(C) The freezing point depression is given by $\Delta T_f = i \times K_f \times m$. For the dissociation of $HX \rightleftharpoons H^+ + X^-$,the van'

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(C) The freezing point depression is given by $\Delta T_f = i \times K_f \times m$. For the dissociation of $HX \rightleftharpoons H^+ + X^-$,the van't Hoff factor $i = 1 + \alpha$ (where $n=2$). Given $\alpha = 0.3$,$i = 1 + 0.3 = 1.3$. $\Delta T_f = 1.3 \times 1.85 \times 0.2 = 0.481 \ ^oC$. The freezing point of the solution $T_f = T_f^o - \Delta T_f = 0 - 0.481 \ ^oC = -0.481 \ ^oC$. Thus,the value is close to $-0.48 \ ^oC$.

Class 12 Chemistry Solutions Colligative properties of electrolyte

Medium

For a $0.2 \ m$ aqueous solution of a weak acid $HX$,the degree of ionization is $0.3$. If $K_f$ for water is $1.85 \ K \ kg \ mol^{-1}$,the freezing point of the solution will be close to .......... $^oC$.

A
$-260$
B
$+0.48$
C
$-0.48$
D
$-0.36$

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Colligative properties of electrolyte

$A$ $0.1 \ mol$ of a binary electrolyte undergoes complete dissociation in $250 \ g$ of a protic solvent. If the elevation in boiling point is $1.5 \ K$,the molal elevation constant $(K_b)$ is ............. $K \ kg \ mol^{-1}$.

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The freezing point (in ${}^{\circ}C$) of a solution containing $0.1 \ g$ of $K_3[Fe(CN)_6]$ (Mol. Wt. $329$) in $100 \ g$ of water $(K_f = 1.86 \ K \ kg \ mol^{-1})$ is

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For a dilute aqueous solution of glucose,the van't Hoff factor $(i)$ is:

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The freezing point of an equimolal aqueous solution will be highest for:

DifficultIIT 1990

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Which of the following aqueous solutions has the highest boiling point,under identical conditions having a concentration of $0.03 \ m$?

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For a $0.2 \ m$ aqueous solution of a weak acid $HX$,the degree of ionization is $0.3$. If $K_f$ for water is $1.85 \ K \ kg \ mol^{-1}$,the freezing point of the solution will be close to .......... $^oC$.

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$A$ $0.1 \ mol$ of a binary electrolyte undergoes complete dissociation in $250 \ g$ of a protic solvent. If the elevation in boiling point is $1.5 \ K$,the molal elevation constant $(K_b)$ is ............. $K \ kg \ mol^{-1}$.

The freezing point (in ${}^{\circ}C$) of a solution containing $0.1 \ g$ of $K_3[Fe(CN)_6]$ (Mol. Wt. $329$) in $100 \ g$ of water $(K_f = 1.86 \ K \ kg \ mol^{-1})$ is

For a dilute aqueous solution of glucose,the van't Hoff factor $(i)$ is:

The freezing point of an equimolal aqueous solution will be highest for:

Which of the following aqueous solutions has the highest boiling point,under identical conditions having a concentration of $0.03 \ m$?

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