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.

Front

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 evenly distributed and not easily distinguishable. Examples include saltwater and air.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture where the components are not evenly distributed and can be easily distinguished. Examples include salad and soil.

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?

Back

An example of a homogeneous mixture is vinegar.

Front

What is an example of a heterogeneous mixture?

Back

An example of a heterogeneous mixture is a fruit salad.

Front

Which of the following is a pure substance: water, air, or soil?

Back

Water is a pure substance.

Front

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

Back

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