Volume 2

The elements of experimental chemistry / by William Henry.

  • Henry, William, 1774-1836.
Date:
1815
Catalogue details

Licence: Public Domain Mark

Credit: The elements of experimental chemistry / by William Henry. Source: Wellcome Collection.

Provider: This material has been provided by King’s College London. The original may be consulted at King’s College London.

    155/586 (page 137)
    Acetate of lead consists of Acid 26 100 Yellow oxide,... 58 22* Water 16 100 By boiling in water a solution of 100 parts of acetate and 150 of finely pulverized litharge, the acetate passes to the state of sub-acetate. The taste of this salt is less sweet; it is less soluble in water; and ci'ystaliizes in plates. It is, composed, according to Thenard, of Acid 17 100 Yellow oxide... .78 460 Water 5 100 The oxld© in the sub-acetate is, therefore, so neai-ly double in the acetate, that we may consider the composition of these salts as furnishing an additional example of the law of simple multiples. All the solutions of lead are decomposed by sulphuretted hydrogen and by alkaline hydro-sulphurets. Hence these compounds are excellent tests of the presence of lead in wine or any other liquor, thscovering it by a dark-coloured pre- cipitate. Hence, tdso, characters traced with solution of acetate of lead, become legible when exposed to sulphuretted hydrogen gas. The same property explains, too, tlie effect of alkaUno hydro-sulphurets m blackcniug the glass bottles, in which they are kept. The effect is owing to the action of the sulphuretted hydrogen, on the oxide of lead which all white glass contains. VIII. The yellow oxide of lead unites with phosphoric acid, either directly or by mixing the solutions of a neutral alkaline phosphate and of nitrate or acetate of lead. The compound is insoluble and is composed, according to Ber- zelius, of