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Several ways to do that. One way is adding hydrochloric acid and vaporizing

to initial volume. That action causes nitric acid (from the aqua regia) to go out.

Repeat this action 3 times. Now add copperas - ferrous sulphate dissolved in

hydrochloric acid 15%. The gold will precipitate. You can wash it if necessary

1stly in hot hydrochloric acid, 2ndly water, 3rdly ammoniak, 4thly water.

The resulting gold should be at least 99%

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13y ago

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Related Questions

What evidence indicates that there is a reaction between gold and aqua regia?

The solution will heat up.


Can aqua regia dissolve gold?

Yes, aqua regia can dissolve gold. Aqua regia is a mixture of nitric acid and hydrochloric acid that is able to dissolve gold and other noble metals.


How do you dissovle gold?

Aqua Regia will dissolve gold. Aqua Regia is a mixture of Nitric acid and Hydrochloric acid.


Will Aqua regia dissolve quartz rock to recover gold?

Aqua regia will dissolve gold. It will not dissolve quartz rock.


What happened when gold is cleaned by aqua regia?

Nobody would clean gold using aqua regia - it dissolves the gold, which is the last thing you'd want to do.


What solution will dissolves the metal gold?

Aqua regia (mixture of concentrated nitric acid and hydrochloric acid). However, nitric acid and hydrochloric acid by themselves don't dissolve gold.


Can you use hydrazine hydrate to recover gold from aqua regia?

Yes, hydrazine hydrate can be used to recover gold from aqua regia. It acts as a reducing agent to precipitate the gold out of solution. However, it is important to handle hydrazine hydrate with caution due to its toxicity and flammability.


Does aqua regia dissolve diamond?

No. Aqua regia is used to dissolve noble metals: gold and platinum. It does not affect diamond.


How much quantity need of aqua regia to dissolve 5000gms of gold?

To dissolve 5000g of gold, you would need approximately 1 liter of aqua regia, which is a 3:1 mixture of hydrochloric acid to nitric acid. It's important to handle aqua regia with caution as it is a highly corrosive and reactive mixture.


What is the solubility of gold in various solutions?

The solubility of gold varies depending on the solution it is in. Gold is generally insoluble in water, but it can dissolve in solutions containing cyanide or aqua regia.


Will mylar dissolve in aqua regia acid solution?

No, mylar is a type of polyester film that is resistant to most chemicals, including aqua regia. Aqua regia is a highly corrosive mixture of nitric acid and hydrochloric acid commonly used to dissolve noble metals like gold and platinum, but it will not dissolve mylar.


Which chemical can be used to precipitate gold from Aqua regia?

NaHSO3