Dry air is passed through a solution containi | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) According to the Ostwald-Walker method,the relative lowering of vapour pressure is given by the ratio of the loss in weight of the solvent to the

Vedclass · Accepted Answer

$100$

Vedclass · Answer

(C) According to the Ostwald-Walker method,the relative lowering of vapour pressure is given by the ratio of the loss in weight of the solvent to the loss in weight of the solution.$\frac{P^0 - P_s}{P^0} = \frac{	ext{Loss in weight of solvent}}{	ext{Loss in weight of solution}} = \frac{0.05}{2.5}$Also,by Raoult's Law,$\frac{P^0 - P_s}{P^0} = \frac{n}{n + N} \approx \frac{n}{N} = \frac{w 	imes M}{m 	imes W}$Where $w = 10 \ g$ (solute),$W = 90 \ g$ (solvent),$M = 18 \ g/mol$ (molar mass of water),and $m$ is the molar mass of the solute.$\frac{0.05}{2.5} = \frac{10 	imes 18}{m 	imes 90}$$\frac{1}{50} = \frac{180}{90m} = \frac{2}{m}$$m = 2 	imes 50 = 100 \ g/mol$.

Dry air is passed through a solution containing $10 \ g$ of solute and $90 \ g$ of water,and then it is passed through pure water. The loss in weight of the solution is $2.5 \ g$ and the loss in weight of the pure solvent is $0.05 \ g$. Calculate the molecular weight of the solute.

Similar Questions

Foetal ejection reflex in human female is induced by

$AB_{3(g)}$ dissociates as $AB_{3(g)} \rightleftharpoons AB_{2(g)} + \frac{1}{2}B_{2(g)}$. When the initial pressure of $AB_3$ is $800 \ torr$ and the total pressure at equilibrium is $900 \ torr$,what fraction of $AB_{3(g)}$ is dissociated (in $\%$)?

$A$ given system undergoes a change in which the work done by the system equals the decrease in its internal energy. The system must have undergone an

If $\frac{(1+i) x-i}{2+i}+\frac{(1+2 i) y+i}{2-i}=1$,then $(x, y)$ is equal to

When an electric current is passed through acidulated water,$112 \ mL$ of hydrogen gas at $N.T.P.$ is collected at the cathode in $965 \ seconds$. The current passed,in amperes,is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module