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Hydrate



Hydrate, any of various chemical compounds composed of water and some other substance. Common hydrates include blue vitriol (CuSO45H2O) and Glauber's salt (Na2CO310H2O). As water evaporates, most hydrates change structure. Water that is retained by the hydrate is known as water of crystallization or hydration. Hydrates that have lost all water are called anhydrous.



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21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Humber, River to Indus Valley civilization