Nitric Acid Oxidation of Silver

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

概述

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.

参与者

角色 物质 系数 状态
反应物 Silver Ag 3 (s)
反应物 Nitric Acid HNO₃ 4 (aq)
产物 Water H₂O 2 (l)
产物 Silver Nitrate AgNO₃ 3 (aq)

日常示例

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

工业重要性

硝酸银广泛用于摄影、电镀和医疗器械涂层。硝酸溶银是银精炼与回收的基础工艺。

属性

类型
Redox
可逆
否
能量
放热
ΔH
-85.0 kJ/mol

相关反应

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.