Addition Compound

Compound contains two or more simpler compounds that can be packed in a definite ratio into a crystal.

A dot is used to separate the compounds in the formula.

For example, ZnSO4·7H2O is an addition compound of zinc sulphate and water. This represents a compound, and not a mixture, because there is a definite 1:7 ratio of zinc sulphate to water in the compound.

Hydrates are a common type of addition compound.


See also: Compound.

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Subjects: Chemistry