Nitric Acid Oxidation of Silver
3Ag + 4HNO3(dilute) → 3AgNO3 + NO + 2H2O
Tổng quan
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.
Người tham gia
| Vai trò | Chất | Hệ số | Trạng thái |
|---|---|---|---|
| Chất phản ứng | Silver Ag | 3 | (s) |
| Chất phản ứng | Nitric Acid HNO₃ | 4 | (aq) |
| Sản phẩm | Water H₂O | 2 | (l) |
| Sản phẩm | Silver Nitrate AgNO₃ | 3 | (aq) |
Ví dụ thực tế
Jewelers use nitric acid to test whether a piece is real silver, as silver dissolves producing a green solution.
Tầm quan trọng công nghiệp
Silver dissolution in HNO₃ is the first step in silver refining and in preparing silver nitrate, a key photographic and analytical chemical.
Tính chất
- Loại
- Redox
- Thuận nghịch
- Không
- Năng lượng
- Tỏa nhiệt
- ΔH
- -85,0 kJ/mol
Phản ứng liên quan
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.