Lauric Acid Purity

AIM:

To determine the purity of given sample of lauric acid.

APPARATUS:

• Electronic balance
• 500ml conical flask : 2
• Water bath
• Dropper
• Burette
  

REQUIREMENTS:

• lauric acid sample
• Ethanol
• Phenolphthalein
• 0.1 N NaOH

PROCEDURE:

• Weigh 1gm of lauric acid sample using an electronic balance.
• Note the weight taken.
• Add the weighed lauric acid sample to a 500ml conical flask.
• Add 50ml ethanol to the conical flask.
• Heat the conical flask on a water bath till the contents dissolve.
• Cool for a while.
• Add 1 drop of phenolphthalein to the conical flask .
• Titrate against 0.1 N NaOH from the burette.
• A blank is also conducted.
  

CALCULATION:

From the weight of lauric acid taken, volume of NaOH & normality of NaOH, the purity of lauric acid can be calculated.