1. Concentration and Solubility

2. Learning Goals / Success Criteria
describe the concentration of a solution in qualitative and quantitative terms.
describe the difference between saturated and unsaturated solutions.
Key terms: concentrated solution, dilute solution, concentration, saturated solution, unsaturated solution

3. Concentration and Solubility
The words “concentrated” and “dilute” are used to describe how much solute is in a certain volume of solution.
Concentrated solution: a solution with a large number of solute particles in a given volume of solution
Dilute solution: a solution with a small number of solute particles in a given volume of solution

4. Concentration and Solubility

5. Calculating Concentration
Concentration: the amount of solute present in an amount of solution
The more solute dissolved, the greater the concentration.
This concentration can be expressed in mathematical terms:
Suppose 100ml of solution contains 5.0g of sugar. The concentration of sugar in that solution is 5.0g/100ml (a ratio!).

6. Calculating Concentration
The following is the equation for calculating concentration:
Concentration = mass of solute in grams
ml of solution
Practice: Suppose a solution contains 6.0g of sugar in 200ml of solution. What is the concentration of the sugar and water?

7. Saturated and Unsaturated Solutions
What would happen if you were mixing Kool-Aid and you kept adding drink powder?
Eventually, no more powder would dissolve and the solution would be saturated.
Saturated solution: a solution in which no more solute can dissolve
Unsaturated solution: a solution in which more solute can be dissolved

8. Solubility
We now know there is a limit to the amount of solute that can dissolve in a solvent. Chemists call this amount solubility.
Solubility: a measure of how much solute can dissolve in a solvent to form a saturated solution at a particular temperature and volume.
Different solutes have different solubilities and different factors affect solubility