Phosphate Buffer System
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H2PO4− ⇌ HPO42− + H+
概要
The dihydrogen phosphate/hydrogen phosphate buffer system operates near pH 7.2, making it ideal for biological applications. With pKa2 = 7.2, it buffers effectively between pH 6.2 and 8.2. This is the buffer system used in phosphate-buffered saline (PBS), the most common buffer in biology.
参加者
| 役割 | 物質 | 係数 | 状態 |
|---|---|---|---|
| 反応物 | Phosphoric Acid H₃PO₄ | 1 | (aq) |
日常の例
Phosphate buffers help maintain the pH of many biological fluids and are used in nearly every molecular biology laboratory.
産業上の重要性
リン酸緩衝系は細胞培養用PBS、臨床診断、食品加工、中性付近のpHを必要とする医薬品製剤に使用される。
特性
- タイプ
- Acid-Base
- 可逆的
- はい
- エネルギー
- 吸熱性
関連する反応
Hydrochloric Acid and Barium Hydroxide
Acetic Acid and Sodium Acetate Buffer System
Acetic Acid Dissociation in Water
Ammonia and Hydrochloric Acid
Ascorbic Acid and Sodium Hydroxide
Barium Hydroxide and Ammonium Thiocyanate (Endothermic)
Carbonic Acid and Sodium Hydroxide
Aluminum Hydroxide as Amphoteric Acid with NaOH
Aluminum Chloride and Chloride Ion (Lewis Acid-Base)
Formic Acid and Sodium Hydroxide
Frequently Asked Questions
What is the equation for Phosphate Buffer System?
The balanced equation is: H₂PO₄⁻ ⇌ HPO₄²⁻ + H⁺.
What type of reaction is Phosphate Buffer System?
Phosphate Buffer System is a acid-base reaction. It is reversible under certain conditions.
Is Phosphate Buffer System exothermic or endothermic?
Phosphate Buffer System is endothermic (absorbs energy).