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Thread: Hydrogen peroxide H2O2 and microwave/heat?

  1. #1
    Super Grandmaster ponder's Avatar
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    Default Hydrogen peroxide H2O2 and microwave/heat?

    Can H2O2 safely be heated in a microwave?
    entia non sunt multiplicanda praeter necessitatem

  2. #2

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    Yes, but it won't be peroxide anymore. Decomposes to form water and free oxygen.

  3. #3
    Grandmaster agentrfr's Avatar
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    Why would you want to heat it in a microwave, lol?

    Probably not safe since heat radiation is not uniform in the microwave box. You might end up seperating too much O2 from it, making it a tad "unstable".

    If you need to heat it, use a bunsen burner or your nearest equivalent. Heck, a bowl of boilng water should do it.
    Last edited by agentrfr; 24-02-2012 at 10:23 PM. Reason: Fail Engrish
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  4. #4

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    http://mattson.creighton.edu/MicrowaveMethod/

    Preparation of Oxygen.
    The generation of oxygen is typically slow when done by the In-Syringe Method (See details). Oxygen is generated by the decomposition of 6% hydrogen peroxide with a small quantity of potassium iodide serving as a catalyst. Using a microwave oven, the reaction takes only a few seconds compared to over a minute by our original method.

    Lubricate the plunger's rubber diaphragm with silicone spray or oil. Drop a few crystals of solid KI into the syringe barrel and install the plunger fully into the barrel. Draw 5-mL 6% H2O2(aq) into the syringe and immediately cap the syringe with the Latex syringe cap. Place the syringe inside a sealable storage bag and seal the bag. The syringe must be positioned so that the plunger can move outward unobstructed by the bag. Heat the syringe/bag assembly in the microwave oven on the highest (500 W) setting for 7 - 10 seconds. Remove the bag and note the volume of gas produced. Additional time in the microwave may be necessary.

    After the plunger has reached the desired mark (usually 50-mL), position the syringe with the syringe cap upward and carefully remove the syringe cap. Turn the syringe 180o and discharge the excess liquid reagent into a plastic cup filled with water. Wash the gas in order to remove traces of aqueous chemicals from the inside surfaces of the syringe before the gases are used in experiments. To do this, draw 5-mL water into the syringe without discharging any gas, cap the syringe and shake the syringe to splash the rinsewater on every inside surface. Remove the cap (cap end up!) and discharge the water but not any of the gas. Repeat if necessary.

    We have published eight experiments that can be performed with oxygen. (See details).

  5. #5
    Super Grandmaster ponder's Avatar
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    Not to worry. I will mix the vanish, glycerine & corn starch into a bit of hot water to dissolve before adding the peroxide.
    entia non sunt multiplicanda praeter necessitatem

  6. #6

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    Quote Originally Posted by ponder View Post
    Not to worry. I will mix the vanish, glycerine & corn starch into a bit of hot water to dissolve before adding the peroxide.
    Just curious what are you trying to make or do ??
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    Should we be worried?

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    Super Grandmaster ponder's Avatar
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    Quote Originally Posted by FNfal View Post
    Just curious what are you trying to make or do ??
    http://www.msnbc.msn.com/id/32976055.../#.T0oSfodOCAg
    Quote Originally Posted by Freshy-ZN View Post
    Should we be worried?
    No, I'm not a nut job!

    Need to make some of this,
    http://retr0bright.wikispaces.com/
    http://www.flickr.com/photos/66071596@N00/3822230561/
    entia non sunt multiplicanda praeter necessitatem

  9. #9
    SmoothOokerMaximus The_Librarian's Avatar
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    Very interesting!
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  10. #10

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    Quote Originally Posted by ponder View Post
    Now that's worth some rep!

  11. #11

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    Quote Originally Posted by ponder View Post
    Very interesting thanks
    If it walks like a duck and kwaks like a duck ..its a duck

  12. #12
    Super Grandmaster ponder's Avatar
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    Quote Originally Posted by biometrics View Post
    Now that's worth some rep!
    Quote Originally Posted by FNfal View Post
    Very interesting thanks
    Thanks. I have posted this once before http://mybroadband.co.za/vb/showthre...ed-pc-plastics

    I'm busy servicing & restoring a old Kenwood Chef food processor to it's former glory. I've stripped everything down to nut & bolt level and cleaned it, put the motor & gearbox back together so now it's just the final assembly and then I need to remove the yellowing from the one upper plastic cover to match the enameled metal body.
    Last edited by ponder; 26-02-2012 at 06:14 PM.
    entia non sunt multiplicanda praeter necessitatem

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