Open AccessThe change in the absorption spectrum of cobalt chloride in aqueous hydrochloric acid solution with change of temperature
Author(s) -
Owen Rhys Howell,
Albert Jackson
Publication year - 1936
Publication title -
proceedings of the royal society of london. series a, mathematical and physical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.814
H-Index - 135
eISSN - 2053-9169
pISSN - 0080-4630
DOI - 10.1098/rspa.1936.0082
Subject(s) - hydrochloric acid , aqueous solution , cobalt , chemistry , chloride , absorption (acoustics) , chlorine , inorganic chemistry , absorption spectroscopy , nuclear chemistry , materials science , organic chemistry , physics , quantum mechanics , composite material
The change in the absorption spectrum of cobalt chloride in aqueous solution with increasing concentration of hydrochloric acid at constant temperature (20° C) has already been investigated.* It was shown that with increasing concentration of acid up to 5N HCl, no blue constituent was formed. The cobalt atom, therefore, retains its six grouping over this range. The effect of increasing acid concentration is to replace two molecules of water by two atoms of chlorine: [Co(H2 O)6 ] → [Co(H2 O)4 Cl2 ].