Homework Answers
Answer : - 37.2 oC
mass of ethylene glycol = 620.0 g
moles of ethylene glycol = 620 / 62.07 = 9.99
mass of water = 500 g = 0.5 kg
molality = moles / mass of solvent
= 9.99 / 0.5
molality = 19.98 m
delta Tf = Kf x m
0 - Tf = 1.86 x 19.98
Tf = - 37.2
freezing point = - 37.2 oC
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