Are there any household products that change colour when mixed?

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Offline Scuba89

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Scuba asked the Naked Scientists:
   
hi
 
Is there any non-perishable household product that changes colour when one other product is added?

If not then which possible CHEMICALS CAN I USE?
 
Thank you

What do you think?

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Offline lightarrow

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Scuba asked the Naked Scientists:
   
hi
 
Is there any non-perishable household product that changes colour when one other product is added?

If not then which possible CHEMICALS CAN I USE?
 
Thank you

What do you think?
Ink with bleach. It decolorize the ink colour.

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Offline Raghavendra

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please read colloids

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Offline Chemistry4me

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I'm not sure that is relevant to the topic.

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Offline RD

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Starch & Iodine  ... http://en.wikipedia.org/wiki/Iodine_test

Starch, e.g. flour.  Iodine e.g. "Betadine" from bathroom cabinet (dilute with water).

http://en.wikipedia.org/wiki/Lugol%27s_solution

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Offline Bored chemist

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How "non perishable" does it need to be?
The blackcuurant drink that I get through quite a lot of has a shelf life of wekks or months and it would change colour (and fizz) if I mixed it with biicarbonate of soda.

Incidentaly, I'd quite like to know how to read colloids, or even what the idea means.
However it's very hard to see what it could ahve to do with the question.
Please disregard all previous signatures.

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Offline Make it Lady

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I used to buy colour change bubble bath for my kids. It turned from red to blue when it hit hot water.
Give a man a fire and he is warm for a day, set a man on fire and he is warm for the rest of his life.

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Offline JP

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Absinthe changes color when you pour water into it.  Plus, it's delicious.


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lyner

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You can have fun with the water from red cabbage and some flowers, It will change colour as you add common, mild acids and alkalis, like lemon juice and cleaning agents (careful).

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Offline Raghavendra

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Funny ha