Manual of qualitative analysis / by Robert Galloway.

  • Galloway, Robert.
Date:
1861
Catalogue details

Licence: Public Domain Mark

Credit: Manual of qualitative analysis / by Robert Galloway. Source: Wellcome Collection.

    167/272 (page 149)
    GRY et the, CHAPTER IV. THe GENERAL PROPERTIES OF THE ACIDS. 358. Axx acids belong to one of two grand classes, which are distinguished by the terms Organic and Inorganic. 359. The striking characteristic of the organic class of acids is the separation of charcoal which attends their de- composition by heat, along with the conversion of the bases with which they were combined (if alkalies or alkaline earths) into carbonates. 360. Acids do not admit of that accurate classification into groups which is the case with bases, many of them being members of more than one group. INORGANIC ACIDS. 361. The imorganic acids treated of in the present work are divided into six groups. 362. First Group.—The acids in this division are not only gaseous in their free state, but their affinity for bases is like- wise feeble; their salts are therefore decomposed by most acids, the decomposition being attended with effervescence, owing to the liberated acid assuming the gaseous state. On this account they are always discovered at the very com- mencement of an analysis; for an evolution of gas must take place, when hydrochloric acid is added to test for the first section of the sixth group of bases, if these acids are present. The evolved gas must be examined—l, By the smell ; 2, by paper moistened with a solution of acetate of