A Manual of Chemical Analysis, Qualitative And Quantitative. for the Use of Students
A Manual of Chemical Analysis, Qualitative And Quantitative. for the Use of Students
Noad, Henry Minchin, 1815-1877
The book A Manual of Chemical Analysis, Qualitative And Quantitative. for the Use of Students was written by author Noad, Henry Minchin, 1815-1877 Here you can read free online of A Manual of Chemical Analysis, Qualitative And Quantitative. for the Use of Students book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Manual of Chemical Analysis, Qualitative And Quantitative. for the Use of Students a good or bad book?
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lOO'OO Quantitative estimation as Cyanide. — Cyanide of potassium is added in sufficient quantity to redissolve the precipitate which is at first formed, dilute nitric acid is then added, and a g:entle heat applied, by which the whole of the cyanide of silver is precipitated. It is washed and dried at 212^. The composition of cyanide of silver is — One equivalent of Cy .... 26 . * 19*4 One ditto ofAg . . . 108 . . 806 One ditto of AgCy . . . 134 . . 1000 Silver when combined with organic acids,... is estimated in the metallic state, to which it is reduced by igniting the salt in a porcelain crucible. The heat should be gentle at first and the cover on, to prevent loss during the ignition. The lid is after- wards removed, and a strong heat applied for a considerable time, in order to effect complete combustion of the carbon of the organic acid. Silver is completely separated from all the metals of the first four groups by sulphuretted hydrogen. The solutions must in all cases be acid.
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