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Matter : Separating Mixtures. Separating Mixtures. Differences in physical properties can be used to separate mixtures. Some can be separated easily by physical means: rocks and marbles, iron filings and sulfur (use magnet) . Separating Mixtures. Heterogeneous Mixtures
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Separating Mixtures • Differences in physical properties can be used to separate mixtures. • Some can be separated easily by physical means: rocks and marbles, iron filings and sulfur (use magnet)
Separating Mixtures • Heterogeneous Mixtures • Filtration – separates by size • Homogeneous Mixtures • Distillation – separates by boiling point • Crystallization – evaporation to form crystals • Chromatography – flow along a stationary substance
Separating Mixtures • Filtration • Separates a solid from the liquid in a heterogeneous mixture (by size)
Separating Mixtures • Distillation: • Homogeneous Mixtures • takes advantage of different boiling points.
Separating Mixtures • Crystallization • Technique to separate solid from liquids • Process of formation of solid crystals from a homogeneoussolution.
Separating Mixtures • Chromatography • Separates homogeneous mixtures • Components of dyes such as ink may be separated by paper chromatography.
Separation of a Compound • Electrolysis • Separation of compounds into their elements • Chemical change, especially decomposition, produced in an electrolyte by an electric current • 2H2O 2H2 + O2