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Kinetics of Reductive Dissolution of Manganese Dioxide in Aqueous Formic Acid at 298 K

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It is reported the kinetics of as-prepared colloidal manganese dioxide dissolution in aqueous formic acid at 298 K. The rate of dissolution increased with increasing formic acid concentration. As the formic acid concentration was increased from 0.222 to 1.11 mol┬Ědm–3, the dissolution rate of MnO2 to Mn(II) species increased. Upon the addition of more formic acid, the complete dissolution of MnO2 occurred more quickly. The as investigated reaction has fractional order (0.51) dependence in formic acid concentration. The order was also fractional order (1.42) with respect to MnO2 concentration. The reaction product was Mn(II) species.
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Keywords: AVERAGE OXIDATION STATE; COLLOID; FORMIC ACID; KINETIC; MANGANESE DIOXIDE

Document Type: Research Article

Publication date: 01 September 2014

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  • Journal of Colloid Science and Biotechnology is an international multidisciplinary peer- reviewed journal covering all aspects of colloid science including colloids preparation, characterization, structure-property relationships, spectroscopy, chemical and physical properties and applications of colloids in biotechnology, medicine and pharmaceuticals. This journal deals with interdisciplinary research areas of chemistry, physics, biology, materials science, polymer science, nanotechnology covering all topics related to colloids such as latexes, emulsions, suspensions, micellar systems, gels, composites, hybrids, surfactants, aerosols, foams, minerals, soft matter, microfluidics, encapsulation processes of active molecules, biomolecules, surfacial and interfacial processes, catalysis, electrochemistry, theoretical aspects, computer simulations and colloids in biotechnology and medicine.
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