Phosphoric Acid Second Neutralization
H3PO4 + 2NaOH → Na2HPO4 + 2H2O
Tổng quan
Partial neutralization of phosphoric acid with two equivalents of NaOH produces disodium hydrogen phosphate. This salt forms solutions near pH 9.2 and is one component of the phosphate buffer system widely used in biochemistry. The dibasic form is the predominant species at physiological pH.
Người tham gia
| Vai trò | Chất | Hệ số | Trạng thái |
|---|---|---|---|
| Chất phản ứng | Phosphoric Acid H₃PO₄ | 1 | (aq) |
| Chất phản ứng | Sodium Hydroxide NaOH | 2 | (aq) |
| Sản phẩm | Water H₂O | 2 | (l) |
Ví dụ thực tế
Phosphate buffer saline (PBS) used in biology labs contains disodium hydrogen phosphate to maintain pH around 7.4.
Tầm quan trọng công nghiệp
Disodium hydrogen phosphate is used in food processing as an emulsifier, in water treatment, and in pharmaceutical formulations as a buffering agent.
Tính chất
- Loại
- Acid-Base
- Thuận nghịch
- Không
- Năng lượng
- Tỏa nhiệt
- ΔH
- -112,0 kJ/mol
Phản ứng liên quan
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Carbonic Acid and Sodium Hydroxide
Aluminum Hydroxide as Amphoteric Acid with NaOH
Aluminum Chloride and Chloride Ion (Lewis Acid-Base)
Hydrochloric Acid and Sodium Hydroxide Neutralization
Nitric Acid and Potassium Hydroxide Neutralization
Hydrochloric Acid and Barium Hydroxide
Frequently Asked Questions
What is the equation for Phosphoric Acid Second Neutralization?
The balanced equation is: H₃PO₄ + 2NaOH → Na₂HPO₄ + 2H₂O.
What type of reaction is Phosphoric Acid Second Neutralization?
Phosphoric Acid Second Neutralization is a acid-base reaction.
Is Phosphoric Acid Second Neutralization exothermic or endothermic?
Phosphoric Acid Second Neutralization is exothermic (releases energy). The enthalpy change (ΔH) is -112.0 kJ/mol.