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Class X<br />
EXPERIMENT No: 2<br />
AIM: To study the soaponification reaction of preparation jof soap.<br />
Materials Required : Vegetableoil (25 ml) Suchas castor oil or coconut oil, sodium hydroxide,<br />
common (about 10g), distilled water, two beakers (250ml capacity), two test tubes, measuring<br />
cylinders (50ml salt), a glass rood, a knife.<br />
Procedure :<br />
1. Place about 25 ml castor oil coconut oil in a beaker of 25 ml.<br />
2. Make 50 ml 20% solution of sodium hydroxide in distilled water.<br />
3. Pour 30 ml of above prepared solution of sodium hydroxide in 25 ml of oil taken above<br />
in beaker in the form of thin stream and stir the mixture.<br />
4. The above mixture of beaker becomes viscous and thick, this is a soap.<br />
5. Dissolve 10 g sodium chloride in about 15 ml of water. Add this solution in the soap<br />
formed above with constant stirring till the mixture cools & become solid.<br />
6. Leave it for a day till the mixture and cut it into desired shapes and sizes.<br />
7. Remove the soap from the beaker and cut it into desired shapes and sizes.<br />
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