Separating Mixtures: Filtration: Uses a porous barrier to separate

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Presentation transcript:

Separating Mixtures: Filtration: Uses a porous barrier to separate a solid (undissolved) from a liquid. Examples: Sunflower seeds and water. Black pepper and water. Solid wastes and water.

Tro's "Introductory Chemistry", Chapter 3 Filtration Tro's "Introductory Chemistry", Chapter 3

Separating Mixtures: Decantation: To separate immiscible liquids (different densities) or a solid which is settled at the bottom of a liquid. Examples: Sand & water. Small rocks & and water. Oil and water. Diesel & water. Oil & vinegar. Use a separatory funnel.

Separatory funnel.

Separating Mixtures: Vaporization: A solid dissolved in a liquid (we want to collect the solid only). Examples: Salt dissolved in water.

Separating Mixtures: Distillation: Is based on differences in the boiling points (two liquids or liquid + solid dissolved) and you want to recover both. Examples: Salt dissolved in water. Alcohol dissolved in water.

Tro's "Introductory Chemistry", Chapter 3 Distillation Tro's "Introductory Chemistry", Chapter 3

Separating Mixtures: Chromatography: To separate the components of the ink spread through the paper at different rates (chromatography paper).

Separation of Mixtures Centrifugation and decanting Density Evaporation Volatility Chromatography Adherence to a surface Filtration State of matter (solid/liquid/gas) Distillation Boiling point Technique Different Physical Property Tro's "Introductory Chemistry", Chapter 3