pH water.

To know the pH of different water samples we use the "cresol red" , it's a simple experiment : we pour different water for example sea water, soapy water, hepar water, acetic acid, tap water, distilles water.

Procedure:

- We have to remove around 5mL of a water sample to a test tube
- Add some drop of cresol red in the test tubes and compare with the pH color indicator.
- Do the same experiment with the thymol blue.