Question

What could I have done wrong in the saponification of the ester? I did not get soap

1.) Place .18 g of saturated triglyceride in a 5 mL short necked round bottom flask.

2.)Add 1.5 mL of a 50-50 water ethanol solution that contains .18 g of sodium hydroxide.

3.)Add an air condenser and gently reflux mixture on sand bath for 30 minutes

Do not boil away ethanol

-At the end of their reaction period, some of this soap will have precipitated.

4.)Transfer mixture to a 10 mL Erlenmeyer flask containing a solution of .8 g of sodium chloride and 3 mL of water

5.)Collect precipitated soap on a Hirsch funnel and wash it free of sodium hydroxide and start using 4 mL of ice cold water

6)Test so by adding a very small piece to a test tube along with 3 to 4 mL of distilled water.

Cap tube and shake vigorously

Note height and stability of bubbles

7.)Add a crystal of magnesium chloride or calcium chloride to the tube

Shake tube again and note results

Answer 1

Answer:

following alteration you can done in your procedure:-

1. Make the water ethanol solution 1:3 .

2. Increase the time of refluxing upyog hour because this reaction is too slow. If solvent evaporate during refluxing add more during the reaction.

By this you will definitely get the soap. If you don't get even by this alterations feel free to ask me.