. Hydroxylamine : its quantitative determination and some double salts . of nitric acid, andthen electrolysed with a current of .09 amphere and 1,9 volts forfour to five hours. At the end of that time the liquid is tested tosee if copper is all precipitated. If so, the acid solution is si-phoned off and the precipitate of metallic copper washed with hotwater and then alcohol. Dry below 100° and weigh when cool. As thestrength of the titanium solution changes when standing, its strengthhad to be found each time by titration with permanganate. The perman-ganate is :?5= ,000113 g. 0 per The
. Hydroxylamine : its quantitative determination and some double salts . of nitric acid, andthen electrolysed with a current of .09 amphere and 1,9 volts forfour to five hours. At the end of that time the liquid is tested tosee if copper is all precipitated. If so, the acid solution is si-phoned off and the precipitate of metallic copper washed with hotwater and then alcohol. Dry below 100° and weigh when cool. As thestrength of the titanium solution changes when standing, its strengthhad to be found each time by titration with permanganate. The perman-ganate is :?5= ,000113 g. 0 per The follov/ing results were obtained, numbers 3 and 4 were from, thesame sample of crystals. Determination of of Expt. Wt. in g. ?/t. Cu_y\_Wt. in g. ^ of CuSO. fonnula ofCryst, taken found ~v~CuS04 theory found compound 1 .5596 . .1367 2 .0385 .0129 3 ,100P .0331 4 .0708 5 .2205 ,0543 ,3430 .0323 .0828 .0586 .1362 CuSO .NH, OuSO|. +Smith Electro Chem. 58.
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