Homework Help: AP Chemistry

Posted by Jana on Sunday, February 10, 2013 at 11:09pm.

0.015 moles of a compound are dissolved in 18 fl. oz. of water. At what temperature will the solution begin to freeze? The density of water is 1.00g/mL

AP Chemistry - DrBob222, Sunday, February 10, 2013 at 11:15pm
Convert 18 fl oz to grams and to kg. 1 oz = 28.35 grams.

molality = mols/kg solvent
Solve for molality.

Then delta T = Kf*m
You know Kf and m, solve for delta T, then subtract from zero C to find the new freezing point.

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