Solutions and Solubility

1
Solutions and Solubility

• Experiment 10

2
Solutions

• A solution is a homogenous mixture!

3
Solubility

• The solubility is the amount of solute needed to
  reach a state of equilibrium between a saturated
  solution and undissolved solute.

4
Solubility

• Solubility can be general or have a specific
  numerical value.
• The solubility of a substance is generally given
  as the number of grams of the substance that will
  dissolve in 100g of the solvent at a given
  temperature.

5
Gases in Liquids

• Each gas will have a different solubility for the
  same liquid, meaning that the solubility of a gas
  in a given liquid is a property of the gas.
• Solubility of a gas will decrease as the
  temperature of the solution increases.

6
Liquids in Liquids

• The solubility of liquids in liquids follows the
  general rule like dissolves like.
• Two polar substances will be miscible in each
  other and two nonpolar substances will be
  miscible in each other.
• A nonpolar substance and a polar substance will
  be immiscible in each other.
• You need to be able to evaluate if a substance is
  polar or nonpolar (chem 1411).

7
Solids in Liquids

• How quickly or slowly a solute dissolves in a
  solvent is not related to the solutes
  solubility.
• Grinding a solute, shaking or stirring a mixture,
  and sometimes heating a mixture can help speed
  the rate at which the solute dissolves.

8
Procedure Notes

• Everyone will do all of part 3.
• Part 1 we will talk about and part 2 was covered
  in chem 1411.
• For part 3C make sure your test tube is dry
  before you begin and that you have enough water
  to cover the contents in your test tube.
• All solutions may go down the drain.