Anjaline wrote: ↑Thu Oct 19, 2023 11:49 pm
How cobalt acetate react with thiourea?
The reaction between cobalt acetate and thiourea is a complex one that has been the subject of much study. The exact products of the reaction depend on the reaction conditions, such as the temperature, the concentration of the reactants, and the presence of other reagents. However, some general observations can be made.
At room temperature, cobalt acetate and thiourea react to form a dark brown precipitate. This precipitate is thought to be a complex of cobalt(II) with thiourea and acetate ions. The exact composition of the precipitate is not known, but it is likely to be a mixture of different species. The reaction is thought to proceed through the following steps:
Co(OAc)
2 + 2SC(NH
2)
2 → Co(SC(NH
2)
2)
2 + 2OAc-
The cobalt(II) ions are then coordinated by the thiourea molecules to form the precipitate. The acetate ions are released into the solution.
The reaction between cobalt acetate and thiourea can be accelerated by heating the reaction mixture. At higher temperatures, the precipitate dissolves to form a clear yellow solution. This solution is thought to contain a complex of cobalt(III) with thiourea and acetate ions. The exact composition of the complex is not known, but it is likely to be a mixture of different species. The reaction is thought to proceed through the following steps:
Co(OAc)
2 + 2SC(NH
2)
2 + heat → Co(SC(NH
2)
2)
3 + 2OAc-
The cobalt(II) ions are oxidized to cobalt(III) ions by the thiourea molecules. The acetate ions are released into the solution.
The reaction between cobalt acetate and thiourea is a reversible reaction. The complex of cobalt(III) with thiourea and acetate ions can be decomposed by cooling the reaction mixture. This will result in the formation of a precipitate of cobalt(II) sulfide and the release of thiourea and acetate ions into the solution.
Co(SC(NH
2)
2)
3 → CoS + 3SC(NH
2)
2
The reaction between cobalt acetate and thiourea is a complex one that depends on the reaction conditions. The exact products of the reaction depend on the temperature, the concentration of the reactants, and the presence of other reagents.