Question

In comparisons to a $0.01$M solution of glucose, the depression in freezing point of a $0.01MMgCl_{2}$ solution is

• A. The same
• B. About twice
• C. About three times
• D. About six times

Answer 1

Answer: (C)

About three times

Answer 2

$\Delta T_{f} = iK_{f}m$

For glucose i = 1

For $MgCl_{2},i = 3$

Thus, the depression in freezing point $(\Delta T_{f})$ of a $0.01$M $MgCl_{2}$ solution is abut three time of that of $0.01M$glucose solution