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5 cm^(3) of acetone is added to 100 cm...

`5 cm^(3)` of acetone is added to `100 cm^(3)` of water . Then the vapour pressure of the vapour pressure of the solution _______.

A

It will be equal to the vapour pressure of pure water

B

It will be less than the vapour pressure of pure water

C

It will begreater than the vapour pressure of pure water

D

It will be very large

Text Solution

Verified by Experts

The correct Answer is:
B
Acetone solution has vapour pressure less than pure water.
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Twenty grams of a solute are added to 100g of water at 25^(@)C . The vapour pressure of pure water is 23.76 mmHg , the vapour pressure of the solution is 22.41 Torr. (a) Calculate the molar mass of the solute. (b) What mass of this solute is required in 100g of water of reduce the vapour pressure ot one-half the value for pure water?

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