delta T = Kf*m
molality = mols/kg solvent.
I think the easy way to do this is to make up a number for the molar mass of the solute. It doesn't matter what number is used since it is the same in both solvents. I think 10 is a good number.
m for t-butanol is (0.27/10)/0.027 = 0.98 or so but you can do it more accurately.
Then m for cyclohexane is
(0.23/10)/0.0248 = 0.93 or so.
Which of those times Kf will produce the larger delta T value.If your prof is picky about significant figures you want to be careful with the explanation part and not use too many s.f.
two solutions are prepared using the same solute
solution a: 0.27g of the solute disolves in 27.4g of t-butanol
solution b: 0.23g of the solute disolves in 24.8g of cyclohexane
which solution has the greatest freesing point change? show calculations and explain.
1 answer
1 answer