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)
Copper Oxidation by Nitric Acid
Hypochlorite Oxidation of Hydrogen Peroxide
Hydrogen Peroxide as Oxidizing Agent (Acidic)
Hydrogen Peroxide Disproportionation
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.