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.

    170/180 (page 154)
    10. Mixture containing' two bases and two acids. Pink crystalline deliquescent substance, soluble in water. Preliminary Examination. Experiment. Observation. Inference. Heated in bulb-tube. Water of crystalliza- Chloride—probably tion evolved. Then MnCl2 from col- HC1. our of salt. „ with HC1. — ,, cone. H2SO4. HC1 evolved. Chloride. ,, on charcoal with Na2C03 and Green mass. Mn. a little KN03. ,, on platinum wire. 1 ■ Wet Examination for Bases. Added HC1 to aqueous solution. No pp. Gp. I. absent. »> h.2s. ,, ,, 5? Gp. II. absent. Boiled original solution with a little Gp. IH. absent. HNO3. Added AmCl+AmOH. Added Am2S to part of alkaline solu- Black pp. Ni or Co and pos- tion. sibly Mn or Zn. • Added remainder of alkaline solution and more Am2S. Filtered. Added AirioCO-j. No pp. Gp. V. absent. Added Na2HP04. >1 Mg absent. Digested Gp. IV. pp. with very dilute HC1 in the cold. Filtered. Digested filtrate with KCIO3 and evaporated to small bulk. Added excess of NaOH. Dirty-coloured pp. Mn. Tried borax bead test with Mn pp. Amethyst colora¬ tion when cold. Mn. Warmed part of Gp. IV. pp. insol. in dil. HC1 with cone. HCI+KCIO3. Green solution. Ni. Boiled solution nearly to dryness to expel HC1. Nearly neutralized with Na2CC>3 and added KCN till the pp. first formed just redis¬ solved. Boiled. Allowed to cool. Added NaOH+Br and warmed gently. Black pp. Ni. Tried borax bead test with small In the outer flame portion of black pp. violet-brown when hot; yel- low when cold. Ni. Examination for Acids. .1 Added BaCl2 to aqueous solution. White pp. insol. in HC1. Sulphate. Added HN03+AgN03. White pp. sol. in ammonia. Chloride. Heated solid substance with Mn02+ Yellowish-green gas Chloride. cone. H2S04. evolved smelling like chlorine and bleaching moist litmus paper. Metals found—Ni, Mn. Acid radicles— S04, Cl.