The ratio of NaOH and KOH needed to produce soap is shown in Table 2. According
ID: 967604 • Letter: T
Question
The ratio of NaOH and KOH needed to produce soap is shown in Table 2.
According to the table, if a person wanted to make soap from 20.0 oz. of olive oil, then 2.68 oz of NaOH would be needed during the saponification process.
20.0 oz. olive oil x 0.134 = 2.7 oz. of NaOH needed
Alternately, if KOH is to be used, then 3.80 oz. of KOH are required.
20.0 oz. olive oil x 0.190 = 3.8 oz. of KOH needed
Table 2. Saponification values and NaOH/ KOH required for saponification.
Substance
Saponification Value
NaOH Ratio
KOH Ratio
Beeswax
96
0.067
0.095
Extra Virgin Olive Oil
190
0.135
0.190
Pumpkin Seed Oil
195
0.132
0.186
Palm Kernel Oil
220
0.155
0.218
Coconut Oil
257
0.181
0.256
Question: If 50 mL of pumpkin seed oil is to be made into soap, what volume of NaOH would be required? (Be sure to include units in your answer.)
Substance
Saponification Value
NaOH Ratio
KOH Ratio
Beeswax
96
0.067
0.095
Extra Virgin Olive Oil
190
0.135
0.190
Pumpkin Seed Oil
195
0.132
0.186
Palm Kernel Oil
220
0.155
0.218
Coconut Oil
257
0.181
0.256
Explanation / Answer
50 ml pumpkin oil is approximate 1.69 oz
hence Naoh required is 1.69*0.132=0.223 oz
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