Hydrated Compounds

Recently in class, we learned about a new topic: hydrated compounds. They have water molecules as a part of their chemical formula. These contribute to the crystalline structure of the compound, as seen below:

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Here is a website with an easy to understand, yet very detailed description of hydrated compounds: Properties of hydrates

Hydrated compounds are different than anhydrides, which were once hydrated.

Here are some examples of how to name hydrated coumpounds:

-CaSO4 x 2H2O = Calcium sulfate dihydride

-MgSO4 x 7H2O = Magnesium sulfate heptahydride

-FeCl2 x 4H2O = Iron (II) chloride tetrahydride

Here is a helpful website that I found that describes how the nomenclature of hydrated compounds works: Naming hydrates

When you heat a hydrated compound, it gets rid off the water in it, and changes the chemical structure of the substance and its appearance, as seen below:

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