Determinaton of pH of water

AIM :
To determine the pH of water.

REQUIREMENTS :

• pH meter
• Water sample
• 250ml beaker
• buffer of pH 7

PROCEDURE:

Working of a pH meter :

The pH meter is set up first with distilled water for atleast 30 minutes.Then clean the rod with filter paper.Place pH 7 solution & adjust the pH to 7.Clean the rod again with filter paper.Place the water sample & note the pH either at 0-7 or 7-14.
Step 1:
Shake the sample bottle well.
Step 2:
Transfer 150ml water sample in a 250ml beaker.
Step 3:
The pH meter is set to 7 with buffer solution of pH 7.
Step 4:
Then place the water sample .Adjust either 0-7 or 7-14 & note the pH of the solution.