From Chemistry Towards Technology Step-By-Step From Chemistry Towards Technology Step-By-Step От химии к технологии шаг за шагом 2782-1900 104793 10.52957/2782-1900-2025-6-3-127-133 Научные статьи Scientific articles Научные статьи Kinetics and stoichiometric mechanism of the reaction of nickel chloride with sodium dithionite Kinetics and stoichiometric mechanism of the reaction of nickel chloride with sodium dithionite Поленов Юрий Владимирович Polenov Yuriy Vladimirovich polyurij@yandex.ru Егорова Елена Владимировна Egorova Elena Vladimirovna egorova306@yandex.ru

кандидат химических наук;

candidate of chemical sciences;

 Ивановский государственный химико-технологический университет Ivanovo State University of Chemistry and Technology 30 09 2025 30 09 2025 6 3 127 133 27 08 2025 18 09 2025 https://chemintech.ru/en/nauka/article/104793/view

The paper investigates the kinetics of the reaction of nickel chloride with sodium dithionite in an aqueous solution, proceeding with the formation of metallic nickel via the reduction of nickel cations. As a result, parallel to the main process stage, reactions of sodium dithionite decomposition occur, yielding sulfite, thiosulfate, and sulfide as final products. Based on the analysis of experimental data and literature, a stoichiometric mechanism of the process has been proposed. Using mathematical modelling, the inverse kinetic problem of determining the rate constants of individual process stages has been solved. According to the comparison of experimental and calculated kinetic dependencies, the proposed mathematical model correlates with the experimental data.

The paper investigates the kinetics of the reaction of nickel chloride with sodium dithionite in an aqueous solution, proceeding with the formation of metallic nickel via the reduction of nickel cations. As a result, parallel to the main process stage, reactions of sodium dithionite decomposition occur, yielding sulfite, thiosulfate, and sulfide as final products. Based on the analysis of experimental data and literature, a stoichiometric mechanism of the process has been proposed. Using mathematical modelling, the inverse kinetic problem of determining the rate constants of individual process stages has been solved. According to the comparison of experimental and calculated kinetic dependencies, the proposed mathematical model correlates with the experimental data.

 mechanism of the chemical reaction kinetics modelling rate constant dithionite nickel mechanism of the chemical reaction kinetics modelling rate constant dithionite nickel

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