Question

Vapour pressure of water at 293k is 17.51mm lowering of vapour pressure of a sugar solution is 0.0614mm calculate relative lowering of vapur pressure
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Answer 1

Vapour pressure of water at 293k is 17.51mm lowering of vapour pressure of a sugar solution is 0.0614mm calculate relative lowering of vapur pressure .

vapor pressure of pure water at 293K , $P_0$ = 17.51mm Hg

lowering of vapor pressure of a sugar solution , $(P_0-P)=\Delta P$ = 0.0614 mm Hg

we know,

relative lowering of vapor pressure is the ratio of lowering of vapor pressure of sugar and vapor pressure of pure water.

so, relative lowering of vapor pressure = 0.0614 mm Hg/17.51 mm Hg

= 0.0035

hence, answer is 0.035