• Question: What type of general purpose pH indicator do you believe is the best?

    Asked by jackyboy1999 to Robert, Susanne on 23 Nov 2012.
    • Photo: Robert Insall

      Robert Insall answered on 23 Nov 2012:


      Hello again Jacky

      We never use pH indicator, so I can’t really help. We have pH electrodes – you just stick them in a solution and they read out the pH.

      I made pH indicator with my kids by chopping up red cabbage and squeezing out the juice. It goes yellow when it’s acidic and very deep purple when it’s basic. I think it was that way round. It was a while ago I did it. Try it sometime…

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