Pure Substances vs Mixtures

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What is a pure substance?

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A pure substance is a material that has a constant composition and consistent properties throughout. Examples include elements and compounds.

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What is a mixture?

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A mixture is a combination of two or more substances that are not chemically bonded. Each substance retains its own properties.

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What is a homogeneous mixture?

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A homogeneous mixture is a mixture that has a uniform composition and appearance throughout. Examples include saltwater and air.

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What is a heterogeneous mixture?

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A heterogeneous mixture is a mixture where the components are not uniformly distributed, and different parts can be seen. Examples include salad and pizza.

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What are colloids?

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Colloids are mixtures where tiny particles of one substance are evenly distributed throughout another substance. Examples include milk and fog.

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What are suspensions?

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Suspensions are mixtures in which particles are dispersed throughout a liquid or gas but are not dissolved. Examples include muddy water.

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What is a solution?

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A solution is a homogeneous mixture where one substance (the solute) is dissolved in another (the solvent). Examples include sugar in water.

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What is the difference between a compound and a mixture?

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A compound is a substance formed when two or more elements are chemically bonded together, while a mixture is a physical combination of substances.

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What is an example of a pure substance?

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Examples of pure substances include distilled water and table salt (sodium chloride).

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What is the significance of the term 'uniform' in mixtures?

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'Uniform' refers to the consistent composition and appearance of a homogeneous mixture, meaning it looks the same throughout.