Journal . nected to a Buntes burette B. in whichthe gas could be measured and analysed. The currentof a Bunsen battery, afterpassingtheeell,was conductedthrough a copper voltameter, consisting of a copperplate ( as anode, and a platinum dish D as cathode, The copper deposited during this period amountedto 01035grm., which, taking 00003307 as the electro-chemical equivalent of copper, corresponds to 313coulombs (ampere-seconds) of electricity. The amount of hydrogen in the gas corresponds to373x0,8903cc. = 3320cc, and as each cc. correspondsto 87>33 coulombs, the hydrogen only accounts for28
Journal . nected to a Buntes burette B. in whichthe gas could be measured and analysed. The currentof a Bunsen battery, afterpassingtheeell,was conductedthrough a copper voltameter, consisting of a copperplate ( as anode, and a platinum dish D as cathode, The copper deposited during this period amountedto 01035grm., which, taking 00003307 as the electro-chemical equivalent of copper, corresponds to 313coulombs (ampere-seconds) of electricity. The amount of hydrogen in the gas corresponds to373x0,8903cc. = 3320cc, and as each cc. correspondsto 87>33 coulombs, the hydrogen only accounts for283 coulombs. Similarly calculated, the oxygen isequivalent to 602 coulombs, and the chlorine evolvedto 47 coulombs. Consequently, for every 100 coulombs which weremeasured in the copper voltameter, only 904[313 :283 :: 100 :904] evolved their equivalent ofhydrogen, or 100—904=9-6 coulombs passed throughthe electrolytic cell without evolving hydrogen, andsince when no hydrogen is evolved at the cathode, no. containing pure copper sulphate solution three-fifthssaturated as electrolyte; the current afterwards passedjta a galvanometer. I will only trouble youwith the details of one single experiment, as mostof them were carried out in a similar manner. Experiment A«. of magnesium chloridecontaining 870grms. of MgClj per litre was electro-lysed in two successive stages, for both of which theamount of copper deposited and the gases evolvedwere determined separately ; but owing to the smallamount of solution in the cell, this was only analysedafter the second stage. The gas obtained during the lirst stage amountedto 373cc, corrected for temperature and pressure,and consisted of— CM 150 per cent. ii HIT II KI-U3 chlorine or oxygen can be evolved at the anode withmagnesium chloride solution as electrolyte, 96 percent, of the current were ineffective for the produc-tion of chlorine. Another portion of the current—viz., 1925 per cent. [313 : t>02:: 100]— produced o
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
