• Question: what is the ph scale what does all the colours mean and can you tell me a bit more about acids and akalais

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    Asked by louiseaori to Ed, Sam, Steve on 23 Jun 2011.
    • Photo: Sam Tazzyman

      Sam Tazzyman answered on 23 Jun 2011:

      I haven’t studied chemistry since school so I can’t tell you much. But here’s a colour chart of the scale and some of the things at each pH level.

    • Photo: Ed Morrison

      Ed Morrison answered on 23 Jun 2011:

      The pH scale is about the concentration of hydrogen ions in a solution. Ions are like atoms with extra or missing electrons. The more hydrogen ions, the more acidic a solution will be, and the fewer ions the less acidic it will be. There are some different tests for pH and I think the colours can change depending on what you use.

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