why brown layer has on iron nail so
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Nails are made of iron. When the nails rust, the iron forms a brown coat of iron rust which is hydrated iron(III) oxides Fe2O3·nH2O and iron(III) oxide-hydroxide (FeO(OH), Fe(OH)3).
When iron nails are placed in copper(II)sulphate soultion, a reddish layer of copper metal forms, coating the nails. This happens because of the single displacement reaction that occurs. Iron, which is more reactive than the copper metal, displaces the copper from the copper sulphate solution and forms ferrous sulphate which is green in color. The red-brown copper which is displaced from the solution is what coats the nails giving them that change in color
When iron nails are placed in copper(II)sulphate soultion, a reddish layer of copper metal forms, coating the nails. This happens because of the single displacement reaction that occurs. Iron, which is more reactive than the copper metal, displaces the copper from the copper sulphate solution and forms ferrous sulphate which is green in color. The red-brown copper which is displaced from the solution is what coats the nails giving them that change in color
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