Practice Pure Substance in Chemistry

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

A sample of matter with a fixed, definite composition. Either an element or a compound.

Every particle in a pure substance is the same. Pure water is all H₂O — no exceptions.

Example 1

easy
Distinguish between a pure substance and a mixture. Give two examples of each.

Example 2

medium
How can you determine whether a clear liquid is a pure substance or a mixture?

Example 3

easy
Is orange juice a pure substance or a mixture? Explain.

Example 4

hard
Both distilled water and steel are uniform in appearance and properties. Explain why distilled water is classified as a pure substance while steel is a mixture.
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