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How is concentration expressed in mixtures?

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Concentration may be expressed in a number of ways. The simplest statement of the concentrations of the components of a mixture is in terms of their percentages by weight or volume. Mixtures of solids or liquids are frequently specified by weight percentage concentrations, such as alloys of metals or mixtures used in cooking, whereas mixtures of gases are usually specified by volume percentages. Very low concentrations may be expressed in parts per million (ppm), as in specifying the relative presence of various substances in the atmosphere.

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Similar questions: What are the different ways to express concentrations in chemistry? Are concentrations expressed the same across all mixtures? How do concentration designations differ according by the type of mixture? How do you indicate concentration in different types of mixtures? [ Hide these questions ]

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