Arrange the following aqueous solutions in order of increasing boiling point: a. 0.06 m FeCl 3(i

step 1 So the formula that describes boiling point elevation is that delta t, sub b for boiling point,

Arrange the following aqueous solutions in order of...

Key Concepts

Boiling Point Elevation

Boiling point elevation is a colligative property where the boiling point of a solvent increases when a non-volatile solute is added. The magnitude of the boiling point elevation depends on the number of solute particles in the solution, regardless of their identity, meaning that more solute particles will result in a higher boiling point compared to the pure solvent.

Colligative Properties

Colligative properties are properties of solutions that depend only on the number of solute particles present and not on their chemical nature. These properties include boiling point elevation, freezing point depression, vapor pressure lowering, and osmotic pressure, and they arise from the way solute particles disrupt the physical behavior of the solvent.

van't Hoff Factor

The van't Hoff factor, typically represented as i, is a measure of the number of particles into which a solute dissociates in solution. For electrolytes, this factor can be greater than one because the solute dissociates into multiple ions. It is crucial in calculating colligative properties because it indicates the effective concentration of particles that influence the boiling point or freezing point of the solution.

Molality

Molality is a concentration unit defined as the number of moles of solute per kilogram of solvent. Unlike molarity, molality is independent of temperature because it is based on mass rather than volume. This property makes molality particularly useful in calculations involving temperature-dependent colligative properties such as boiling point elevation and freezing point depression.

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