Practice Problem 4

We can determine the concentration of an acidic permanganate ion solution by titrating this solution with a known amount of oxalic acid until the charactistic purple color of the MnO₄^- ion disappears.

H₂C₂O₄(aq) + MnO₄^-(aq) CO₂(g) + Mn²⁺(aq)

Use the half-reaction method to write a balanced equation for this reaction.

Answer

2 MnO₄^-(aq) + 5 H₂C₂O₄(aq) + 6 H⁺(aq) 10 CO₂(g) + 2 Mn²⁺(aq) + 8 H₂O(l)