Pure Substances & Mixtures

Front

What is a pure substance?

Back

A pure substance is a material that is made up of only one type of particle, which can be either an element or a compound.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.

Front

What is the difference between a homogeneous mixture and a heterogeneous mixture?

Back

A homogeneous mixture has a uniform composition throughout, while a heterogeneous mixture has a non-uniform composition with distinct phases.

Front

Give an example of a homogeneous mixture.

Back

An example of a homogeneous mixture is saltwater.

Front

Give an example of a heterogeneous mixture.

Back

An example of a heterogeneous mixture is a salad.

Front

What is a solution?

Back

A solution is a homogeneous mixture where one substance (the solute) is dissolved in another (the solvent).

Front

What type of mixture is air classified as?

Back

Air is classified as a homogeneous mixture.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together.

Front

Is carbon dioxide (CO2) a pure substance or a mixture?

Back

Carbon dioxide (CO2) is a pure substance because it consists of only one type of molecule.

Front

What are the components of a solution?

Back

A solution consists of a solute (the substance being dissolved) and a solvent (the substance doing the dissolving).