Q22.
22. Write two precautions required while finding the pH of the samples.
The precaution required while finding the pH of the sample are :-
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- Do not touch, smell and taste any of the sample directly.
- Keep the pH strips away from chemical solutions.
- Do not touch the pH paper with dirty or wet hand.
- Colour developed on the pH paper should be compared carefully with that of the given chart.
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