Exp 17 - Joseph Marcus July 20, 2009 Experiment 17:...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Joseph Marcus July 20, 2009 Experiment 17: Colligative Properties: Freezing Point Depression Introduction: The purpose of this experiment is to find the freezing point of a solvent and the depression of the freezing point as solute concentration is increased. The colligative properties of this experiment all depend on the number of solute particles in a solution. Adding non-volatile solute to a volatile solvent causes the boiling point to increase by lowering the vapor pressure of the solution (which causes an increased heat requirement for boiling). This is the boiling point elevation. This decreased vapor pressure also causes a decrease in the freezing point, which is referred to as the freezing point depression and depends on the concentration of the solute in the solvent. Eqtn 1: T f = -i K f m where: T f = (T f – T) T f is the lowered freezing point and T is the freezing point of the pure solvent i is the number of ions formed when dissolved K f is the proportionality constant determined by measuring
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/02/2009 for the course CHEM chem1C taught by Professor O'dea during the Spring '09 term at UCSB.

Page1 / 2

Exp 17 - Joseph Marcus July 20, 2009 Experiment 17:...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online