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.

    104/180 (page 88)
    Observation. (a) Yellow while hot, white\ on cooling. j (b) From white to ye lowishA brown when hot, dirty light - yellow on cooling. (c) Dark red while hot, yel-\ lowish-brown on cooling, f (d) From white to orange\ and reddish-b'own, dull I yellow on cooling, fusible j at an intense heat. J (e) From yellow to reddish-1 brown while hot, yellow I when cold, fusible at a red f heat. J 3. The substance gives off water with or without fusion. 4. The substance ffrst swells up and then shrinks. 5. The substance volatilizes! and condenses as a sublimate j- in the upper part of the tube—J (a) Reddish drops, yellow\ when cold. J (b) Black sublimate, which! becomes red on rubbing./ (c) Yellow sublimate. {d) Sublimate of small white\ octahedral crystals, j 6. A gas is evolved— (a) O (test with glowing'} splinter), J Inference. ZnO, Sb406. Sn02. Fe208. Bi208. PbO. Salts containing water of crystallization ; also acid salts (e.g. NaHC03) Alums, phosphates, bo¬ rates. S, Hg, As, Sb, NH4. Sulphur or a sulphide. HgS. AsgSg, Hgl2. As406. Chlorates, nitrates, per¬ oxides.