Question

What is the function of HCl in the preparation of aqua regia?
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Answer 1

Answer:

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Nitric acid will act as the oxidizer and is used to form gold ions (Au3+). The hydrochloric acid is then used to react with the gold ions to form tetrachloroaurate(III) anions. The gold ions can then be removed from the solution which further allows the oxidation of gold.

Answer 2

Answer:

Hydrochloric acid, also known as muriatic acid, is an aqueous solution of hydrogen chloride. It is a colorless solution with a distinctive pungent smell. It is classified as a strong acid. It is a component of the gastric acid in the digestive systems of most animal species, including humans.

Explanation:

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