Pure Substances & Mixtures

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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, meaning the different components are not distinguishable.

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What is a heterogeneous mixture?

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A heterogeneous mixture is a mixture that does not have a uniform composition and structure throughout, meaning the different components can be easily distinguished.

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What is an example of a homogeneous mixture?

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An example of a homogeneous mixture is saltwater, where the salt is completely dissolved in the water.

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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 the individual ingredients can be seen and separated.

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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, such as 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 and can be separated by physical means.

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How can mixtures be separated?

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Mixtures can be separated using physical properties such as filtration, distillation, or evaporation.

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What is a compound?

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A compound is a substance formed when two or more different types of atoms are chemically bonded together.

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Can compounds be separated by physical means?

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No, compounds cannot be separated into their individual components by physical means; they require chemical reactions to break the bonds.

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What is air classified as?

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Air is classified as a mixture because it contains various gases that are not chemically bonded.