12.R: Making Soap Saponification (Report)
- Page ID
- 306796
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Part A: Synthesized Soap
- Describe the color, texture and appearance of synthesized soap:
- Does it smell like any soap that you have used?
Part B: Properties of Soaps and Detergents
| Synthesized Soap | Commercial Soap | Commercial Detergent | |
|---|---|---|---|
| pH | |||
| Emulsification test | |||
| Ca2+ | |||
| Fe3+ | |||
| Mg2+ |
Post-lab Questions
- The saponification reaction occurs between an ester and a base, shown in the figure in the procedure. In the reaction you performed, what is the ester and what is the base?
- The base used in the saponification reaction must always contain a hydroxide ion. What bases are most commonly used for this reaction?
- The products of the reaction are glycerol and a crude soap. The chemical formula of the soap is CH3(CH2)14COONa+. Draw the line-angle structure. Circle the portion of the molecule that is water-soluble and box the portion of the molecule that is fat-soluble. Why is the circle portion water-soluble? Why is the box portion fat- soluble?
- During lab section, why did the saponification reaction require the long period of stirring?
- Do you think that the type of fat used will make a difference in the product? Why or why not?