Researches into the laws of chemical affinity / by C.L. Berthollet ; Translated from the French by M. Farrell.

  • Berthollet, Claude-Louis, 1748-1822.
Date:
1804
Catalogue details

Licence: Public Domain Mark

Credit: Researches into the laws of chemical affinity / by C.L. Berthollet ; Translated from the French by M. Farrell. Source: Wellcome Collection.

    196/220 (page 190)
    1Q0 make some further observations on these sul - phates. If Fourcroy’s process be followed, that is, if concentrated sulphuric acid be boiled with mercury, without carrying the ebullition to perfect desiccation, a white mass will be ob¬ tained, composed of mild sulphate of mercury and oxygenated sulphate : by washing this mass carefully as he prescribes, the excess of acid, which has some influence on the mild sul- V. phate, but a still greater on the oxygenated sulphate, may be separated. - ) When the operation is pushed further, or * * , f r when the sulphate is exposed to a sufficient degree of heat, a considerable quantity of sul¬ phureous acid is disengaged ; the mercury be¬ comes too much oxygenated to form a mild i t sulphate, and the whole will be changed to the state of oxygenated sulphate, the properties of which vary according to the quantity of acid which it retains : let us examine the state of the sulphate when the operation has been carried /