Osmotic Pressure The net movement of solvent is always toward the solution with

# Osmotic pressure the net movement of solvent is

This preview shows page 17 - 21 out of 21 pages.

Osmotic Pressure The net movement of solvent is always toward the solution with the higher solute concentration. The flow of solvent to the solution increases the height of the column. The column exerts pressure on the membrane to cause more solvent particles in the solution to pass to the pure solvent side. When the rate of flow of solvent particles are in equilibrium between the two sides the volume of the solution stops increasing.
Freezing Point Depression and Boiling Point Elevation Boiling Point Elevation • ∆T b =mk b (for water k b =0.51 o C/m) Freezing Point Depression • ∆T f =mk f (for water k f =1.86 o C/m) Note : m is the molality of the particles , so if the solute is ionic, multiply by the #of particles it dissociates to.
Which is more effective for lowering the freezing point of water? • NaCl or CaCl 2
Example 1: Find the new freezing point of 3m NaCl in water.
Example 2: Find the new boiling point of 3m NaCl in water.

#### You've reached the end of your free preview.

Want to read all 21 pages?

• Fall '16