1. Classifying Matter Pure Substances Mixtures Elements Compounds
Homogeneous
Heterogeneous

2. Distilled water Pure Substance

3. Heterogeneous Mixtures Characteristics Definition Separation
More than one PHASE – distinct layer with a uniform composition. Phases can be distinctly identified.
Colloid – suspended particles are too small to settle out. (Tyndall Effect)
Suspension – Suspended particles in this mixture will settle out.
Definition
Heterogeneous Mixture- A mixture where the components are visibly distinguishable
Heterogeneous
Examples
Suspensions
Oil and water – 2 phases
Salad dressing – water and vinegar = phase 1, oil = phase 2, seasoning = phase 3
Sand and water
Colloids
Blood Glue
Milk Fog
Separation
Filtration – separates a solid from a liquid by collecting the solid in a funnel and allowing the liquid to drain through the funnel into a flask. (suspensions)
Centrifugation – Separates particles in a mixture by particle size and density differences.

4. Centrifugation – Blood is a Heterogeneous Mixture

5. Homogeneous Mixtures Definition Characteristics Examples Separation
Components:
Solvent – dissolving fluid
Solute – substance that is dissolved
Solvation – the process where solvent molecules surround solute molecules.
Volumes are not additive
Homogeneous Mixture- A mixture where the components are spread evenly throughout.
Solution – Another name for a
homogeneous mixture!
Homogeneous
Examples
Water and alcohol
Koolaid (water and sugar)
14kt gold
(Alloys are homogeneous mixtures of metals!)
Coffee/Tea
Separation
Distillation/Evaporation- boiling off the solvent. The solute remains in the beaker.

6. Solubility Factors
What happens to alcohols’ solubility in water as the hydrocarbon portion of the alcohol molecules gets longer?

7. Water – Ethanol Interactions
Dissolving a solute in a solvent is favored when the interactions between the solute and solvent molecules are stronger than the solvent-solvent and solute-solute interactions.

8. Gold is an alloy