Pure Substances vs Mixtures Pure Substances A pure substance is a substance that is made up of only one type of atom or molecule. For example, table sal...
Pure Substances vs Mixtures
Pure Substances
A pure substance is a substance that is made up of only one type of atom or molecule. For example, table salt (NaCl) is a pure substance because it is composed of only sodium and chlorine atoms. Pure substances have a consistent chemical composition and properties, regardless of the amount of substance present.
Mixtures
A mixture is a substance that is made up of two or more types of atoms or molecules that are not chemically bonded together. For example, a mixture of sand and water is a mixture because the sand and water atoms are not chemically bonded together. Mixtures do not have a consistent chemical composition and properties, and their components can vary depending on the amount of each component present.
Examples
Pure Substance: Sodium chloride (NaCl)
Mixtures: A mixture of sand and water, a mixture of coffee and sugar, and a mixture of oil and water
Differences between Pure Substances and Mixtures
| Feature | Pure Substance | Mixture |
|---|---|---|
| Composition | Only one type of atom or molecule | Two or more types of atoms or molecules |
| Chemical composition | Consistent | Can vary |
| Properties | Consistent | Can vary |
| Example | Sodium chloride | A mixture of sand and water |