Saturday May 11th, 2013 01:44 Chemistry experiment – KMnO4 + NaOH + sugar

Potassium permanganate solution changes colour when poured into sodium hydroxide and sugar solution. Colours are as follows: – purple (MnO4- ions) – blue (MnO4 3- ions) – green (MnO4 2- ions) – orange (Mn 3+ ions)

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    25 Comments on “Chemistry experiment – KMnO4 + NaOH + sugar”

    • FractAlkemist May 12, 2010 at 8:44 am

      There’s something better you can do with KMnO4. Shovel a little into a test tube, then add a couple ml H2SO4. Shake gently a few minutes till you see a dark pretty green liquid. Then drop a popsicle stick or wood twig into it. Be sure you are filming so you can post it here.

    • MrsBazzingaa May 16, 2010 at 2:10 pm

      can you tell me which is which?!?!

    • xueyuki May 24, 2010 at 4:49 pm

      hello! may i know the proportions of your reagents? what was your concentration of NaOh and KMnO4 in the first place?^^ thank you!

    • pyropakman June 26, 2010 at 4:55 am

      @FractAlkemist :Yeah….don’t do that. You make the dangerous anhydride, Manganese Heptoxide, Mn2O7. Any organics in the vicinity will combust vigorously and dangerously.

      Any dirt, any dust, any residue on the inside of a flask: it counts.

    • Cloud9er July 21, 2010 at 12:18 am

      dude you need labels on your video or some talking…

    • 000Winter000 August 3, 2010 at 12:17 pm

      I have a question for a chemist: How do I remove oil/petrolium from water? I want to distill the contaminated water, but since oil has a lower boiling point than water, it will rise up with the steam and end up in the containment jug along with the “pure” water. Should I pre-treat the water with sodium Hydroxide to break down the petrolium, and then distill it?

    • TirianB August 5, 2010 at 3:29 am

      @MrsBazzingaa I don’t think they purple stuff is the sugar.

    • yongrenjie August 6, 2010 at 6:15 pm

      @MrsBazzingaa Well the extremely cool purple liquid in the beaker is potassium permanganate. The solid is sugar, it can’t be sodium hydroxide because NaOH is extremely hygroscopic. The other one is sodium hydroxide.

    • janishani77667766 September 2, 2010 at 2:11 pm

      how thiz

    • cesarflanatico17 September 27, 2010 at 4:42 am

      Mn nox = +7 purple
      Mn nox = +6 green
      Mn nox = +4 brown

    • hematitecrow September 27, 2010 at 5:44 pm

      Skip to 1.15 to save 47 seconds of your life.

    • laurenseman October 12, 2010 at 12:20 am

      cool how u gotit 2 change colors like that. bravo.

    • Sigma1694 November 2, 2010 at 3:59 am

      sugar,spice and everything nice…

    • Chmielok November 22, 2010 at 2:57 am

      There is no orange, because Mn 3+ nearly doesn’t exist. There are pale pink Mn 2+.

    • Taytay1413 December 7, 2010 at 10:36 am

      What is the formula for this reaction?

    • DavidEdwardSchnell January 14, 2011 at 10:59 am


    • duniastaa February 25, 2011 at 2:11 am

      1stly You added sugar, then NaOH and then KMnO4 ?? Is that right??

    • duniastaa March 14, 2011 at 1:53 am

      Ok, i did it myself on my chemistry lesson. It does work, but You need to get the right balance of those ingredients. We did it exactly like on this vid but we needed to put some water into K2MnO4 bcoz firstly it was too dark… Sorry for my english mistakes, i am from Poland ^ ^

    • JRV95 March 17, 2011 at 9:10 am


      KMnO4 (Potassium Permanganate) + NaOH ( Sodium Hydroxide) + C6H12O6 (Glucose) ->

      Not sure about the products, so that means it probably isn’t balanced but those are the reactants. I would work it out and put the states of the products and reactants but I’m lazy and I want some cheese sticks.

    • RsGhost1 March 27, 2011 at 5:13 am

      Wow :O I assume the NaOH is used to slow the dissolving proces of MnO4?

    • commercialmats May 17, 2011 at 4:23 am

      That is pretty cool. I think it is interesting how it will change between more then 2 colors like that.

    • edukid1984 May 18, 2011 at 1:51 pm

      Your Enligsh is just fine. Much better than some self-proclaimed native speakers who can’t even spell properly!

    • duniastaa May 20, 2011 at 12:52 am

      Yay, thank You :) )

    • simplyincognito May 23, 2011 at 1:58 pm

      hope that went in a waste container and not the sink…

    • tuananh605b May 27, 2011 at 11:47 pm

      the miracle of chemistry

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