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.

    108/180 (page 92)
    VII. If the substance is coloured, heat on borax bead. Observation. Inference. Oxidizing Flame. Reducing Flame. Green. Green. Cr. Yellow (cold), brown (hot) Dirty green, olive. Fe. Amethyst. Colourless. Mn. Violet (hot) to yellow-brown (cold). Grey and opaque. Ni. Blue. Blue. Co. Green (hot), blue (cold). Colourless or red. Cu. Black (too much of the substance has been used). VIII. Heat a small quantity of the substance in a test- tube with a little dilute HC1. Inference. Observation. 1. A gas is evolved—- (a) C09 (lime-water test). (b) H0S (smell, and lead ace¬ tate paper test). (c) S02 (smell of burning sulphur). (d) S0.2 and separation of yellow sulphur. (e) Cl (smell, and bleaching test). (/) HCN (smell of bitter almonds). (<g) N02 (colour and smell). 2. Smell like that of vinegar. Carbonates. Sulphides, except those of the metals of Groups I. and II. h2so3. h2s2o3. Oxidizing agents, e.g.> chromates, chlorates, peroxides, HCIO. Cyanides. Nitrite. Acetate.