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| Keywords: Coloured-transition-metal-solutions.jpg en From left to right aqueous solutions of cobalt II nitrate Co NO<sub>3</sub> <sub>2</sub> red ; potassium dichromate K<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub> orange ; potassium chromate K<sub>2</sub>CrO<sub>4</sub> yellow ; nickel II chloride NiCl<sub>2</sub> green ; copper II sulfate CuSO<sub>4</sub> blue ; potassium permanganate KMnO<sub>4</sub> violet fr De gauche à droite des solutions aqueuses de nitrate de cobalt II Co NO<sub>3</sub> <sub>2</sub> rouge ; dichromate de potassium K<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub> orange ; chromate de potassium K<sub>2</sub>CrO<sub>4</sub> jaune ; chlorure de nickel II NiCl<sub>2</sub> vert ; sulfate de cuivre II CuSO<sub>4</sub> bleu ; permanganate de potassium KMnO<sub>4</sub> violet 2007-04-27 own assumed Benjah-bmm27 derivative works potassium-dichromate-solution png potassium-permanganate-solution png Liquid solution Transparent Liquid solution in blue Liquid solution in pink Blue liquid Liquid solution in red Liquid solution in yellow Pink liquid Blue green orange purple red yellow Taken with Nikon D50 | ||||
