Abstract—The activation energy of the electrical conductivity of ammonium hydroxide–tungstate ion solutions is determined in the NH4OH concentration ranges 0.01–6 and 0.01–0.2 mol/L (based on the metal). For all solutions, the activation energy decreases substantially with increasing temperature and decreases insignificantly with increasing tungsten content in a solution at a constant ammonium hydroxide concentration. An increase in the NH4OH concentration at a constant tungsten content in a solution is found to cause an increase in the activation energy. All calculated activation energies suggest that the charge transfer in the system under study is determined by diffusional restraints.
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Kuznetsova, O.G., Levin, A.M., Sevost’yanov, M.A. et al. Electrical Conductivity of Tungsten-Containing Ammonia Solutions and Calculation of Its Activation Energy. Russ. Metall. 2020, 1343–1348 (2020). https://doi.org/10.1134/S0036029520110099
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DOI: https://doi.org/10.1134/S0036029520110099