Phosphoric Acid Second Neutralization
H3PO4 + 2NaOH → Na2HPO4 + 2H2O
Visão geral
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.
Participantes
| Papel | Substância | Coeficiente | Estado |
|---|---|---|---|
| Reagente | Phosphoric Acid H₃PO₄ | 1 | (aq) |
| Reagente | Sodium Hydroxide NaOH | 2 | (aq) |
| Produto | Water H₂O | 2 | (l) |
Exemplo do cotidiano
Phosphate buffer saline (PBS) used in biology labs contains disodium hydrogen phosphate to maintain pH around 7.4.
Importância industrial
O hidrogenofosfato dissódico é utilizado no processamento alimentar como emulsionante, no tratamento de água e em formulações farmacêuticas como agente tamponante.
Propriedades
- Tipo
- Acid-Base
- Reversível
- Não
- Energia
- Exotérmico
- ΔH
- -112,0 kJ/mol
Reações relacionadas
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Carbonic Acid and Sodium Hydroxide
Aluminum Hydroxide as Amphoteric Acid with NaOH
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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.