Chemistry - Liquid Solution Question with Solution | TestHub

Mass of 1 litre of solution = 1010 g
Mass of solvent$=1010-300\times \text{0.1}\Rightarrow 980g$

$\text{Molality(m)}=\frac{\text{0.1}}{\text{0.98}}\Rightarrow \text{0.102};$

$\text{Δ}{\text{T}}_{\text{f}}={\text{K}}_{\text{f}}\text{.}\text{m}\text{.}\text{i}=\left(1+\text{α}\right){\text{K}}_{\text{f}}·\text{m}$

$\text{Δ}{\text{T}}_{\text{f}}=\text{1.05}\times \text{1.86}\times \text{0.102}={\text{0.199}}^{\text{o}}C\; ;$

${\text{T}}_{\text{f}}=0-\text{0.199}=-{\text{0.199}}^{\text{o}}\text{C}$