QuestionCoordination chemistry / Werner's theory
Werner confirmed the presence of primary and secondary valencies in the coordination compounds CoCl₃·6NH₃, CoCl₃·5NH₃ and CoCl₃·4NH₃ by
- (a) treating cold aqueous solutions of cobalt complexes with excess of silver nitrate solution
- (b) treating cold aqueous solutions of cobalt complexes with excess of barium nitrate solution
- (c) treating cold aqueous solutions of cobalt complexes with excess of barium chloride solution
- (d) treating cold aqueous solutions of cobalt complexes with excess of sodium nitrate solution
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