Cobalt chloride complexes

Cobalt chloride complexes

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Caption: Cobalt chloride complexes. Two cobalt chloride (CoCl2) solutions in test tubes. On the right is a 0.5 M water solution. Cobalt ions are complexed with water ((Co(H2O)6)2+) resulting in pink-red colour. On the left, concentrated hydrochloric acid has been added to the water solution. Cobalt ions are complexed with chloride ions ((CoCl4)-) and the solution colour changes to blue.

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Keywords: chemical, chemistry, chloride, cobalt, cobalt chloride, complex, compound, container, demonstration, equilibrium, glassware, h2o, hydrochloric acid, laboratory, liquid, salt, science, solute, solution, solvent, still life, test tube, transition metal, water

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