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Analysis reveals insights into metal-cation speciation using mass-balance data from electrowinning experiments, implying educational value.
The appropriate interpretation of mass-balance data from undivided-cell electrowinning experiments allows for the determination of some simple aspects of metal-cation speciation within the electrolysis solution. The data that needs to be collected is limited to the ratio of the amount of acid produced to the amount of metal removed from the solution. By analysis of a simplified model of the electrowinning experiment, the ability to use such data to determine certain limits of metal-cation speciation is demonstrated. The overall treatment is useful in demonstrating to chemistry students that significant conclusions can be drawn from easily collected data when the system under consideration is well-understood.
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Gernon et al. (2002) studied this question.
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