Phosphoric Acid and Sodium Hydroxide (First Neutralization)

H3PO4 + NaOH → NaH2PO4 + H2O

Descripción general

The first neutralization step of the triprotic phosphoric acid produces monosodium phosphate and water. Phosphoric acid has three ionizable protons with Ka1 = 7.1 × 10⁻³, Ka2 = 6.3 × 10⁻⁸, and Ka3 = 4.2 × 10⁻¹³. Each successive proton is progressively harder to remove.

Participantes

Rol Sustancia Coeficiente Estado
Reactivo Phosphoric Acid H₃PO₄ 1 (aq)
Reactivo Sodium Hydroxide NaOH 1 (aq)
Producto Water H₂O 1 (l)

Ejemplo cotidiano

Monosodium phosphate is used as a leavening agent in baking and as an emulsifier in processed cheese.

Importancia industrial

Relevante en la formulación de tampones, aditivos alimentarios y purificación de fosfatos industriales.

Propiedades

Tipo
Acid-Base
Reversible
No
Energía
Exotérmico
ΔH
-56,0 kJ/mol

Reacciones relacionadas

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 Phosphoric Acid and Sodium Hydroxide (First Neutralization)?
The balanced equation is: H₃PO₄ + NaOH → NaH₂PO₄ + H₂O.
What type of reaction is Phosphoric Acid and Sodium Hydroxide (First Neutralization)?
Phosphoric Acid and Sodium Hydroxide (First Neutralization) is a acid-base reaction.
Is Phosphoric Acid and Sodium Hydroxide (First Neutralization) exothermic or endothermic?
Phosphoric Acid and Sodium Hydroxide (First Neutralization) is exothermic (releases energy). The enthalpy change (ΔH) is -56.0 kJ/mol.