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Question

Aqua regia is a mixture of:


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Solution

Aqua regia: It is a yellow-orange or red-colored fuming liquid.

  • Aqua regia is a mixture of concentrated Nitric acid (HNO3) and concentrated Hydrochloric acid (HCl) in the ratio of 1:3.

Uses of Aqua regia:

  • It can dissolve noble metals such as Gold (Au) and Platinum (Pt)
  • Aqua regia is mainly used for the manufacture of Chloroauric acid (HAuCl4)
  • It is used as an electrolyte in the Wohlwill process to refine gold to the purity of 99.999%.

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