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canvas prints bottle canvas prints still life canvas prints chemicals canvas prints science canvas prints scientific canvas prints still-life canvas prints bottles canvas prints label canvas prints labels canvas prints green canvas prints yellow canvas prints ion canvas prints ions canvas prints fe2+ canvas prints fe3+ canvas prints

photographs bottle photos still life photos chemicals photos science photos scientific photos still-life photos bottles photos label photos labels photos green photos yellow photos ion photos ions photos fe2+ photos fe3+ photos

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Iron chlorides. Iron (II) chloride and iron (III) chloride contain iron (Fe) ions with different combining powers, as indicated by the oxidation state included in the names of the compounds. Both are soluble in water, but the Fe +3 ion forms a yellow colour in solution, whereas the colour formed by the Fe +2 ion is a pale green. This is due to the formation of complex hydrated ions in water, respectively the hexaaqua ion (6 water molecules) and the tetraaqua ion (4 water molecules). Acid equilibria and ionic effects lead to other ions and the colours observed, which get stronger with concentration.

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