Does Nitric Acid "really" dissolve gold

[Dave]

Hey Guys

Whats everyone's thoughts on this.....

Au dissolving in nitric acid????

I have read mixed literature on this but I have not experienced any evidence that it actually does.

What I believe to be true is as follows

Au does dissolve in conc nitric (an undetectible amount) and forms Au3+ ions (i.e. the start of the aqua regia process) but unless HCl is actually added to the nitric acid the gold is effectively undissolved and remains exactly the same weight as what you started with.

Can anyone confirm this for me please?

Thanks

 

[fireguy]

Hey Guys

Whats everyone's thoughts on this.....

Au dissolving in nitric acid????

I have read mixed literature on this but I have not experienced any evidence that it actually does.

What I believe to be true is as follows

Au does dissolve in conc nitric (an undetectible amount) and forms Au3+ ions (i.e. the start of the aqua regia process) but unless HCl is actually added to the nitric acid the gold is effectively undissolved and remains exactly the same weight as what you started with.

Can anyone confirm this for me please?

Thanks

Well, if it is an undetectable amount, how would you ever know? You could run an ICP-MS on the nitric solution which would be a pretty sensitive analysis. I have never seen evidence of this so I would tend to discount it. If you are using tap water, or there was chlorine in the water you are making up your nitric solution with, that may form a very weak aqua regia which may cause slight gold dissolution- but that would be dissolution in aqua regia, not straight nitric.

 

[HankB]

Hey Guys

Whats everyone's thoughts on this.....

Au dissolving in nitric acid????

I have read mixed literature on this but I have not experienced any evidence Bathmate X30 https://www.grosseteste.com/bathmate-x30-review-results that it actually does.

What I believe to be true is as follows

I think it depends on how much gold there is to dissolve. A small amount maybe.

 

[JohnnyLopez]

Hey Guys

Whats everyone's thoughts on this.....

Au dissolving in nitric acid????

I have read mixed literature on this but I have not phenq https://enfinmince.fr/phenq-avis/ experienced any evidence that it actually does.

What I believe to be true is as follows

Thanks

If you leach with aqua regis nitric and hydrochloric acids ?

 

[Aerogrudge]

Aqua regia dissolves gold, nitric acid is used to part silver from the gold.

 

[Aerogrudge]

How would you know? If you shine a laser through the solution it will show particulates. Not conclusive on what particles unless you used a known pure sample of gold to see for yourself if it does.

 

[fireguy]

Hey Guys

Whats everyone's thoughts on this.....

Au dissolving in nitric acid????

I have read mixed literature on this but I have not experienced any evidence that it actually does.

What I believe to be true is as follows

Au does dissolve in conc nitric (an undetectible amount) and forms Au3+ ions (i.e. the start of the aqua regia process) but unless HCl is actually added to the nitric acid the gold is effectively undissolved and remains exactly the same weight as what you started with.

Can anyone confirm this for me please?

Thanks

I do not think gold dissolves in concentrated nitric. It would be easy enough to test. Digest a small amount of gold in concentrated nitric acid and read the resulting solution on the AA, ICP, or ICP-MS.