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Element gold dissolves in a mixture of HNO3 and HCL

Element gold dissolves in a mixture of HNO3 and HCL

Grade:Upto college level

1 Answers

Gaurav
askIITians Faculty 164 Points
7 years ago
Hello Student
Aqua regia dissolves gold, though neither constituent acid will do so alone, because, in combination, each acid performs a different task. Nitric acid is a powerful oxidizer, which will actually dissolve a virtually undetectable amount of gold, forming gold ions (Au3+). The hydrochloric acid provides a ready supply of chloride ions (Cl−), which react with the gold ions to produce tetrachloroaurate(III) anions, also in solution.

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