[CH] Cabbage as pH indicator.

Cameron Begg (begg@ceof.ohio-state.edu)
Wed, 10 Mar 2004 10:54:07 -0500 

Hi C-H's,

I was trying to find a suitable book of chemistry experiments for Gavin's birthday and came across instructions for making an indicator solution out of red cabbage. Basically whizz the cabbage up in cold water (could use distilled if your tap water is not close to pH 7) and use the liquid which separates at the top for checking your bottled sauces. It's not accurate, but if your sauce turns the extract red you'll be safe. Hey - use red cabbage as an ingredient!

approximate pH:        color of extract:
2                                        red
4                                     purple
6                                      violet
8                                       blue
10                                blue-green
12                                    green

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                     Regards,               Cameron.