The Chemistry Of Plant And Animal Life by Harry Snyder

The Chemistry Of Plant And Animal Life

byHarry Snyder

Paperback | October 12, 2012

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 edition. Excerpt: ...pan.) Add this solution to the evaporator, stirring constantly, and leave the evaporator on the warm sand-bath, with a low flame underneath, for 40 to 50 minutes. Then place on the sand-bath in the desk until the following day when a good soap should have formed. Dissolve a little of the soap thus produced in a test-tube with 20 cc. water. Divide the solution into two parts; to one add a little salt, and to the other a few drops of HC1. Questions, (i) Why was NaOH used in this experiment, and what portion of the fat did it replace? (2) What other.materials could be used in place of NaOH? (3) What influence did the salt have upon the soap solution? (4) What was the result when HC1 was added to the soap solution? (5) Why is it necessary to weigh both the lard and the NaOH? (6) What would be the result if the fat and alkali were taken in different proportions from those used in this experiment? (7) Why does soap form an insoluble mass with hard waters? 268. Fatty Acids--Formic acid, found in pine needles and in red ants, has the formula H2CO3 which is also written HCO.,H. Acetic acid has the formula H.CH2. CO2H, and differs from formic acid simply in containing CH2 more than found in formic acid. If CH2 were added to acetic acid, H.C2H4.CO--H, propionic acid would be produced. This is present in some plants. In like manner-, butyric acid can be produced from propionic acid. By the addition of CH2, about twenty acids can be formed in the way described. This list includes palmitic, stearic and other acids found in fatty bodies and named fatty acids; various of these are present in nearly all foods. When a series of compounds, like the fatty acids, shows a uniform difference between two adjacent members the term homologous series is employed....

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Title:The Chemistry Of Plant And Animal LifeFormat:PaperbackDimensions:92 pages, 9.69 × 7.44 × 0.19 inPublished:October 12, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217379990

ISBN - 13:9780217379991

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