23.8-Chemistry+of+Selected+Transition+Metals

The dissolution of chromium in dilute hydrochloric or sulfuric acid will produce liberated hydrogen gas formed from the reduction of two aqueous hydrogen ions by the chromium atom, which is oxidized to the chromium(II) or chromous ion, which is **sky blue** in solution.
 * __Chromium__**

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 * __Iron__** [[image:http://www.53kk.tln.edu.ee/Chemtests/test09/Fe%28OH%293.jpg align="right" caption="Fe(OH)3"]]



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