Maharashtra Board Solutions for Chapter: Solutions, Exercise 2: Exercises

A living cell contains a solution which is isotonic with $0.3 \mathrm{M}$sugar solution. What osmotic pressure develops when the cell is placed in $0.1 \mathrm{M} \mathrm{KCl}$solution at body temperature?

The osmotic pressure of blood is $7.65 \mathrm{atm}$ at $310 \mathrm{K}$. An aqueous solution of glucose isotonic with blood has the percentage (by volume)

Henry's law constant for a gas ${\mathrm{CH}}_3\mathrm{Br}$ is $0.159 \mathrm{mol} {\mathrm{dm}}^{-3} \mathrm{atm}$ at $250°\mathrm{C}$. What is the solubility of ${\mathrm{CH}}_3\mathrm{Br}$ in water at $25°\mathrm{C}$ and a partial pressure of $0.164 \mathrm{atm}$?

Which of the following solutions will have higher freezing point depression and why?

a. $0.1 \mathrm{mNaCl}$ 

b. $0.05 {\mathrm{mAl}}_2{\left({\mathrm{SO}}_4\right)}_3$

An aqueous solution of a certain organic compound has a density of $1.063 \mathrm{g} {\mathrm{mL}}^{-1}$, an osmotic pressure of $12.16 \mathrm{atm}$ at ${25}^{° }\mathrm{C}$ and a freezing point of $-1.{03}^{°} \mathrm{C}$.  What is the molar mass of the compound? ${\mathrm{K}}_{\mathrm{f}}$ of water is $1.86 \mathrm{K} \mathrm{kg} {\mathrm{mol}}^{-1}$.

A mixture of benzene and toluene contains $30\%$ by mass of toluene. At ${30}^{°} \mathrm{C}$, vapour pressure of pure toluene is $36.77 \mathrm{mm} \mathrm{Hg}$ and that of pure benzene is $118.2 \mathrm{mm} \mathrm{Hg}$. Assuming that the two liquids form ideal solutions, calculate the total pressure and partial pressure of each constituent above the solution at ${30}^{°} \mathrm{C}$.

At ${25}^0 \mathrm{Ca}$ $0.1$ molal solution of ${\mathrm{CH}}_3\mathrm{COOH}$ is $1.35\%$ dissociated in an aqueous solution. Calculate freezing point and osmotic pressure of the solution assuming molality and molarity to be identical. $\left(-0.{189}^0\mathrm{C},2.48 \mathrm{atm}\right)$

$0.15 \mathrm{m}$ aqueous solution of $\mathrm{KCl}$  freezes at $-0.{510}^{°} \mathrm{C}$. Calculate $\mathrm{i}$ and osmotic pressure at $0^{°} \mathrm{C}$. Assume volume of solution equal to that of water.