Determination of pH of a fertiliser

AIM:
To determine the pH of a given fertiliser.
REQUIREMENTS:

• Fertiliser sample
• Electronic balance
• 250ml beaker
• Glass rod
• Distilled water
• pH meter
• Buffer solution of pH 7

PROCEDURE:

• Weigh 5gm of the given fertiliser sample.
• Note the weight taken.
• Put the weighed sample into a 250ml beaker.
• Add 100ml distilled water.
• Stirr using glass rod.
• Adjust the value of pH meter using buffer solution of pH 7.
• Place the fertiliser sample & note the pH corresponding to it.
• Report the pH value corresponding to 5 gm of sample.

The working of a pH meter is already explained in the previous experiment.