Mixtures - Types and Separation
Learning about mixtures and how their components can be separated.
Core concept
The method used to separate a mixture depends on the properties of its components — magnetic separation works for mixing magnetic materials like iron filings with non-magnetic ones like sand; filtration separates insoluble solids from liquids; and distillation separates a homogeneous mixture like saltwater into its pure components. Unlike compounds, mixtures do not have a fixed composition — you can mix salt and water in varying proportions and still have 'salt water,' just more or less concentrated.
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Quick notes
• A mixture is a physical combination of substances, unlike a compound (a chemical combination).
• Homogeneous mixtures (like salt water) have uniform composition; heterogeneous mixtures (like sand and stones) do not.
• Separation methods depend on the properties of components (magnetism, solubility, etc.).
• Mixtures do not have a fixed composition ratio, unlike compounds.