Reduction-Oxidation Titration

Reduction-oxidation Titration Audrey Chojko-Bolec Matt Brown 02.17.12 Tuesday AM, Group A6 Purpose Use oxidoreduction titration with super C permanganate (KMnO4) reply to analyze an undiscovered Iron II (Fe2+) upshot. Theory Redox titration is a type of titration based on a oxidoreduction dish out between the analyte and titrant in the answer (Burk et al. 2011). In lay to footfall the iron content of an unknown iron sample, redox titration hobo be performed with Fe(II) solution and patternized potassium permanganate solution. In this outcome the analyte of the reaction is Fe(II) and the titrant is (KMnO4). In order for redox titration to proceed; no side reaction dope occur, if the solution is non totally acidic then neutral solutions would cause it to arrive MnO2 (Burk et al. 2011). A satisfactory indicator needs to be met to imply the revoke bit (Burk et al. 2011). It also needs to have a richly rate of reaction such that when end point is rea ched it is unornamented so no extra titrant is added to the mixture (Burk et al. 2011). At last, the reaction mustiness be thermodynamically spontaneous nice in order for the stoichiometric calculations to be used validly (Burk et al. 2011). KMnO4 cannot be used as a first measurement; this is because it is not stable in the presence of air. It oxidizes sporadically to MnO2.

For this reason, the primary standard used is sodium oxalate, Na2C2O4. The standardization of of KMnO4 solution with Na2C2O4 is as follows: Oxidation: Na2C2O4?2Na++2CO2+2e- Reduction: KMnO4+8H++5e-?K++Mn+2+4H2O And the general equilibrize equation: 16H++5Na2 C2O4+ 2KMnO4?10Na++2CO2 These reactions a! re thermodynamically spontaneous, but the terminal cardinal is susceptible to a side reaction and it is course rattling kinetically slow (Blandamer et al. 1998). The MnO2 present in the reaction in KMnO4 must be filtered to remove it because it interferes with the standardization. After KMnO4 has been standardized, Fe (II) can be titrated with KMnO4. Two of the side...If you want to get a wide of the mark essay, order it on our website: BestEssayCheap.com

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