Does gold dissolve in hydrochloric acid?

Answer 1

No. Gold will dissolve in solutions capable of oxidizing it (turning into Au3+ by stripping off 3 electrons). All HCl has available to oxidize the gold is H+ ions, which would form H2(g) when reduced (gaining 2 electrons). To tell whether or not something will be oxidized, you have to look at its oxidation or reduction potentials. For the standard reduction potential for Au3+ ions to form Au is 1.50V, which means that this is a relatively favorable process. To reverse the process and turn Au into Au3+ (oxidation) would have a negative oxidation potential: Au --> Au3+ + 3 e- Eo = -1.50V So to make this happen (i.e. dissolve gold) you would need something that wanted to be reduced with a potential greater than 1.50V. H+ ions don't cut it... they have a reduction potential of 0.00V: 2 H+ + 2 e- --> H2(g) Eo = 0.00 V So HCl cannot dissolve gold.

Answer 2

Gold is one of the least reactive metals(if u chck the reactivity serise)..so it will not react with HCL....but Royal Water or Aqua regia which is a highly fuming, corrosive mixture whch contains conc. nitric acid and conc. hydrochloric acid in the ratio 1:3 can even dissolve gold which can be later extracted by various means...(Many people use this to their own advantage!!! -- tk gold ornaments frm ppl in promise to mk them shiny,dip the ornaments in aqua regia,whc does mk them shiny bt also reduces the weight as gold dissolves into Aqua regia.....they later extract the gold from Aqua Regia)

No. Gold will be unreactive. However.... Royal water...aqua regia can be made by mixing 1 part Nitric acid with 3 parts hydrochloric acid. This cocktail will now dissolve your gold. With Gold hovering around $1220 an ounce.....I suggest you divert your attention to other more constructive things!

Answer 3

Gold (Au) does not react with acid base or neutral substance. It is one of the least reactive element.

Answer 4

Aqua regia (one part nitric acid to three parts hydrochloric--VERY dangerous stuff!) will dissolve gold, but a single acid cannot.

Answer 5

no

Answer 6

No