Ethylene glycol [CH2(OH)CH2(OH)] is a common automobile antifreeze. It is water-soluble and fairly nonvolatile (b.p. 197°C). Calculate (a) the freezing point and (b) the boiling point of a solution containing 685 g of ethylene glycol in 2075 g of water.

A. (a) -13.5°C, (b) 103.2°C
B. (a) -16.7°C, (b) 105.8°C
C. (a) -18.2°C, (b) 108.4°C
D. (a) -20.5°C, (b) 110.9°C