The French use the word chateau for castle but it used to cover both: the Chateau-Gaillard, a fortress of the 12th century; and the manors dating from the 12th to the 18th century, which have no or little defensive capability.he French use the word chateau for castle but it used to cover both: the Chateau-Gaillard, a fortress of the 12th century; and the manors dating from the 12th to the 18th century, which have no or little defensive capability.
Hydrate, any compound containing water in the form of H2O molecules, usually, but not always, with a definite content of water by weight. The best-known hydrates are crystalline solids that lose their fundamental structures upon removal of the bound water.
The water molecules are part of the crystalline structure and are weakly bonded to the ions or molecules that make up the compound. Such compounds are known as hydrates, meaning that they contain water. The solid that remains when the water is removed is referred to as the anhydrous salt, or anhydrate.Hydrate + Heat (Anhydrate + H2O. Usually, the amount of water present in a hydrate is in a whole number molar ratio to the moles of anhydrate.he water molecules are part of the crystalline structure and are weakly bonded to the ions or molecules that make up the compound. Such compounds are known as hydrates, meaning that they contain water. The solid that remains when the water is removed is referred to as the anhydrous salt, or anhydrate.