Homework Help: Chemistry

Posted by Frank on Tuesday, September 14, 2010 at 6:58pm.

Calcium chloride has been used to melt ice from roadways. Given that the saturated solution is 32% calcium chloride by mass, estimate the freezing point. Express your answer in degrees Celsius. Assume that calcium chloride behaves ideally in solution.

Chemistry - DrBob222, Tuesday, September 14, 2010 at 7:58pm
32% CaCl2 means 32 g CaCl2/100 g soln or
32 g CaCl2 in 68 g water. The moles CaCl2 then is 32g/molar mass CaCl2
molality = moles CaCl2/0.068 kg.

delta T = i*Kf*m
i = 3. solve for delta T and convert to freezing point.
Chemistry - Anonymous, Sunday, February 3, 2013 at 5:39pm
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