Which of the following aqueous solutions exhi | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The freezing point depression is given by the formula $\Delta T_f = i 	imes K_f 	imes m$, where $i$ is the van't Hoff factor and $m$ is the mola

Vedclass · Accepted Answer

$0.05 \, m \, MgSO_4$

Vedclass · Answer

(B) The freezing point depression is given by the formula $\Delta T_f = i 	imes K_f 	imes m$, where $i$ is the van't Hoff factor and $m$ is the molality. Assuming complete dissociation, $i$ equals the number of ions produced per formula unit.For $A$: $0.1 \, m \, NaClO_4 ightarrow i = 2$, so $\Delta T_f \propto 0.1 	imes 2 = 0.2$.For $B$: $0.05 \, m \, MgSO_4 ightarrow i = 2$, so $\Delta T_f \propto 0.05 	imes 2 = 0.1$.For $C$: $0.08 \, m \, AlPO_4 ightarrow i = 2$, so $\Delta T_f \propto 0.08 	imes 2 = 0.16$.For $D$: $0.06 \, m \, Al_2(SO_4)_3 ightarrow i = 5$, so $\Delta T_f \propto 0.06 	imes 5 = 0.3$.Comparing the values, $0.1$ is the lowest, which corresponds to option $B$.

Column-$I$ (Various solutions)	Column-$II$ (Freezing point)
$a$. $0.1 \, M \ BaCl_2$ solution	$p$. $271 \, K$
$b$. $0.1 \, M \ NaCl$ solution	$q$. $270 \, K$
$c$. $0.1 \, M \ K_3[Fe(CN)_6]$ solution	$r$. $268 \, K$
$d$. $0.1 \, M \ Al_2(SO_4)_3$ solution	$s$. $269 \, K$

Which of the following aqueous solutions exhibits the lowest freezing point depression, assuming complete dissociation?

Similar Questions

Which of the following will show maximum depression in freezing point when the concentration is $0.1 \ M$?

Camphor is often used in molecular mass determination because

The freezing point of a $0.05 \ molal$ solution of a non-electrolyte in water is $(K_f = 1.86 \ K \ kg \ mol^{-1})$:

$1.95 \ g$ of non-volatile and non-electrolyte solute dissolved in $100 \ g$ of benzene lowered the freezing point of it by $0.64 \ K$. The molar mass of the solute (in $g \ mol^{-1}$) is: $(K_{f}(C_6H_6) = 5.12 \ K \ kg \ mol^{-1})$

Vedclass Test Series

Exam Paper Generator

Online Exam Module