Question
Air oxidation of Co(II) carbonate and aqueous ammonium chloride gives a pink chloride salt with a ratio of 4NH 3 :Co. On addition of HCl
Air oxidation of Co(II) carbonate and aqueous ammonium chloride gives a pink chloride salt with a ratio of 4NH 3 :Co. On addition of HCl to a solution of this salt, a gas is rapidly evolved and the solution slowly turns violet on heating. Complete evaporation of the violet solution yields CoC1 3 .4NH 3 . When this is heated in concentrated HCI, a green salt can be isolated with composition CoC1 3 .4NH 3 .HC 1 . Write balanced equations for all the transformations occurring after the air oxidation. Give as much information as possible concerning the isomerism occurring and the basis of your reasoning. Is it helpful to know that the form of [Co(Cl) 2 (en) 2 } that is resolvable into enantiomers is violet?
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The hint concerning the color of Coen2C12 is useful because the enantiomerically resolvable form of ...
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Introduction to Chemical Engineering Thermodynamics
Authors: J. M. Smith, H. C. Van Ness, M. M. Abbott
7th edition
71247084, 978-0071247085
