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) 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.