Pure Substances and Mixtures Flashcard

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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 properties throughout. It cannot be separated into simpler substances by physical means.

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What is a mixture?

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A mixture is a combination of two or more substances where each substance retains its own properties. Mixtures can be homogeneous or heterogeneous.

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What is a homogeneous mixture?

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A homogeneous mixture is a mixture in which the components are uniformly distributed and cannot be easily distinguished. 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 individual substances can be seen. Examples include salad and sand.

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What is the state of matter where molecules are close together but can slide past each other?

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Liquid.

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Can a pure substance be broken down into simpler substances using physical methods?

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No, a pure substance cannot be broken down into simpler matter using physical methods.

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What is an example of a heterogeneous mixture?

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An example of a heterogeneous mixture is a salad, where different ingredients can be seen and separated.

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What is an example of a homogeneous mixture?

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An example of a homogeneous mixture is a solution, like sugar dissolved in water, where the components are evenly mixed.

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What is a solution?

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A solution is a type of homogeneous mixture where one substance (the solute) is dissolved in another (the solvent).

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What is a compound?

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A compound is a substance formed when two or more elements chemically bond together. It has a fixed composition and properties.