An Aqueous Solution Has a Normal Boiling Point of 10

Multiple Choice

An aqueous solution has a normal boiling point of 10 3.0°C.What is the freezing point of this solution? For water K_b = 0.51°C /m and K_f = 1.86°C /m.

A) -0.82°C
B) - 3.0°C
C) -3.6°C
D) - 11°C