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.

    105/180 (page 89)
    Observation. Inference. (■b) Brown fumes of N02. (c) NH3 (smell and alkaline reaction). (d) Yiolet vapours of iodine. (e) C02 (lime-water test). (f) 01 (bleaching action, smell and colour). (g) Br (smell and colour). / Nitrates of heavy metals, ( Pb, Bi, Hg, etc. Salts of NH4, combined with a non-volatile acid. Iodides. f Carbonates (except those ( of the alkalies). Hypochlorites and some chlorides and chlorates. /Some bromides and \ bromates. (h) S02(smell). (i) C2N2 (smell, rose-) coloured flame.) J (k) Burnt sugar smell and) immediate blackening./ (Sulphites, sulphur com- \ pounds. Cyanides of heavy metals. Tartrates* III. Heat a portion of the substance on charcoal in the outer blowpipe flame. 1. It decrepitates. NaCl, KI, etc* 2. It fuses and sinks into the charcoal. Alkaline salts. 3. It deflagrates. J Chlorates, nitrates and ( certain oxides. 4. A white mass remains, highly luminous while heated. Alkaline earths, A1203, Si02, ZnO, Sn02. 5. A coloured residue is left\ on the charcoal. j Cu, Co, Ni, Mn, Fe, Cr. 6. White fumes are given off. /Hg, As, Sb, and NH4 \ compounds.