The Scientific Foundations of Analytical Chemistry Treated in An Elementary Mann
The Scientific Foundations of Analytical Chemistry Treated in An Elementary Mann
Wilhelm Ostwald
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The ratio depends upon the nature of the substance and the temperature. All gases dissolve in water, alcohol, and similar liquids, albeit in most cases to only a slight extent. The degree of solubility of gases in mercury is excessively small, and the latter metal is therefore made use of in accurate gas analysis. But that this does not apply to all liquid metals is shown by the behaviour of molten silver, which dissolves oxygen readily, giving the gas up again as it cools, with the phenomenon ...of " spitting. " In order to produce a solution in a condition of in SOLUTIONS OF GASES 41 equilibrium, i. E. A saturated solution, it is necessary to bring the largest possible surface of gas and liquid into contact, and to disseminate the dissolved substance throughout the liquid, this being effected by passing the gas in very small bubbles, shaking the liquid, and other mechanical means. In most cases what we want is not so much a saturated solution, as to attain to the most perfect absorption practicable.
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