. An introductory course of lessons and exercises in chemistry (rewritten 1919). learned through the experi-ments above, the following quantitative data concernin, :: _ :is dee and her re g wen for convenient reference. At 0: C. and under 1 atmosphere pressure pure3 in water with which it is in contact to theapproximately 4 volumes of the gas in 100 volumes ofThe solubility - see is given by volume instead of byaht becat;- solubility of gas by volume is always - same irrespective of the extent to which it may be compr •Hows, of course, that the solubility by weightrferent with different pressA
. An introductory course of lessons and exercises in chemistry (rewritten 1919). learned through the experi-ments above, the following quantitative data concernin, :: _ :is dee and her re g wen for convenient reference. At 0: C. and under 1 atmosphere pressure pure3 in water with which it is in contact to theapproximately 4 volumes of the gas in 100 volumes ofThe solubility - see is given by volume instead of byaht becat;- solubility of gas by volume is always - same irrespective of the extent to which it may be compr •Hows, of course, that the solubility by weightrferent with different pressA iter oi oxygen - and under 1 atmosphere press _ grams is si _htly heavier than air because four- a of the ail s gas— g en—which is seven-eighths as heavy _n. becomes a liquid at —118° C. and a pressure of 50 at-mosphere- lower tempera* res t liquefies, r remainsliquid, under lesser pr 8. The Proportion by Volume of the Oxygen in the Air (AfterCooler). Id order to determine the volume o: a gas, air for example., a solution of potassium pyrogallate is employed to ab-. sori the :::~_ n I leoease in volume is the volume of thez in the Experiment.—Secure a large test-tube or any slender, cylindrical ves-sel of 60-81 :. capacity, and fit it with a two-hole rubber stopper. Into Chapter II 23 one liole push a short glass nozzle, and into the other a well-fitting plugof glass rodding. Secure a glass funnel, rubber tube, and pinch clampand fit up the apparatus as shown in the accompanying figure. Test theapparatus to ascertain that it is air-tight. Secure 3 of a solution of pyrogallic acid, and 22 of a solutionof potassium hydroxide, both of which have been prepared specially forthis purpose, as follows: the first by dissolving 10 grams of pyrogallicacid in 30 of water, and the second by dissolving 240 grams of potas-sium hydroxide in 160 of water. (This will furnish enough for aboutten experiments.) When ready to perform the experiment, mix the two soluti
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