What’s called Red but really Purple and comes out Blue?

by Deb on May 6, 2011

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{ 4 comments }

jasmine May 7, 2011 at 5:18 am

Hey! Don’t suppose you can utilize this method to test the ph of a fish tank? lol, i grow tired of passing by the overpriced ph test kits at walmart =/
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Deb May 8, 2011 at 11:18 am: Depends how exact it needs to be. You can work out a pH scale comparing it to another scale but I don’t know how fine it is. If your fishtank needs to be within a few points it’s probably not a good idea!

Hear Mum Roar May 7, 2011 at 12:36 pm

This looks brilliant! My kids would love it

Louise at Tales from the Sandpit May 9, 2011 at 8:06 am

Hi Deb, thanks for this clear explanation about how to do it – but how do you explain it (because they will ask WHY) – I understand that the cabbage water reacts to the chemicals according to what sort of chemical it is – acid or alkali – what’s that to 5 year olds?
And do you have any nifty ideas for seeds – apart from the obvious growing, grinding, cooking, tasting things.
Thanks
Louise

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