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Q.

When a liquid that is immiscible with water was steam distilled at 95.2.C at a total pressure of 748 tort the distillate contained 1.25 g of the liquid per gram of water. The vapour pressure of water is 648 toff at 95.2oC, what is the molar mass of liquid?

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a

166 g/mol

b

145.8 g/mol

c

7.975 g/mol

d

None of these

answer is C.

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Detailed Solution

For two immiscible liquid;
PA∘=Ptotal −PH2O∘=748−648⇒100WAWB=PA∘MAPB∘MB; MA=1.251×648×18100⇒145.8

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