Silver Bromide Precipitation
AgNO3 + NaBr → AgBr↓ + NaNO3
概要
Silver bromide precipitates as a pale yellow solid with Ksp = 5.4 × 10⁻¹³. It is much less soluble than AgCl. Silver bromide is photosensitive, decomposing in light to form metallic silver and bromine. This photosensitivity made AgBr the key compound in photographic film emulsions.
参加者
| 役割 | 物質 | 係数 | 状態 |
|---|---|---|---|
| 反応物 | Silver Nitrate AgNO₃ | 1 | (aq) |
| 生成物 | Sodium Nitrate NaNO₃ | 1 | (aq) |
日常の例
All analog photographs ever taken relied on silver bromide crystals darkening when exposed to light in the camera.
産業上の重要性
臭化銀は150年以上にわたり写真産業の基盤であった。デジタルがフィルムに取って代わったが、AgBrは特殊な医療・科学用イメージングに今も使用される。
特性
- タイプ
- Precipitation
- 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
Aluminum Hydroxide Precipitation
Barium Sulfate Precipitation
Cadmium Sulfide Precipitation (Yellow)
Calcium Phosphate Precipitation (Bone Mineral)
Chromium(III) Hydroxide Precipitation
Lead Carbonate Precipitation
Magnesium Hydroxide Precipitation
Copper Sulfide Precipitation
Cobalt(II) Hydroxide Precipitation
Iron(III) Hydroxide Precipitation
Frequently Asked Questions
What is the equation for Silver Bromide Precipitation?
The balanced equation is: AgNO₃ + NaBr → AgBr↓ + NaNO₃.
What type of reaction is Silver Bromide Precipitation?
Silver Bromide Precipitation is a precipitation reaction.
Is Silver Bromide Precipitation exothermic or endothermic?
Silver Bromide Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -85.0 kJ/mol.