Heterogeneous or Homogeneous Mixtures - Concept Review

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What is a heterogeneous mixture?

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A heterogeneous mixture is a combination of two or more substances that are not uniformly distributed, meaning the different components can be seen and separated easily. Example: salad.

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What is a homogeneous mixture?

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A homogeneous mixture is a mixture that has a uniform composition throughout, meaning the different components are not easily distinguishable. Example: saltwater.

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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. It can be an element or a compound.

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What is an element?

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An element is a pure substance that cannot be broken down into simpler substances by chemical means. Example: gold (Au).

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What is a compound?

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A compound is a pure substance formed when two or more elements are chemically bonded together. Example: water (H2O).

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Is sugar a pure substance or a mixture?

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Sugar is a pure substance and specifically a compound.

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Is brass a pure substance or a mixture?

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Brass is a homogeneous mixture, specifically an alloy of copper and zinc.

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Is a taco a homogeneous or heterogeneous mixture?

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A taco is a heterogeneous mixture because its components (like meat, cheese, and vegetables) are not uniformly distributed.

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What is an example of a homogeneous mixture?

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An example of a homogeneous mixture is vinegar.

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What is an example of a heterogeneous mixture?

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An example of a heterogeneous mixture is a bowl of cereal with milk.