Elementary Applied Chemistry (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 Excerpt: ...of the tables (pp. 66-75). Repeat the experiment by weighing exactly 100 g. of the sample in a tared flask or beaker. Transfer to a retort and distil as before. Make the distillate up to 100 g. with distilled water. Take the specific gravity. From this determine, by means 1 The student will find helpful references to alcohol in the following publications: Popular Science Monthly: "History of Alcohol," Vol. LI, p. 231; "Physiology of Alcohol," Vol. L, p. 796; "Natural Production of Alcohol," Vol. XIX, p. 238; "Discovery and Distillation of Alcohol," Vol. XLIII, p. 85; "Use of Alcohol in Medicine," Vol. XXXVIII, p. 86; "Vinous Superstitions," Vol. XXIV, p. 234; "Pigs as Wine Bibbers," Vol. XXIV, p. 426. Farmers' Bulletin No. 868, United States Department of Agriculture. of the tables, the per cent of alcohol by weight. Discover any mathematical sequence in the alcohol tables (pp. 66-75). Suggestions. Always carefully rinse the vessel containing the measured amount of the sample into the retort, using about half its volume of water. Determine the temperature of the distillate at which you take the specific gravity and correct to 60 F. or 15 C. For all temperatures above these standards subtract.00080 for each Centigrade degree or.00044 for each Fahrenheit degree. For all temperatures below these standards the cor-rection is additive. If, for this work, pupils are encouraged to bring samples from home, the results will often be Fig. 15. Apparatus for determining the per cent of alcohol a revelation not only to themselves but also to their parents. Determination of the Per Cent of Alcohol by Difference in Specific Gravity. This method, suggested by Leach, gives approximate results. Use the pre...