Chemistry

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Redox Reactions

Can anyone help predict the reaction that will take place when Gold is put into a solution of Hydrochloric Acid?

  • Chemistry -

    zilch. no reaction.
    Au is below hydrogen in the activity series; therefore, gold will not replace hydrogen ion from an acid such as HCl. Au will dissolve in Aqua Regia (royal water) which is a mixture of HCl and HNO3. The HNO3 serves as an oxidizing agent, some gold ions form, and they are then bound up in AuCl4^- complex ions which shifts the reaction to the right and that allows more Au to be oxidized by HNO3.

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