Homework Help: Chemistry

Posted by Jaden on Friday, May 28, 2010 at 12:28am.

Assuming complete dissociation of the solute, how many grams of KNO3 must be added to 275 mL of water to produce a solution that freezes at -14.5 C? The freezing point for pure water is 0.0 C and Kf is equal to 1.86 C/m.

* Use Tf = Kf*i*m

Chemistry - bobpursley, Friday, May 28, 2010 at 8:27am
i=2

m=gramsKNO3/(molmassKNO3*.275)

find grams KNO3 from your fourmula.

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