EXPERIMENT 1: SAPONIFICATION OF VEGETABLE OIL Data Sheet Solution Table 1. Soap pH Results pH Phenolphthalein Color ΝΙΑ Deep purple red Your Soap (Pre-NaCl) Your Soap (Post-NaCl) 9 Purple red Commercial Soap 8 Purple red Laundry Detergent 9 N/A Table 2. Hard Water Titration Results Titrant Volume to Lather Volume to Lather Volume to Lather CaCl2 (mL) MgSO4 (mL) Tap Water (mL) Laundry Detergent Solution (Initial) 10 8 Laundry Detergent Solution (Final) 9 8 7 Your Soap Solution (Initial) 10 7 4 Your Soap Solution (Final) 7 11 Volumes of soap solution (titrant) required to lather hard water solutions: (Show Work Here)
Volumes of soap solution (titrant) required to lather hard water solutions: (Show Work Here) -Page Break Post-Lab Questions 1. Calculate the volume of each soapy solution required to lather each hard water solution. How do these results compare to your own tap water? Show your work in the space below Table 2. 2. Describe the differences between the three types of detergent described in the introductory content 3. Describe the differences between the types of micelles that would be produced from a soap vs. a cationic detergent. Where would hydrogen bonds form in each case? 4. How would the types of micelles in question 3 differ from those formed by a nonionic detergent, such as those found in toilet bowl cleaners? Answer in terms of intermolecular forces. 5. What is the purpose of detergent additives? Give an example of their mechanism of action, and one pro and one con to their use.
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