Nitric Acid Oxidation of Silver

3Ag + 4HNO3(dilute) → 3AgNO3 + NO + 2H2O

Visão geral

Dilute nitric acid dissolves silver metal, oxidizing it to Ag⁺ while the nitrate is reduced to NO gas. Silver does not dissolve in HCl or H₂SO₄(dilute) because the H⁺ ion cannot oxidize silver, but nitric acid's nitrate ion provides sufficient oxidizing power. This is part of the aqua regia chemistry for noble metals.

Participantes

Papel Substância Coeficiente Estado
Reagente Silver Ag 3 (s)
Reagente Nitric Acid HNO₃ 4 (aq)
Produto Water H₂O 2 (l)
Produto Silver Nitrate AgNO₃ 3 (aq)

Exemplo do cotidiano

Jewelers use nitric acid to test whether a piece is real silver, as silver dissolves producing a green solution.

Importância industrial

A dissolução da prata em HNO₃ é a primeira etapa na refinação de prata e na preparação de nitrato de prata, um composto químico essencial em fotografia e análise química.

Propriedades

Tipo
Redox
Reversível
Não
Energia
Exotérmico
ΔH
-85,0 kJ/mol

Reações relacionadas

Iron(II) to Iron(III) Oxidation by Oxygen Bleaching with Sodium Hypochlorite Copper Reduction of Silver Ion Aqua Regia Dissolving Gold Cerium(IV) Reduction by Iron(II) Chlorine Oxidation of Bromide Copper Oxidation by Nitric Acid Hypochlorite Oxidation of Hydrogen Peroxide Hydrogen Peroxide as Oxidizing Agent (Acidic) Displacement of Hydrogen from Acid by Magnesium

Frequently Asked Questions

What is the equation for Nitric Acid Oxidation of Silver?
The balanced equation is: 3Ag + 4HNO₃(dilute) → 3AgNO₃ + NO + 2H₂O.
What type of reaction is Nitric Acid Oxidation of Silver?
Nitric Acid Oxidation of Silver is a redox reaction.
Is Nitric Acid Oxidation of Silver exothermic or endothermic?
Nitric Acid Oxidation of Silver is exothermic (releases energy). The enthalpy change (ΔH) is -85.0 kJ/mol.