Thursday September 12th, 2013 00:31 How to make Fireflies

Face Of Chemistry Ammonia oxidation. Catalyst – Chromium oxide Cr2O3. I used burning Ammonium Dichromate. When it decomposes it produces Chromium Oxide. Photos of this project: www.flickr.com More info: www.faceofchemistry.com

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    51 Comments on “How to make Fireflies”

    • benvivitron November 7, 2010 at 2:06 am

      where do you get the chemicals?

    • FaceOfChemistry November 9, 2010 at 4:03 am

      @benvivitron Well, chemistry is my hobby and I have chemical shop 🙂

    • derkozten December 26, 2010 at 5:00 am

      Does chromium oxide catalyze some kind of reaction from ammonia? Like oxidation to N2 and water?

    • FaceOfChemistry December 27, 2010 at 5:47 am

      @derkozten
      Chromium (III) oxide is a catalyst. It speeds-up the reaction between ammonia and oxigen:
      4NH3 + 5O2 = 4NO + 6H2O
      The heat of the oxidation reaction occurring on the surface of chromic oxide particles is sufficient to keep particles of the catalyst glowing bright red (we see sparks in jar).

    • 1Dudey1 December 29, 2010 at 4:30 pm

      what es the music?

    • AHW214 January 2, 2011 at 3:09 am

      @FaceOfChemistry
      Could the decomposition of NH3 be like this:
      4NH3+3O2=6H2O+2N2

    • AHW214 January 2, 2011 at 3:10 am

      @FaceOfChemistry
      Sorry I meant reaction with oxygen, not decomposition.

    • TroJoungJake April 26, 2011 at 6:33 pm

      Why when I tried it, it didn’t work. What kind of Ammonia solution do I need to do the experiment?

    • FaceOfChemistry May 4, 2011 at 2:46 am

      @TroJoungJake Probably it’s because you didn’t wait enough for ammonia to vaporise. I used conc. ammonia solution ~25%

    • TroJoungJake May 6, 2011 at 8:55 pm

      @FaceOfChemistry Well, thank you

    • DoktorKlawonn June 13, 2011 at 8:26 pm

      Nice experiment, the music is well chosen! Did you experience any nitrous gases?

    • Phacias July 5, 2011 at 6:39 am

      I am addicted to this video 🙂

    • Crystal0mask October 9, 2011 at 2:23 am

      Now this is awesome

    • groerl October 24, 2011 at 3:51 am

      @TroJoungJake ammonia from yours moms pussy shoul be strong enough,..

    • stfuih8ulol October 26, 2011 at 12:15 am

      that doesnt look like fireflies to me. it looks like sparks. :\

    • katiaterarocks October 27, 2011 at 9:52 am

      amazing

    • plasticraincoat1 November 1, 2011 at 5:50 am

      EXCELLENT DEMO ! thanks 🙂

    • Photon98 November 18, 2011 at 11:17 pm

      Looks like Photoshop….

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