10 What is the freezing point of a solution containing 310 g

10. What is the freezing point of a solution containing 3.10 grams benzene (78.11 g/mol) dissolved in 32.0

grams paradichlorobenzene ? The freezing point of pure paradichlorobenzene is 53.0

Solution

molality = (3.1/78.11)*(1000/32) = 1.24

deltaT = -7.1*1.24 = -8.8 C

freezing point = 53 - 8.8 = 44.2 C