Chemistry - Liquid Solution Question with Solution | TestHub

$\mathrm{\Delta }{\mathrm{T}}_{\mathrm{f}}={\mathrm{K}}_{\mathrm{f}}\times \mathrm{m}$
As${\mathrm{K}}_{\mathrm{f}}$is common and freezing points of K and b are equal so
$\frac{{\text{ΔT}}_{\text{f}}\text{of}\text{solution}\text{A}}{{\text{ΔT}}_{\text{f}}\text{of}\text{solution}\text{B}}=\frac{\frac{\text{Concentration}\text{of}\text{A}}{\text{Molar}\text{mass}\text{of}\text{A}({\text{M}}_{\text{A}})}}{\frac{\text{Concentration}\text{of}\text{B}}{\text{Molar}\text{mass}\text{of}{\text{B(M}}_{\text{B}}\text{)}}}$
$1=\frac{3/{\mathrm{M}}_{\mathrm{A}}}{9/{\mathrm{M}}_{\mathrm{B}}}$
So,${\mathrm{M}}_{\mathrm{B}}=\frac{9}{3}\times 60$
$=180$