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Indicator (Chemistry)

Revision as of 21:23, 30 March 2019 by NRJC (talk | contribs)

Key Stage 3

Meaning

An indicator is a dye that changes colour when other chemicals are present.

About Indicators

Some indicators detect pH but others can be used to detect other chemicals.

Some non-pH indicators you should know:

About pH Indicators

The colour of a pH indicator can be used to tell the pH of a solution.
Different indicators will have a different range of colours for different pH values.
A good indicator can be added to solution without affecting the pH of the solution. If an indicator change the pH of a solution it could not give an accurate reading.

Some pH indicators you should know:

Examples

These are the colour ranges of different indicator plants.
NaturalIndicators.png

Key Stage 4

Meaning

An indicator is a dye that changes colour when other chemicals are present.

About Indicators

Some indicators detect pH but others can be used to detect other chemicals.

Some non-pH indicators you should know:

About pH Indicators

The colour of a pH indicator can be used to tell the pH of a solution.
Different indicators will have a different range of colours for different pH values.
A good indicator can be added to solution without affecting the pH of the solution. If an indicator change the pH of a solution it could not give an accurate reading.

Some pH indicators you should know:

Examples

These are the colour ranges of different indicator plants.
NaturalIndicators.png