Question

what precautions should be taken while finding the pH of lemon juice

Answer 1

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

1.Take clean test tube to extract fresh lemon juice.
2.Always use dilute solution of lemon juice.
3.wash your hands before touching the pH paper.
4. Always use wet hands to touch pH paper