 200 g of water decreases by 0.93. Find the molecular mass of solute. K_(f) for water is 1.86 K/m. |
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Answer» `M_(B)=(K_(f)xxW_(B))/(DeltaT_(f)xxW_(A))=((1.86" K kg mol"^(-1))xx(18 g))/((0.93 K)xx(0.2" kg"))=180" g mol"^(-1)`. |
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