Homework Help: Chemistry

Posted by fdqed on Monday, November 23, 2009 at 11:42pm.

What volume of ethylene glycol (C2H6O2), a nonelectrolyte, must be added to 13.7 L of water to produce an antifreeze solution with a freezing point of -30.0∑C? (The density of ethylene glycol is 1.11 g/cm3, and the density of water is 1.00 g/cm3.)

Chemistry - DrBob222, Monday, November 23, 2009 at 11:57pm
It would help us if you used the same screen name for your posts.
delta T = Kb*molality
You know delta T. I assume you know Kb. Calculate molality.
Then molality = moles/molar mass
You know molality and molar mass of the glycol, calculate moles.
Then moles = grams/molar mass.
You know moles and molar mass, calculate grams.
Knowing mass and density, you can determine the volume.
mass = volume x density.

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