Question

If for a sucrose,elevation in boiling point is ${1.0}^{o}C$,then what will be the boiling point of $NaCl$ solution for same molal concentration?

• A. ${1.0}^{o}C$
• B. ${2.0}^{o}C$
• C. ${3.0}^{o}C$
• D. ${4.0}^{o}C$

Answer 1

Answer: (B)

${2.0}^{o}C$

$\Delta T_b=i{K}_{b}m$
For $NaCl$ solution, $i=2$
$\therefore$ for $NaCl,\Delta T_b=2$