. An introductory course of lessons and exercises in chemistry (rewritten 1919). nd H2S formation of a white precipitate (ZnS) shows that zinc has beendissolved; i. e., changed to a salt. The reaction in the mixture above is— Zn°4-CuS04=ZnS0,+Cu° or Zn°+Cu++=:Zn++-f-Cu0 This reaction is evidently the sum of the two reactions— Zn°=Zn++-f2(—) Cu+++2(—)=Cu° which are the two pole actions that take place in the cell formedby coupling of the copper pole (No. 21) with the zinc pole (). This test-tube with zinc and copper solution contains allthe parts necessary for the action of the ce
. An introductory course of lessons and exercises in chemistry (rewritten 1919). nd H2S formation of a white precipitate (ZnS) shows that zinc has beendissolved; i. e., changed to a salt. The reaction in the mixture above is— Zn°4-CuS04=ZnS0,+Cu° or Zn°+Cu++=:Zn++-f-Cu0 This reaction is evidently the sum of the two reactions— Zn°=Zn++-f2(—) Cu+++2(—)=Cu° which are the two pole actions that take place in the cell formedby coupling of the copper pole (No. 21) with the zinc pole (). This test-tube with zinc and copper solution contains allthe parts necessary for the action of the cell, because in thiscell only zinc and copper ions are changed. If we imagine thetwo poles and pole liquids in the preceding figure (a) broughttogether until the two porous cups become one and the polestouch, then no connecting wire is needed, the salt solution be-tween the cups also is unnecessary, and the cup contains just thematerials in the test-tube above; hence the test-tube above con-tains all necessary parts of the whole cell, and the same forces n: ?-L,. = Lv - . - - —i: :: ::- • : ~, 1- li ?-!_• i:~ : i -
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectchemistry, bookyear19
