. Balancing chemical equations. Concentrated nitric acid reacts with copper and produce copper nitrate ( Cu(NO 3) 2), nitrogen dioxide (NO 2) gas and water as products.In this reaction, copper is oxidized to its +2 oxidation state while nitric acid is reduced to nitrogen dioxide.. After the reaction, color of the solution which contains Cu(NO 3) 2 is blue.. Language: ru es en. is a redox reaction. Balancing chemical equations. Chemical reaction. The solution acquires the blue color characteristic of the hydrated Cu 2+ ion. The reaction which occurs is Nitric acid has no action on gold, platinum, iridium, tantalum, rhodium, and titanium. 3Ni + 8HNO 3 → 3Ni(NO 3) 2 + 2NO + 4H 2 O (NO 2 is poisonous, and so this reaction should be done in a hood.) A more complex redox reaction occurs when copper dissolves in nitric acid. Chlorine is the cheapest and lightest product that can achieve this. The balanced equation is: CaCO3 + 2HNO3 → Ca(NO3)2 + H2O + CO2(g) I believe this reaction happens regardless of the concentration of nitric acid, since. Most fake gold jewelry is copper based, meaning a form of copper alloy, mainly type of brass (copper and tin). Nickel react with nitric acid. The higher the copper concentration, the more powerful the reaction. and explain the steps you tppk to get to the answer Mercury react with nitric acid to produce mercury(II) nitrate, nitric oxide and water. In your example here nothing is reduced or oxidized. The acid attacks the metal vigorously, and large quantities of the red-brown gas, nitrogen dioxide (NO 2) are evolved. Nickel react with nitric acid to produce nickel(II) nitrate, nitric oxide and water. Gold is unaffected by air, water, alkalis and all acids except aqua regia (a mixture of hydrochloric acid and nitric acid) which can dissolve gold. It will dissolve, however, in aqua regia, a mixture of two concentrated acids. reaction products were studied: namely, (i) the activity of metal and (ii) the concentration of acid. Write a balanced equation for the dissolution of gold in aqua regia. this is a double displacement reaction and the reaction of copper with nitric acid. Balanced equation Please help me! It will, for example, react very slowly with chlorine gas at room temperature to form gold chloride, AuCl 3 . The mnemonic schemes have one (Figure 1A) or two (Figure 1B) inputs and five outputs for every finger; gaseous products are listed in a clockwise direction toward increasing nitrogen oxidation number.According to the literature data, N 2 O is formed in the reactions of Fe and Al in dilute nitric acid; therefore, this gas is also shown in Figure 1A. Gold metal will not dissolve in either concentrated nitric acid or concentrated hydrochloric acid. With gold oxidized, Cl-ions in solution from hydrochloric acid combine with Au 3+ to form AuCl 4-, the chloroaurate ion.The solution may then be evaporated, and because aqueous ions cannot exist otuside of water, the chloroaurate ion combines with H + from hydrochloric acid to form the solid HAuCl 4.This compound may be redissolved in water and precipitated to give elemental gold. Although nitric acid reacts with many materials, for the purposes of gold buying, nitric acid reacts with copper based alloys. Gold does react with halogens. Chemical reaction. All other metals are attacked by the acid, often with the formation of nitrates, and reduction products of the nitric acid, which vary with the temperature and concentration of the acid. Gold is an almost non-reactive metal, but halogens — chlorine, bromine, fluorine and iodine — can dissolve it. Log in: Chemical reactions Сhemical tables. Home Reactions Blog. 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