Question

Which of the following solutes, dissolved in 1000g of water, would provide a solution would the lowest freezing point?

.030 mol of BaCl2,
CO(NH2)2,
CaSO4,
CH3COOH,
or .030 mol of NH4NO3

Again, the steps needed to determine for the freezing point.


The solute with the lowest freezing point would be .030 mol of BaCl2. This is because BaCl2 has the highest freezing point depression of the five solutes, meaning that it will lower the freezing point of the solution the most. To calculate the freezing point of the solution, you would need to use the equation: Tf = Kf * m, where Tf is the freezing point of the solution, Kf is the freezing point depression constant for water, and m is the molality of the solution.

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