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