Question

PLEASE HELP! PRE LAB FOR AP CHEM

Write a balanced net ionic equation for the reaction for the reaction between MnO₄¹⁻ ions and H₂C₂O₄ in acid solution.

Answer 1

Balanced net ionic equation;

2MnO₄⁻ + 16H⁺ + 5C₂O₄²⁻ → 2Mn²⁺ + 8H₂O + 10 CO₂

Step-by-step explanation:

• This is an example of a redox titration where acidified potassium permanganate (KMnO₄) is titrated against oxalic acid (H₂C₂O₄).
• A redox reaction is a type of reaction that involves both reduction and oxidation.
• One reactant of the reaction gains electrons(reduction) while another loses electrons(oxidation).
• During the redox reaction, H⁺/KMnO₄ undergoes reduction while the oxalic acid undergoes oxidation.
• Therefore, KMnO₄ is the oxidizing agent while H₂C₂O₄ is the reducing agent.
• The net ionic reaction will be;

2MnO₄⁻ + 16H⁺ + 5C₂O₄²⁻ → 2Mn²⁺ + 8H₂O + 10 CO₂

• From the reaction, MnO₄⁻ is reduced to 2Mn²⁺ while C₂O₄²⁻ is oxidized to CO₂.
• Therefore, two moles of KMnO₄ will react with 5 moles of oxalic acid.