Hydrate compounds

Hydrate compounds that have water molecules as part of their chemical formula. This contributes to crystalline structure of the compound.

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In the picture above we have an example of a hydrate. The part of the formula in front of the dot is the anhydrous. The part behind the dot is the hydrate. The coefficient in front of the hydrate represents the moles present so in this compound there is one mole of water. When naming this compound we first take the hydrous, aluminum sulfate, and then put on the hydrate which is mono hydrate.

If you want to learn more about hydrates here are some helpful links
http://www.chem.purdue.edu/gchelp/nomenclature/hydrates_2009.htm
https://en.wikipedia.org/wiki/Hydrate