It is a reaction of a fatty acid with a strong base, which gives rise to a salt of fatty acid, called soap. This reaction is very important because the fatty acids are insoluble in water, the soap molecules form groups (mecel·les) that disperse in water. That is, even though they are insoluble form colloidal dispercions. The difference is due to the fact that the carboxyl group (COOH) of the fatty acid is ionized and the little group (COO + strong base) are ionized and cause very many radicals.
Our objective is prepare soap.
MATERIALS:
- 600mL Beaker
- Spatula
- Watch glass
- Stirring rod
- 2 beakers 250mL
-electronic balance
- Gloves
- Safety goggles
- Hot plate
- 32g NaOH
- 90mL H2O
- 270mL Oil
PROCEDURE:
First we measured the grams of each substance with the balance, we took the beaker 250ml and we put 90 mL of water, and another beaker 250ml and we put 270 mL of oil. All this have led to a 600ml beaker, slowly pulling the oil and mixed, but be careful because the reaction is exothermic and it heats! Mix a good time, we put the 600mL on a hot plate for heat and this accelerate the reaction. Then we put a few drops of aroma and finally we put the mixture in a few evaporating dish. Now we have to wait for obtain the hard soap.
Now when we have the flavor we wanted, we poured a box of porcelain. Now all that remains hard. And so how does the soap.
The reaction of saponification:
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