Indicators are substances that show a change in colour when brought in contact with an acid or base.
Some Common indicators are Phenophthalein,Methyl Orange and Red/Blue Litmus Paper.
Below is a table which shows the colour change of these indicators
Indicators can also be prepared from plant.Such indicators are called Natural Indicators.
A Universal Indicator is a mixture of indicators chosen such that it shows a different colour for different PH values.It can also be soaked into a paper called PH paper.
Some Common indicators are Phenophthalein,Methyl Orange and Red/Blue Litmus Paper.
Below is a table which shows the colour change of these indicators
A Universal Indicator is a mixture of indicators chosen such that it shows a different colour for different PH values.It can also be soaked into a paper called PH paper.
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