A solution containing 10 g per dm^3 of urea | vedclass

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

Question

(A) Two solutions are isotonic if they have the same osmotic pressure,which implies they have the same molar concentration at the same temperature.Mol

Vedclass · Accepted Answer

$300$

Vedclass · Answer

(A) Two solutions are isotonic if they have the same osmotic pressure,which implies they have the same molar concentration at the same temperature.Molar concentration of urea $= \frac{10 \ g \ L^{-1}}{60 \ g \ mol^{-1}} = \frac{1}{6} \ mol \ L^{-1}$.$A$ $5 \%$ solution of a non-volatile solute means $5 \ g$ of solute in $100 \ mL$ of solution,which is $50 \ g$ of solute in $1 \ L$ $(dm^3)$ of solution.Let the molecular mass of the non-volatile solute be $M$.Molar concentration of the non-volatile solute $= \frac{50 \ g \ L^{-1}}{M \ g \ mol^{-1}} = \frac{50}{M} \ mol \ L^{-1}$.Since the solutions are isotonic,$\frac{1}{6} = \frac{50}{M}$.Therefore,$M = 50 	imes 6 = 300 \ g \ mol^{-1}$.

$A$ solution containing $10 \ g$ per $dm^3$ of urea (molecular mass $= 60 \ g \ mol^{-1}$) is isotonic with a $5 \%$ solution of a non-volatile solute. The molecular mass of this non-volatile solute is ........ $g \ mol^{-1}$.

Similar Questions

The osmotic pressure of $2.22\ \%\ (w/v)$ $CaCl_2$ solution at $27\ ^oC$ is $(R = 0.08\ L\ atm\ K^{-1}\ mol^{-1})$

Which of the following methods is used to obtain pure water from seawater?

The osmotic pressure at $17 \ ^oC$ of an aqueous solution containing $1.75 \ g$ of sucrose per $150 \ mL$ solution is .......... $atm$.

Which of the following pairs of aqueous solutions exhibits the same osmotic pressure at the same temperature? $\left[ \text{Molar mass of urea} = 60 \ g \ mol^{-1}, \text{sucrose} = 342 \ g \ mol^{-1} \right]$

Which of the following is $NOT$ used as a semipermeable membrane?

Vedclass Test Series

Exam Paper Generator

Online Exam Module