We’re being asked to determine the freezing point and boiling point of an aqueous Na_{2}SO_{4} solution. Aqueous means that Na_{2}SO_{4} was dissolved in water.

When calculating the freezing point of a solution, we’re going to use the Freezing Point Depression equation. On the other hand, when calculating for the boiling point of a solution we’re going to use the Boiling Point Elevation equation.

**Freezing Point Depression:**

∆T_{f} = change in freezing point = T_{f pure solvent} –T_{f solution}

K_{f} = freezing point depression constant

i = van' t Hoff factor of the solute = no. of ions

m = molality

**Boiling Point Elevation:**

Assuming 100% dissociation, calculate the freezing point and boiling point of 2.96 m Na_{2}SO_{4}(aq).

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