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Question: Answered & Verified by Expert
0.5 molal solution of ethylene glycol in water is used as a coolant in car. If the freezing point depression constant of water is 1.86oCkg per mole, the mixture will freeze at
ChemistrySolutionsNEET
Options:
  • A 0.93oC
  • B -0.93oC
  • C 1.86oC
  • D -1.86oC
Solution:
2176 Upvotes Verified Answer
The correct answer is: -0.93oC
ΔTf=kf×m

=1.86×0.5=0.93oC

ΔTf= Tfo-Tf

Tf=Tfo-ΔTf

=0-0.93= -0.93oC

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