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.

    138/180 (page 122)
    Divide the filtrate into six parts and treat these as follows :— 1. Acidulate with HC1 and add to different portions. (a) BaCl2. White ppt. insoluble in boiling HN03. (b) FeCls. Blue ppt. (turned brown by KOH, colour restored by HC1). Blood-red coloration (bleached by HgCl2). (c) FeS04. Blue ppt. (turned brown by KOH, colour re¬ stored by HC1. H2S04 or H2SiF0 H4Fe(CN)6. HONS. HsFe(CN)6. 2. Acidulate with HN03 and add AgN08. Only regard & precipitate which becomes curdy on boiling and shaking. Precipitate is i. Curdy white. Soluble in strong boiling HN03 and in NH4OH. ii. Curdy white. Insoluble in strong boiling HN03, soluble in NH4OH. iii. Curdy yellowish - white. Soluble in strong NH4OH. iv. Curdy yellow. Insoluble in NH4OH, but turned white by it. HON. HOI. HBr. HI.