3.3
TRANSCRIPT
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