Embibe Experts Solutions for Chapter: Solutions, Exercise 4: Exercise 4

We have three aqueous solutions of $\mathrm{NaCl}$ labelled as ${\mathrm{A}}^{\text{'}},{}^{\text{'}}\mathrm{B}$ and $\text{'}\mathrm{C}$ with concentrations $0.1\mathrm{M},0.01\mathrm{M}$ and $0.001\mathrm{M}$ respectively. The value of van't Hoff factor for these solutions will be in the order

${\mathrm{P}}_{\mathrm{A}}$ and ${\mathrm{P}}_{\mathrm{B}}$ are the vapour pressure of pure liquid components, $\mathrm{A}$ and $\mathrm{B}$, respectively of an ideal binary solution. If ${\mathrm{X}}_{\mathrm{a}}$ represents the mole fraction of component $\mathrm{A}$ the total pressure of the solution will be.

$5.25\%$ solution of a substance is isotonic with a $1.5\%$ solution of urea (molar mass $=60 \mathrm{g} {\mathrm{mol}}^{-}$) in the same solvent. If the densities of both the solutions are assumed to be equal to $1.0 \mathrm{g} {\mathrm{cm}}^{-3}$, molar mass of the substance will be

The vapour pressure of pure water at$20°\mathrm{C} \mathrm{is} 17.5 \mathrm{mm} \mathrm{Hg}$. If $18 \mathrm{g}$ of glucose $\left({\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6\right)$ is added to$178.2 \mathrm{g}$of water at $20° \mathrm{C}$, the vapour pressure of resulting solution will be

If sodium sulphate is considered to be completely dissociated into cations and anions in aqueous solution, the change in freezing point of water$∆{\mathrm{T}}_{\mathrm{f}}$ , when $0.01 \mathrm{mole}$ of sodium sulphate is dissolved in $1 \mathrm{Kg}$ of water is (${\mathrm{K}}_{\mathrm{f}} = 1.86 \mathrm{K} \mathrm{kg} {\mathrm{mol}}^{-}$).

$18 \mathrm{g}$ glucose $\left({\mathrm{C}}_6{\mathrm{H}}_{12}{\mathrm{O}}_6\right)$  is added to $178.2 \mathrm{g}$ water. The vapour pressure of water (in torr) for this aqueous solution is

The freezing point of benzene decreases by $0.45°\mathrm{C}$ when $0.2 \mathrm{g}$ of acetic acid is added to $20 \mathrm{g}$ of benzene. If acetic acid associates form a dimer in benzene, percentage association of acetic acid in benzene will be _____. (${\text{K}}_{\text{f}}\text{ for benzene=5.12 K kg/mol}$)

For $1 \mathrm{m}$ aqueous solution of the following compounds, which one will show the highest freezing point?