Homework Help: Chemistry

Posted by Cecilia on Saturday, August 21, 2010 at 10:00pm.

What is the freezing point of a solution made by dissolving 450 g of ethylene glycol (C2H6O2) in 550 g of water? The freezing point of pure water is 0.0慢 and Kf of pure water is -1.86慢/m.

Chemistry - DrBob222, Saturday, August 21, 2010 at 10:02pm
moles ethylene glycol = grams/molar mass.
Solve for moles.

m = moles solute/kg solvent
Solve for m

delta T = Kf*m
solve for delta T, then for T.

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