What is the freezing point (in ) of a solution containing of (Molecular weight ) completely dissolve — Solutions and Colligative Properties Chemistry Question

💡 Solution & Explanation

$K_3[Fe(CN)_6]$ yields 4 ions ($3K^+ + [Fe(CN)_6]^{3-}$), so $i=4$. Molality $m = \frac{0.1/329}{100/1000} = \frac{1}{329}\text{ m}$. $\Delta T_f = i \times K_f \times m = 4 \times 1.86 \times \frac{1}{329} = \frac{7.44}{329} \approx 0.0226^\circ\text{C}$. Freezing point $= -2.26 \times 10^{-2} \approx -2.3 \times 10^{-2} ^\circ\text{C}$.