. The vapour pressure of a dilute aqueous solution of glucose


is 750 mm of Hg at 373 K. Calculate mole fraction of the solute :

A: 0.013

B: 0.25

C: 0.968

D: 0.75

 

Best Answer

Explanation:

The ratio of the number of moles of the solute divided by the total number of moles present in the solution is known as the mole fraction of a solute.

The pressure created by the vapour of a liquid above the surface of the liquid is known as vapour pressure.

The following formula calculates a solute's mole fraction:

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This formula is derived from Raoult's law, which states that each component of an ideal mixture of liquids has a partial

pressure equal to the vapour pressure of the pure component multiplied by its mole fraction in the mixture.

The vapour pressure figure stated in the question is 750 mm.

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Final answer:

Correct Answer is A)0.013

 

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