3.3

3.3 Mixtures of Matter

Mixtures

• Combination of 2 or more substances

• Mixed, not bonded together

• Can be separated physically

Heterogeneous Mixture

• Not-even blending• Examples:

– OJ with pulp– Milk– Dirty water– Oil/vinegar salad

dressing– fog

Homogenous Mixture

• Even blending• a.k.a. “solution”• Examples

– Gas-gas– Gas-liquid– Liquid-gas– Solid-liquid– Solid-solid

Separating Mixtures

• Each based on some physical property– Size of particles– Solubility– Boiling point– Melting point– Conductivity– Magnetism– Etc.

Filtration

• heterogeneous mixtures – sep. by size

• Best for solid in a fluid (liquid or gas)

Distillation

• Good for homogeneous solutions (if components have different boiling points)

Crystallization

• Form solid particles from a supersaturated solution

• Adding more substance to solution = crystals!

Sublimation

• Only works for substances that do this (at different temperatures)

Chromatography

• Size separation• Commonly used for

pigments

15. Classify the following as heterogeneous or homogeneous

• A. tap water

• B. air

• C. raisin muffin

17. Describe the separation technique that could be used

• A. two colorless liquids

• B. a nondissolving solid mixed with a liquid

• C. red and blue marbles of same size and mass