Water of crystallization degree of hydration can be critical to the resulting chemical properties. For example, anhydrous RhCl is not soluble in water and is relatively useless in organometallic chemistry whereas RhCl•3HO is versatile. Similarly, hydrated AlCl is a poor Lewis acid and thus inactive as a catalyst for Friedel-Crafts reactions. Samples of AlCl must therefore be protected from atmospheric moisture to preclude the formation of hydrates. Crystals of hydrated copper(II) sulfate consist of [Cu(HO)] centers linked to SO ions. Copper is surrounded by six oxygen atoms, provided by two different sulfate groups and four molecules of water. A fifth water resides elsewhere
Water privatization in the United States subsidiary of the French company Suez Environment, American Water, and Siemens from Germany which acquired US Filter Corps from French Veolia Environment and runs it under the Siemens name. In "Water Privatization Trends in the United States: Human Rights, National Security, and Public Stewardship", Craig Anthony Arnold argues that there is a lack of incentive for private water companies to carry out improvements or maintenance in public water systems that will have lasting benefits beyond their contract term. There are other criticisms of privatization outside the classic argument of "public" versus "private", the most of fundamental example being the claim