Pure Substances vs Mixtures

Front

What are pure substances?

Back

Pure substances are materials that have a uniform and definite composition. They can be elements or compounds.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances where each substance retains its own properties.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout, such as saltwater.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is one that does not have a uniform composition, such as a salad.

Front

What are suspensions?

Back

Suspensions are mixtures in which the particles are too large to stay mixed without being stirred or shaken.

Front

What are colloids?

Back

Colloids are mixtures where very small particles of one substance are evenly distributed throughout another substance.

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 chemically bond together, while a mixture is a physical combination of substances.

Front

What is a solution?

Back

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