Question

what are the two precautions required while finding ph of samples

Answer 1

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Here is your answer............

Precautions:

1.    Use only the standard colour chart supplied with the pH paper for assessing the ph value.

2.    Keep the pH strips away from chemical fumes.

3.    Either use fresh fine dropper or glass rod for each different sample, or wash the dropper or rod well with water every time.

Answer 2

Precautions:

1.    Use only the standard colour chart supplied with the pH paper for assessing the ph value.
2.    Keep the pH strips away from chemical fumes.
3.    Either use fresh fine dropper or glass rod for each different sample, or wash the dropper or rod well with water every time.