May 31, 2020, 07:35:38 PM
Forum Rules: Read This Before Posting

Topic: Orange color in bad permanganate-oxalate titration  (Read 3509 times)

0 Members and 1 Guest are viewing this topic.

Offline whmice

  • New Member
  • **
  • Posts: 3
  • Mole Snacks: +0/-0
  • Gender: Male
Orange color in bad permanganate-oxalate titration
« on: March 23, 2008, 03:38:13 PM »
a few weeks ago i analyzed hydrogen peroxide in detergents with potassium permanganate. i used sodium oxalate to calibrate my solution.
in one of my oxalate titrations i added permanganate too quickly and my solution   turned orange-brown with black precipitates(before calculated end point). where could this color come from?
titrated 0.1994 grams of disodium oxalate : 1.49E-3 mole
orange color appeared after titrating 23.4 ml in less than 10s of permanganate 0.0181M for a total of 4.23E-4 mole. theoreticaly needed 5.95E-4 mole

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 25774
  • Mole Snacks: +1686/-400
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Orange color in bad permanganate-oxalate titration
« Reply #1 on: March 23, 2008, 03:47:32 PM »
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation,,

Sponsored Links