I'm doing a redox titration with potassium bi-ethanedioatecopper(II)-2-water
I am first titrating it (when added to sulfuric acid) with potassium manganate until it reaches "just pink"
Then adding KI and titrating with sodium thiosulfate until I add starch and it no longer turns blue black
Question - if in the first titration, the "just pink" is exceeded, this may cause the titre value of the 2nd titration to be too large. Suggest a reason for this
Even more elitist than everyone thought?