Question

The boiling point of a $0.1M$ solution of $CaC{l}_2$ should be elevated by:

• A. exactly ${0.51}^{\circ }$
• B. somewhat less than ${1.02}^{\circ }$
• C. exactly ${1.02}^{\circ }$
• D. somewhat less than ${1.53}^{\circ }$

Answer 1

The correct option is D somewhat less than ${1.53}^{\circ }$

For dilute solution, molarity is approximately equal to molality

The elevation in the boiling point $\Delta T_b=i\times K_b\times m=3\times 0.52\times 0.1={0.156}^{o}C$

Hence, the boiling point of a $0.1$ M solution of $CaC{l}_2$ should be elevated by ${0.156}^{o}C$