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Acids, bases and salt
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04/09/2021 8:23 pm
Topic starter
(a) What is an indicator? Name three common indicators.
(b) Name the acid-base indicator extracted from lichen.
(c) What colour does the turmeric paper turn when put in an alkaline solution?
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04/09/2021 8:23 pm
(a) An indicator is a ‘dye’ that changes colour when it is put in an acid or a base.
The three most common indicators are: Litmus, Methyl orange and Phenolphthalein.
(b) Litmus.
(c) Red.