How do we test whether a substance is an acid or base? Give example of some substances that can be used for testing acids and bases. [3 MARKS]

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Solution

Each point: 1 Mark

1. For testing whether a substance is an acid or base, we use indicators.
2. Indicators are special substances that show a change of colour or smell when added to a solution containing an acidic or a basic substance.
3. Examples of indicators are: Turmeric, litmus, china rose petals, vanilla, etc.

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