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Paper 3Theory (Core)2 marks
Indicators are used in various chemical tests to determine the acidity of solutions.
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Indicator Color Changes
Litmus paper and methyl orange are common indicators used in laboratories. Litmus paper turns red in acidic solutions and blue in basic solutions. Methyl orange turns red in acidic solutions and yellow in neutral to basic solutions.
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Explain how litmus and methyl orange indicate the presence of acids.
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