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E-Journal of Chemistry
Volume 6, S1, Pages S225-S234

Comparative Study on the Stability of Mn(III) Ion Prepared by Different Methods in H2SO4 and H3PO4 Media

Balaprasad Ankamwar, Omprakash Yemul, and Shashikant Deshmukh

Department of Chemistry, Shivaji University, Kolhapur-416 004, India

Received 12 May 2009; Accepted 10 July 2009

Copyright © 2009 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The time-periods required for the % of Mn(III) to disappear from the solution and the half-life of Mn(III) was studied in 7 mol dm-3 H2SO4 and 7 mol dm-3 H3PO4 media at ambient conditions at three different Mn(III) concentrations viz. 4.98, 1.94 and 1.04 mmol dm-3 using spectrophotometric method. Half-life periods in the presence of 7 mol dm-3 H2SO4 are more than those in presence of 7 mol dm-3 H3PO4. The time-periods required for the 1% of Mn(III) to disappear that for H2SO4 medium from 1.94 mmol dm-3, Mn(III) solutions prepared from solid form is about 20 days, 10 days for electro-generated Mn(III) and 6 days for chemical oxidation method.