· H2O

Usage

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It accepts one unnamed parameter that can give multiples:

{{Hydrate|2|nolink=yes}} gives · 2 H2O. However, if a link is not wanted, it is preferable to just lump the whole formula into {{chem2}}: {{chem2|CuSO4 * 5 H2O}}CuSO4 · 5 H2O.