6.6B Pure Substances and Mixtures

Front

What is a pure substance?

Back

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?

Back

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

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the components are uniformly distributed and cannot be distinguished from one another. Example: saltwater.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture in which the components are not uniformly distributed and can be easily distinguished. Example: salad.

Front

Can you see the individual parts in a homogeneous mixture?

Back

No, in a homogeneous mixture, the individual parts are not visible.

Front

Can you see the individual parts in a heterogeneous mixture?

Back

Yes, in a heterogeneous mixture, the individual parts are visible.

Front

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.

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What is the difference between a pure substance and a mixture?

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A pure substance has a uniform and definite composition, while a mixture contains two or more substances that retain their individual properties.

Front

What is a solution?

Back

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