• Question: what would happen if they extended the scale to 15ph, how dangerous would it be?

    Asked by ALFIE! to David, Eva, Kate, Nicholas, Rachel on 14 Nov 2015.
    • Photo: Nicholas Pearce

      Nicholas Pearce answered on 14 Nov 2015:

      Hey Alfie,

      The pH scale does extend past 14 and also below 0 into negative values of pH! In water solutions the limits of pH are about -1.4 and 15.4, but pure acids or bases, that aren’t diluted in water can be stronger.
      As for the danger and increase from pH 14 to pH 15 would make something 10 times stronger, so probably 10 times more dangerous – be careful!

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