Abstract
The reaction of nickel(II) hydroxide and a mixed ammonia–carbonate solution to form nickel(II) aqua–ammonia complexes is studied in the temperature range of 20–40°C. Experiments show that the dissolution proceeds via the formation of an intermediate in the form of hydrated nickel hydroxide [Ni(H2O)x](OH)2, which has a particle size of less than 5–8 μm. Two reaction mechanisms are considered: consecutive and parallel consecutive. Theoretical modeling of the kinetic data allows the rate constants of individual reaction steps, along with the apparent activation energy, to be determined for different temperatures (20, 30, and 40°С).
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Dobrydnev, S.V., Alexandrova, O.A. & Rezvov, Y.G. Dissolution Kinetics of Nickel(II) Hydroxide in a Mixed Ammonia–Carbonate Solution. Theor Found Chem Eng 56, 362–366 (2022). https://doi.org/10.1134/S0040579522020063
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DOI: https://doi.org/10.1134/S0040579522020063