. The chemistry of plant and animal life. Agricultural chemistry. CHAPTER VIII Water 59. Chemical Composition. — That water is composed of hydrogen and oxygen in approximately the proportion of 2 volumes of H to 1 of O can be demonstrated by pass- ing a current of electricity through water and collecting the escaping gases. Oxy- gen is liberated at the positive electrode, while hydrogen is liberated at the nega- tive electrode. That water is composed of 16 parts, by weight, of oxygen, to 2 parts, by weight, of hydrogen, can be demonstrated by passing hydrogen gas over copper oxid heated in a t
. The chemistry of plant and animal life. Agricultural chemistry. CHAPTER VIII Water 59. Chemical Composition. — That water is composed of hydrogen and oxygen in approximately the proportion of 2 volumes of H to 1 of O can be demonstrated by pass- ing a current of electricity through water and collecting the escaping gases. Oxy- gen is liberated at the positive electrode, while hydrogen is liberated at the nega- tive electrode. That water is composed of 16 parts, by weight, of oxygen, to 2 parts, by weight, of hydrogen, can be demonstrated by passing hydrogen gas over copper oxid heated in a tube. The reaction which takes place is CuO + 2 H = H20 + Cu. If suitable provisions are made for weighing the oxid of copper used, and the water produced, it will be found that the weight of the water bears definite relation to the amount of oxid of copper reduced. For every loss of 16 grams of oxygen from the copper oxid, 18 grams of water are obtained, showing that water is eight ninths, by weight, Fig. 28. —Electrol- ysis of water. Experiment 8. — Distillation of water. Connect flask A (Fig. 29) with the bent tube B to the condensing apparatus issued for this experiment. Place the distilling flask upon the sand bath and in position as shown in Fig. 29. Fill the tank of the distilling apparatus, and half fill the flask, with water. Apply heat to the 54. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Snyder, Harry, 1867-1927. New York, The Macmillan company
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