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Question

Chemistry Question on Solutions

Which of the following is the correct representation of relative lowering of vapour pressure?

A

P0ΔP=P0−PP0\frac{P^{0}}{\Delta P}=\frac{P^{0}-P}{P^{0}}

B

P0−PP0\frac{P^{0}-P}{P^{0}}

C

P0P0−P\frac{P^{0}}{P^{0}-P}

D

ΔPP0=P0−PP0\frac{\Delta P}{P^{0}}=\frac{P^{0}-P}{P^{0}}

Answer

ΔPP0=P0−PP0\frac{\Delta P}{P^{0}}=\frac{P^{0}-P}{P^{0}}

Explanation

Solution

Relative lowering of vapour pressure is written as : ΔPP0=P0−PP0\frac{\Delta P}{P^{0}}=\frac{P^{0}-P}{P^{0}} P0P^{0} = Vapour pressure of pure component P=P = Vapour pressure of component in solution