Question

Write two precautions required while finding the pH of the samples?

Answer 1

Precautions:

1. Use only the standard colour chart supplied with the pH paper for assessing the pH value.
2. Wash the test tubes and other glass apparatus thoroughly with distilled water, before use.
3. All solutions should be freshly prepared.
4. Keep the pH strips away from chemical fumes.
5. Either use a fresh fine dropper or glass rod for each different sample or wash the dropper or rod well with water every time.