A solution containing 62 g enthylene glycol in 250 g water is cooled to -10°C. If K f for water is 1.86 K kg m o l - 1 , the amount of water (in g) separated as ice is

Question

A solution containing 62 g enthylene glycol in 250 g water is cooled to -10°C. If K f for water is 1.86 K kg m o l - 1 , the amount of water (in g) separated as ice is, 32, 48, 16, 64

MARKS App · Accepted Answer

Δ T f = k f × W B M B × 1000 W A W A ( c a l c u l a t e d = k f Δ T f × W B M B × 1000 Δ T f = T f ° - T f s = 0 - ( - 10 ) = 10 ⇒ W A = 1.86 10 × 62 62 × 1000 = 186 g Amount of ice separated = 250 - 186 = 64 g

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