(i) What would be the vapour pressure of a 0.5 molal solution of a non volatile solute in benzene at 30^(@)C . The vapour prssure of pure benzene at 30^(@)C is 119.6 torr. (ii) 4 g of non-volatile solute were dissolved in 250g of water. The depression in freezing point to be 0.87 K. Calculate the molaar mass of the slute .. For watr K_(f)=1.856K kg/mol. (iii) 0.50g of non-voltalie organic subtance was dissolved in 100 ml of carbon tetrachloride at 30^(@)C. The vapour pressure of the solution was found to be 171.9. torr. Calculate the molal mass of the substane. Vapour pressure of C Cl_(4) "at" 30^(@)C is 143.0 torr and its density is 1.58 g.ml.

(i) What would be the vapour pressure of a 0.5 molal solution of a non

1.	(i) What would be the vapour pressure of a 0.5 molal solution of a non volatile solute in benzene at 30^(@)C . The vapour prssure of pure benzene at 30^(@)C is 119.6 torr. (ii) 4 g of non-volatile solute were dissolved in 250g of water. The depression in freezing point to be 0.87 K. Calculate the molaar mass of the slute .. For watr K_(f)=1.856K kg/mol. (iii) 0.50g of non-voltalie organic subtance was dissolved in 100 ml of carbon tetrachloride at 30^(@)C. The vapour pressure of the solution was found to be 171.9. torr. Calculate the molal mass of the substane. Vapour pressure of C Cl_(4) "at" 30^(@)C is 143.0 torr and its density is 1.58 g.ml.
Answer» SOLUTION :`114.94`TORR (II) `341.3` (III) `M=63.3`