1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Freezing point

  1. Oct 23, 2005 #1
    What is the freezing point of radiator fluid that is 50% antifreeze by mass? for water is 1.86 .

    I used
    delta: K_fc_m
    First I found the molar mass of ethylene glycol to be 62.07 g/mol. Then I multiplied 1/62.06 by 500g/1 kg to get 8.06 mol/kg for cm. I plugged these values in and got 15 C. However it is incorrect. I then thought to say that -15C was the freezing point, this was also wrong.

    Please help!
  2. jcsd
  3. Oct 23, 2005 #2
    What's the other 50% of the radiator fluid?
  4. Oct 24, 2005 #3


    User Avatar

    Staff: Mentor

    Usually water.
    Last edited by a moderator: Aug 13, 2013
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook