Here's the balanced chemical equation:
H₃PO₂(aq) + 2NaOH(aq) → NaH₂PO₂(aq) + 2H₂O(l)
Explanation:
* Hypophosphorous acid (H₃PO₂) is a weak monoprotic acid, meaning it can donate only one proton (H⁺) per molecule.
* Sodium hydroxide (NaOH) is a strong base, readily dissociating into sodium ions (Na⁺) and hydroxide ions (OH⁻) in solution.
* During neutralization, the hydroxide ions from NaOH react with the hydrogen ions from H₃PO₂, forming water (H₂O).
* The remaining sodium ions (Na⁺) combine with the hypophosphite ion (H₂PO₂⁻) to form sodium hypophosphite (NaH₂PO₂).
Key Points:
* The reaction is an acid-base neutralization reaction.
* The products are a salt (sodium hypophosphite) and water.
* The reaction is exothermic, releasing heat.
Note: The complete neutralization occurs when the moles of NaOH added are equal to twice the moles of H₃PO₂ present. This ensures that all the acidic protons from the H₃PO₂ are neutralized by the hydroxide ions.
