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).

中文翻译：

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氢氧化镍 (II) 在混合氨碳酸盐溶液中的溶解动力学

摘要

在 20–40°C 的温度范围内研究了氢氧化镍 (II) 和混合氨-碳酸盐溶液形成镍 (II) 水-氨络合物的反应。实验表明，溶解是通过形成粒径小于 5-8 μm的水合氢氧化镍 [Ni(H ₂ O) _x ](OH) ₂形式的中间体进行的。考虑了两种反应机制：连续和平行连续。动力学数据的理论建模允许确定不同温度（20、30 和 40°С）下各个反应步骤的速率常数以及表观活化能。