Which one of the following 0.10 M aqueous so | vedclass

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(D) The freezing point depression $(\Delta T_{f})$ is a colligative property given by the formula $\Delta T_{f} = i 	imes K_{f} 	imes m$,where $i$ i

Vedclass · Accepted Answer

$KHSO_{4}$

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(D) The freezing point depression $(\Delta T_{f})$ is a colligative property given by the formula $\Delta T_{f} = i 	imes K_{f} 	imes m$,where $i$ is the Van't Hoff factor.For a given molality $(m)$ and solvent,$\Delta T_{f}$ is directly proportional to the Van't Hoff factor $(i)$.$1.$ Hydrazine $(NH_{2}NH_{2})$,Glucose $(C_{6}H_{12}O_{6})$,and Glycine $(NH_{2}CH_{2}COOH)$ are non-electrolytes,so their $i \approx 1$.$2.$ $KHSO_{4}$ is a strong electrolyte that dissociates in water as $KHSO_{4} ightarrow K^{+} + H^{+} + SO_{4}^{2-}$,giving $i \approx 3$.Since $KHSO_{4}$ has the highest Van't Hoff factor,it will exhibit the largest freezing point depression.

Which one of the following $0.10 \ M$ aqueous solutions will exhibit the largest freezing point depression?

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The freezing point of one molal $NaCl$ solution,assuming $NaCl$ to be $100\%$ dissociated in water,is ............ $^oC$. (molal depression constant $= 1.86$)

At higher altitude,the boiling point of water is $95\,^oC$. The amount of $NaCl$ added to $1\,kg$ of water $(K_b = 0.52\,K\,kg\,mol^{-1})$ in order to raise the boiling point of the solution to $100\,^oC$ (assume $90\%$ ionisation of $NaCl$) is .......... $g$.

Of the following $0.10 \ m$ aqueous solutions,which one will exhibit the largest freezing point depression?

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