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A Solution Is Prepared by Adding 30

Question 64

Multiple Choice

A solution is prepared by adding 30.00 g of lactose (milk sugar) to 110.0 g of water at 55 °C. The partial pressure of water above the solution is ________ Torr. The vapour pressure of pure water at 55 °C is 0.1553 bar. The MW of lactose is 342.3 g mol-1.


A) 1.670
B) 94.1
C) 169.4
D) 116.3
E) 92.7

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