In order to prevent water from freezing in the instrument, glycerol can be added to lower its freezing point. If the freezing point needs to be lowered to 27 1K, how many grams of glycerol should be a
In order to prevent water from freezing in the instrument, glycerol can be added to lower its freezing point. If the freezing point needs to be lowered to 27 1K, how many grams of glycerol should be added to 100g water?
Solution: The molar mass of glycerol is 92 (g mol- 1).
According to δ TF = KF MM = 273? 27 1= 1.075 (mol kg-1)
1.86
The added ∴ glycerol is1.075× 92×100/1000 = 9.9g.