Question

How can you show the effect of alkalis on indicators?

Answer 1

When an acid is dissolved in water we get an acidic solution, and alkalis make alkalinesolutions. If a solution is neither acidic nor alkaline we call it neutral. Pure water is neutral, and so is paraffin.

Indicators are substances that change colour when they are added to acidic or alkaline solutions. You can prepare homemade indicators from red cabbage or beetroot juice - these will help you see if a solution is acidic or alkaline.

Answer 2

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If a solution is neither acidic nor alkaline it is neutral. Pure water is neutral, and so is paraffin . Indicators are substances that change colour when they are added to acidic or alkaline solutions.

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