Question

Ethylene glycol is a compound used in automotive antifreeze. It is odorless, colorless, and toxic if ingested. Adding ethylene glycol to water affects the freezing and boiling point. Two students predict the freezing point for 100% ethylene glycol. Andre predicts the freezing point will be less than that of 100% water. Jennifer predicts the freezing point will be about the same as 90% ethylene glycol in water. Which inference seems MOST plausible?

Answer 1

Answer: Andre. If it is used as an antifreeze, one would infer that it's freezing point is less than water.

Explanation:

The freezing point of ethylene glycol alone (100%) is -12.9oC. That is somewhat less than the freezing point of water but nowhere near the freezing point of water containing 70% ethylene glycol.