2.4 Mixtures of Matter

A substance that has a uniform and unchanging composition.

• A pure substance

• An impure substance.

• A mixture.

• Sand and water.

A physical blend of two or more pure substances in any proportion.

• Sodium chloride.

• A pure substance.

• Mixture.

• Distilled water.

Each pure substance retains its individual chemical properties in a mixture.

• True

• False

The composition of mixtures is fixed, and the number of mixtures that can be created by combining substances is finite.

• True

• False

Matter is classified as pure substances and mixtures.

• True

• False

Mixtures are physically combined and separated by physical processes based on differences in the chemical properties of the substances

• True

• False

What is a heterogeneous mixture?

• A mixture that has a uniform composition

• A mixture whose composition is not uniform

• A mixture that can be separated by physical processes

A heterogeneous mixture always has ............................................................................................

• more than one phase.

• one phase.

• two phases.

What is a homogeneous mixture?

• A mixture that has a uniform composition

• A mixture whose composition is not uniform

• A mixture that can be separated by physical processes

It always has a single phase

• Heterogeneous mixture.

• Homogeneous mixture.