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Nitric acid oxidizes the steel to +three ions, but only in moment quantities, usually undetectable during the pure acid because of the chemical equilibrium of your reaction. Nevertheless, the ions are removed from the equilibrium by hydrochloric acid, forming AuCl−4 ions, or chloroauric acid, therefore enabling additional oxidation: The gold https://franciscowbfjn.wikissl.com/796602/indicators_on_zahngold_you_should_know

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