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COPPER SULPHATE
Copper(II) sulfate, also known as copper sulphate, is an inorganic compound with the chemical formula CuSO4. It forms hydrates CuSO4·nH2O, where n can range from 1 to 7. The pentahydrate (n = 5), a bright blue crystal, is the most commonly encountered hydrate of copper(II) sulfate. Older names for the pentahydrate include blue vitriol, bluestone,[10] vitriol of copper,[11] and Roman vitriol.[12] It exothermically dissolves in water to give the aquo complex [Cu(H2O)6]2+, which has octahedral molecular geometry. The structure of the solid pentahydrate reveals a polymeric structure wherein copper is again octahedral but bound to four water ligands. The Cu(II)(H2O)4 centers are interconnected by sulfate anions to form chains.[13] Anhydrous copper sulfate is a light grey powder.
Cooper Sulphate as a fungicide and herbicide ?
Copper sulfate has been used for control of algae in lakes and related fresh waters subject to eutrophication. It “remains the most effective algicidal treatment”. Bordeaux mixture, a suspension of copper(II) sulfate (CuSO4) and calcium hydroxide (Ca(OH)2), is used to control fungus on grapes, melons, and other berries.[23] It is produced by mixing a water solution of copper sulfate and a suspension of slaked lime. A dilute solution of copper sulfate is used to treat aquarium fishes for parasitic infections,[24] and is also used to remove snails from aquariums and zebra mussels from water pipes.[25] Copper ions are highly toxic to fish, however. Most species of algae can be controlled with very low concentrations of copper sulfate.