Pure Substances vs. Mixtures

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout. It can be an element or a compound.

Front

What is a mixture?

Back

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

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout. The individual components are not distinguishable.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture where the individual components can be seen and are not uniformly distributed.

Front

Give an example of a pure substance that is an element.

Back

Oxygen (O) is an example of a pure substance that is an element.

Front

Give an example of a pure substance that is a compound.

Back

Water (H2O) is an example of a pure substance that is a compound.

Front

What is the difference between a compound and a mixture?

Back

A compound is a substance formed when two or more elements are chemically bonded together, while a mixture is a physical combination of substances.

Front

Is saltwater a pure substance or a mixture?

Back

Saltwater is a mixture.

Front

What can be inferred about a liquid with a long list of ingredients on its label?

Back

It is likely a homogeneous mixture.

Front

What is the definition of a compound?

Back

A compound is a substance formed when two or more elements are chemically combined in a fixed ratio.