Abstract— The experiment deals with the chemical reaction called
Saponification, which is used to make soap, a salt. In this experiment, the
experimenter could create an actual soap product while understanding the
Saponification process. Better understanding of the Saponifcation process would
mean better knowledge in the study of chemical reactions.
Keywords— Saponification, chemical reaction, salt, process, soap.
I.
Introduction
Soaps are one of the most common
commodities in life. It is used as a surfactant for washing, bathing, and
cleansing. The creation of soap has been going on for more than centuries,
starting from the Romans up until now. The process remains unchanged and this
process is called Saponification.
Saponification is a chemical reaction between
a base and an acid. That being said, this experiment was done in order to
observe and explain the Saponification process, and to come up with an actual
soap product.
II.
Materials and Method
A.
Materials
· Laboratory Materials
Ø 2 500 mL Beakers
Ø 1 100 mL Graduated Cylinder
Ø 1 Thermometer
Ø 1 Stirring Rod
Ø 1 Timer
Ø 1 Plastic Basin
Ø 1 Stainless Steel Bowl
Ø 1 Hot Plate
· Other Materials
Ø 10g Lye
Ø 77mL Cooking Oil/Vegetable Oil
Ø 1 Plastic Mold
Ø Rubber gloves
Ø Distilled Water
B.
Procedure
Ø First, the experimenter poured the cooking oil/vegetable oil unto
the graduated cylinder, to get the exact measurement of 77mL.
Ø After measuring, the experimenter placed the 77mL cooking
oil/vegetable in a beaker and then heated it using the hot plate until it
reached 60 Celsius; this was to make sure that the 77mL cooking oil/vegetable
oil would still be in prime temperature, 50 Celsius, when it is finally mixed
with the Lye. The temperature was measured using the thermometer.
Ø Next, the experimenter had to measure 23mL of distilled water using
the graduated cylinder. The graduated cylinder must be clean of the remnants
from step one.
Ø The experimenter then, in a separate beaker, dissolved the 10 grams
of Lye in the 23mL distilled water from step three by gradually dropping the
Lye and stirring the solution, using the stirring rod. Once the Lye was
dissolved its temperature was 50 Celsius. The temperature was measured using
the thermometer.
Ø After that, the experimenter had to transfer the heated oil in a
plastic basin; once both mixtures have the same temperature of 50 Celsius.
Then, the experimenter gradually poured the Lye solution in the basin and stirred
it consistently for 11 minutes.
Ø The experimenter, after the mixture had thickened, then transferred
the mixture into the plastic mold and let it set for about 24-48 hours.
C.
Safety Precautions
Ø Lye is a caustic chemical that can burn one’s skin. Protective
clothing must be worn.
Ø The experimenters should have vinegar by their side. As to neutralize
the Lye if ever it spills or comes in contact with skin.
Ø Dispose the chemical substances in the proper containers.
Ø Handle the laboratory apparatuses with care so as not to break it.
III.
Results
After performing the experiment, the
following data were collected.
TABLE I
Observations
Time Elapsed
|
|
|
|
6 minutes
|
Yellowish
|
Very watery
|
7 minutes
|
Yellowish
|
Watery
|
9 minutes
|
Light yellow
|
Less watery
|
11 minutes
|
Light yellow
|
Slightly thick
|
IV. Analysis and Discussion
The
whole process of Saponification basically revolves around the base and the
acid, which when combined forms a salt. For this experiment, Saponification is
shown via the combination of canola oil, an acid, and lye, a base, to then
create soap, which is a salt.
This entire process involves a lot of thinking
before the actual experiment. The reason to this is because one must always
have to consider the makeup of the acid and the base being used.
The base should always have one hydroxide ion.
Hydroxide ion is a negatively charged molecule which when dissolved in water is
an incredibly strong base. That is why the experimenters used lye. Lye is made
up of one sodium ion and one hydroxide ion, the sodium ion though is not
involved in the reaction.
The acid, on the other hand, can take form into
different types but either way most types of acids will react with the base, then
causing the reactants to saponify. Each types of acid, though, reacts differently
to the base, lye.
The amount of base needed in order for it to
react with the given acid depends on the acid’s chemical makeup. The reaction
happens, however, only when the mixture is being stirred. As the mixture is
being stirred, the acid and the base then finally react and first creates the
chemical reaction called glycerol, which produces glycerin, a skin nourishing
agent, and then allows the fatty acids to combine with the hydroxide ion of the
base, which creates the chemical reaction, Saponification, and causes soap to
be formed.
This experiment highly relies in the stirring
of the acid and base mixture, for the stirring is what causes the reactants to
react. The longer the mixture is
stirred, the thicker the mixture gets, and the more time the two reactants get
to react.
That being said, one of the errors committed in
this experiment by the experimenters is their short amount of time focused in
stirring. Because of that the consistency of the mixture is not very thick. Their
lack of time was caused by their late start in combining the acid and the base.
Therefore, the future experimenters who will
also do this experiment should have good time management and clear details of
how they are going to proceed with the experiment. Good time management would
lead to more time allotted to stirring the mixtures which will then give more
time for the reactants to react which will lead to a thicker consistency for
the mixture and a better result or product.
V. Conclusions
With
the observations and newfound knowledge gathered, the experimenter who wrote
this lab report therefore concludes that the Saponification process involves a
lot of pre-experimental thinking and time management. Due to this experiment,
the experimenter has learned a lot about Saponification and lastly, the
experimenter was able to create soap.
References
[1]
Study.com. (n.d.). Hydroxide ion: definition and formula. Retrieved March 13,
2016, from http://study.com/academy/lesson/hydroxide-ion-definition-formula.html.
[3]
Hoegger Goat Supply. (2011). Saponification
explained. Retrieved March 13, 2016, from http://hoeggerfarmyard.com/the-farmyard/soap-making-2/saponification-explained/.
[4]
Soap Making Resource. (n.d). Soap safety guide. Retrieved March 13, 2016, from http://www.soap-making-resource.com/soap-safety.html.
[5]
Soap Making Resource. (n.d.). Cold process soap making tutorial a lesson in lye
soap making. Retrieved March 13, 2016, from http://www.soap-making-resource.com/cold-process-soap-making.html.