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  • Vapour pressure of CCl4 at  250C is 143mm of Hg 0.5gm of a non-volatile solute (mol. wt. = 65) is dissolved in 100ml CCl4 . Find the vapour pressure of the sol

Vapour pressure of CCl4 at  250C is 143mm of Hg 0.5gm of a non-volatile solute (mol. wt. = 65) is dissolved in 100ml CCl4 . Find the vapour pressure of the solution (Density of  CCl4 = 1.58 g / cm2 )

Option: 1

141.43mm


Option: 2

94.39mm


Option: 3

199.34mm


Option: 4

141.93mm


Answers (1)

best_answer

As we learned 

 

Relative lowering of vapour pressure -

Relative lowering of vapour pressure on adding a non-volatile solute in a colligative properties.

-

 

 \frac{P^{o}-P_{s}}{P^{0}}=\frac{w\times M}{mW}=143-\frac{0.5\times 154}{65\times 158}\times 143=143-1.07=141.93mm

 

Posted by

sudhir.kumar

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