Experiment 7 Saponification

Experiment 7 Saponification - however satisfy our cleansing...

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Anna McCarthy Lab # 7: Saponification Lisa Rubino Thursday 9:00am-10:50am When we dissolved the piece of soap in 5 ml of distilled water and added 4 drops of phenolphthalein it appeared pink which indicated that the solution was basic. The basicity of the solution was due to the NaOH group. When we repeated the experiment with the Ivory Soap the phenolphthalein still gave the solution a pink color but it was a lighter color. This was due to the fact that the Ivory Soap was more pure so the NaOH concentration wouldn’t be as high giving it a lesser basicity. When we washed our hands with the soap it was more slippery than regular soap because of the NaOH. It did
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Unformatted text preview: however satisfy our cleansing standards. When we added a small portion of our soap to the distilled water and shook it up there was a lot of foam. This was due to the fact that there were not a lot of impurities. When the soap was added to the tap water there werent as many bubbles because the tap water had some impurities. After we added the soap to the calcium chloride no bubbles formed. The concentrated salt solution was used to wash the crude soap rather than distilled or tap water because the NaCl keeps the NaOH or fatty acid from dissolving....
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This note was uploaded on 04/21/2008 for the course CHEM 121 taught by Professor Antol during the Fall '06 term at Notre Dame.

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