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Question

(A) Molality $(m)$ is defined as the number of moles of solute per kilogram of solvent.Statement-$2$ correctly defines $1$ molal solution as $1$ mole

Vedclass · Accepted Answer

Statement-$1$ is true. Statement-$2$ is true,Statement-$2$ is the correct explanation for Statement-$1$.

Vedclass · Answer

(A) Molality $(m)$ is defined as the number of moles of solute per kilogram of solvent.Statement-$2$ correctly defines $1$ molal solution as $1$ mole of solute in $1000 \ g$ $(1 \ kg)$ of water.For glucose $(C_6H_{12}O_6)$,the molar mass is $180 \ g/mol$.Therefore,$1$ mole of glucose is $180 \ g$.Since Statement-$1$ states that $1$ molal glucose solution contains $180 \ g$ of glucose in $1000 \ g$ of water,it is also true.Statement-$2$ provides the definition of molality,which explains why $1$ mole $(180 \ g)$ of glucose in $1000 \ g$ of water constitutes a $1$ molal solution.Thus,Statement-$2$ is the correct explanation for Statement-$1$.

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