page_title: Hydration reaction
section_title: Inorganic and materials chemistry
hierarchical_section_title: Hydration reaction / Inorganic and materials chemistry
caption_attribution_description: Svenska: Kopparsulfat English: copper sulfate&#160;; mineral name: Chalcanthite Deutsch: Selbstgezüchteter Kupfer(II)sulfat-Pentahydrat-Kristall - CuSO4, 5 H2O&#160;; Mineralname: Chalkanthit Français&#160;: Cristal de sulfate de cuivre hydraté (CuSO4, 5 H2O)&#160;; Nom du minéral&#160;: Chalcantite Magyar: Réz-szulfát kristály
context_page_description: In chemistry, a hydration reaction is a chemical reaction in which a substance combines with water. In organic chemistry, water is added to an unsaturated substrate, which is usually an alkene or an alkyne. This type of reaction is employed industrially to produce ethanol, isopropanol, and butan-2-ol.
context_section_description: Hydration is an important process in many other applications; one example is the production of Portland cement by the crosslinking of calcium oxides and silicates that is induced by water. Hydration is the process by which desiccants function.
caption: CuSO4·5H2O is bright blue and has a rather different structure from its colourless anhydrous derivative.
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