Qualitative analysis / by William Briggs and R.W. Stewart.

  • William Briggs
Date:
1913
Catalogue details

Licence: Public Domain Mark

Credit: Qualitative analysis / by William Briggs and R.W. Stewart. Source: Wellcome Collection.

    159/180 (page 143)
    Dissolve and Most oxides and Insoluble resi¬ evolve no gas. . • salts. - due. ; C, S, I, and above metals. SnOo,Sb.?Oo, and Af203, Fe203. Cr203 if ignited, or mineral chlorides, bromides, and iodides of Ag, Hg(ous), Pb. Compounds of Bi, Pb, Ba, Sr, Ca. VI. Special tests. If there is evidence of the presence of a metal, (1) Warm gently with, concentrated nitric acid. C, S, P, I. Bed peroxide of nitrogen evolved. Metals and sul¬ Non-metals also phides ; with give rise to sulphides red fumes. there is usu¬ ally also a separation of sulphur, which floats op the sur- i face. \ (2) Immerse in a solution of copper sulphate. Bed coaling off metallic copper. L’1” ~ ‘ i J metals. If there is evidence of a sulphide, apply the following test :— (3) Mix intimately with Na2C03 and heat. Place on a silver coin and moisten with a little water. Brown stain | Sulphides. forms. \