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
Sharing the water of the Ganges that India is drawing excessive water and the amount allocated to Bangladesh is unjust and insufficient. India in turn complains that the water allocated to Bangladesh leaves it with less water than necessary for the functioning of the Kolkata Port and the National Thermal Power Corporation in Farakka. Other critics have also stressed environmental reasons for India to reconsider its drawing of water at Farraka. Alarming increases in deforestation and erosion at the upper levels of the Ganges river increases the deposition of silt at the lower level, which is already measured at 2 million tonnes annually, along with increased