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. 1897 Excerpt: ...When they are insoluble in water, they should be brought into a suitable condition for the action of the current by means of acids, alkalies, etc. An advantage in many electrolytic processes is found in maintaining a thorough agitation of the electrolyte; this can be effected by circulation or by mechanical means. It ...
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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. 1897 Excerpt: ...When they are insoluble in water, they should be brought into a suitable condition for the action of the current by means of acids, alkalies, etc. An advantage in many electrolytic processes is found in maintaining a thorough agitation of the electrolyte; this can be effected by circulation or by mechanical means. It is in electrometallurgy particularly that a more or less complete circulation of the liquor plays an important role. The regulating resistance R is first thrown into the circuit. It is followed by A--an apparatus intended to measure the current strength. This is either a technical amperemeter, a galvanometer, or the shunt of a galvanometer. If the experiment is to be carried out quantitatively, the ampere-hour meter is next inserted; it is the copper voltameter K. The current is then introduced and passes through the experimental cell V, the screw-clamp U, used to interrupt the current, and then back to the battery. To ascertain the pressure in the experimental cell the instrument S is attached to the two electrodes by means of a thin copper wire. This instrument is either a volt meter or a torsion galvanometer, provided with a series resistance. The latter instrument can be used both for the measurement of current and of pressure, by attaching its conducting wires to the shunt-resistance N or to the series resistance W, in connection with the experimental cell (Figs. 17 and 18). All such aids as are used in a chemical examination of the precipitates, solutions, and gases arising in an electrolytic experiment, are to be considered as a part of the necessary outfit. C. PHENOMENA ARISING IN ELECTROLYSIS. PRESSURE OF DECOMPOSITION. POLARIZING CURRENTS. When water acidified with sulphuric acid is electrolysed with insoluble anodes and a varying ele...
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