Nitric Acid Oxidation of Silver
3Ag + 4HNO3(dilute) → 3AgNO3 + NO + 2H2O
概要
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.
参加者
| 役割 | 物質 | 係数 | 状態 |
|---|---|---|---|
| 反応物 | Silver Ag | 3 | (s) |
| 反応物 | Nitric Acid HNO₃ | 4 | (aq) |
| 生成物 | Water H₂O | 2 | (l) |
| 生成物 | Silver Nitrate AgNO₃ | 3 | (aq) |
日常の例
Jewelers use nitric acid to test whether a piece is real silver, as silver dissolves producing a green solution.
産業上の重要性
硝酸による銀の溶解は銀精錬の第一段階であり、写真や分析に不可欠な硝酸銀の調製に用いられる。
特性
- タイプ
- Redox
- 可逆的
- いいえ
- エネルギー
- 発熱性
- ΔH
- -85.0 kJ/mol
関連する反応
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.