catalystic rainbow
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- Posts: 525
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catalystic rainbow
Does anyone know the reaction using ammonium molybdate? I vaguely remember sodium acetate? and that's it, maybe H2O2 as well. You make up 2 measuring cylinders and then put the catalyst in one and it goes through the rainbow colours.
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- Posts: 578
- Joined: 28 Jan 2021, 13:24
- Job Title: Lab Assistant
- School: MCS
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Re: catalystic rainbow
I'm not sure about that one. Depending on what you're wanting it for, this might be useful. Put about 50ml vinegar in a 500ml measuring cylinder, top it up to 500ml with tap water, keep adding universal indicator (stirring with a stirring rod) till its a fairly strong red and then add about a rounded teaspoon of washing soda. Stir it gently for a couple of seconds then let it sit and you will get a rainbow in your measuring cylinder.
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- Posts: 525
- Joined: 15 Aug 2011, 10:48
- Job Title: Lab Tech
- School: NDSC
- Suburb: west gippsland
- State/Location: VIC
Re: catalystic rainbow
No that's the junior one. I found Rainbow reaction that goes through all the colours using KI, NaS2O3, CH3COOH and the catalyst is H2O2, but I dont know how to dilute the 35% to 40vol now. Great prac but I wanted the the other one.
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- Posts: 578
- Joined: 28 Jan 2021, 13:24
- Job Title: Lab Assistant
- School: MCS
- State/Location: NSW
Re: catalystic rainbow
Did you ever find the one you were looking for? It sounds great! I’d love the info if you found it.