1. Chapter 11 Mixtures
Mixtures

2. Classifying Substances
All substances are classified into one of two groups:
Pure substances
Mixtures
Pure substances are made of particles that are all exactly the same. Eg. Gold
Pure substances can go through a physical change without the substance changing to a different substance.
A Mixture is a physical combination of two or more substances.

3. Solutions A solution is a mixture of a solvent and a solute.
A Solute dissolves in a solvent to form a solution
Eg. Sugar
A solvent is a substance in which a solute dissolves
Eg. water

4. Alloys
A mixture of metals is called an alloy eg. Sterling silver is a mixture of silver and copper.
Soluble - A substance that dissolves in a solvent is soluble e.g. sugar in water.
Insoluble – A substance that does not dissolve in a solvent e.g. sugar in cooking oil.

6. Dilute Solution – A dilute solution contains a small
amount of solute in a certain volume of solvent.
E.g. dilute Ribena
Concentrated Solution – A concentrated solution
contains a large amount of solute in a certain volume
of solvent E.g. strong Ribena
You can make a solution more concentrated by either:
Adding in more solute
Decreasing the amount of solvent

7. Saturated solution – When no more solute will dissolve in a solution
Saturated solution – When no more solute will dissolve in a solution. If you increase the temperature of the Solution more solute will dissolve. A suspension is a mixture of a liquid and tiny bits of an insoluble solid e.g. muddy water

8. Decanting – a method of separating an insoluble solid from a liquid. E
Decanting – a method of separating an insoluble solid from a liquid. E.g. separating sand from water Filtration – method used to separate an insoluble solid from a liquid.

11. Evaporation – This method is used if you wish to separate a soluble solid from a liquid. E.g. salt from water