Which of the following aqueous solutions cont | vedclass

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(A) The boiling point elevation is a colligative property,which depends on the number of particles in the solution. The formula for boiling point elev

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$NaCl$ solution

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(A) The boiling point elevation is a colligative property,which depends on the number of particles in the solution. The formula for boiling point elevation is $\Delta T_b = i 	imes K_b 	imes m$. Since the mass of the solute is the same $(10 \ g)$,the molality $(m)$ is inversely proportional to the molar mass $(M)$ of the solute. $NaCl$ $(M \approx 58.5 \ g/mol)$ and $KCl$ $(M \approx 74.5 \ g/mol)$ are electrolytes with a van't Hoff factor $(i)$ of $2$,while sugar ($C_{12}H_{22}O_{11}$,$M \approx 342 \ g/mol$) and glucose ($C_6H_{12}O_6$,$M \approx 180 \ g/mol$) are non-electrolytes $(i = 1)$. Comparing $NaCl$ and $KCl$,$NaCl$ has a lower molar mass,resulting in a higher molality $(m)$. Therefore,$NaCl$ produces the highest number of particles per unit mass,leading to the highest boiling point.

Which of the following aqueous solutions containing $10 \ g$ of solute in each case has the highest boiling point $(B.P.)$?

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