Freezing point depression - Caitlyn Adams Final Project...

This preview shows page 1 - 2 out of 2 pages.

Caitlyn Adams Final Project Chem II Introduction: Freezing point depression is the lowering of the freezing point of a solvent by adding a solute. It is colligative property which means that the amount of solute particles, and not the specific solute present, determines the degree to which the freezing point is depressed.The mathematical expression for the freezing point depression is, ∆T = ikfm . In this expression i is the van’t Hoff factor and kf is the freezing point depression constant for a solvent, where m is the molality. The molality formula, moles of solute over kilograms of solvent. Note that the freezing point depression for water is 1.86 degrees Celsius/m. The van’t Hoff factor is the number of particles in a given solution. Since ionic compounds form several aqueous ions, the theoretical van’t Hoff factors are integers greater than one. In this case, the theoretical van’t hoff factor of acetic acid nickel salt is 3. For covalent compounds, like sugar, that

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture