Chemistry: Indicators

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  • Created by: Lokes
  • Created on: 09-01-12 18:49

Indicators

pH stands for 'potential hydrogen'. It refers to the ability of a plant to attract hydrogen ions.

The pH scale is a reference grid which shows how acidic or alkaline a solution is.

The pH scale runs from 0-14, with 0 being a maximum concentration of acid and 14 being the maximum concentration of alkaline.

At pH 7, there is a balance between acid and alkaline solutions.

A universal indicator is a mixture of dyes which change colour gradually over a range of pH's. Any substance with more than one colour form can be used as an indicator.

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