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The conversion of ferrous ions to ferric ions by dissolved oxygen in the presence of bacteria...

The conversion of ferrous ions to ferric ions by dissolved oxygen in the presence of bacteria is a first order reaction with respect to ferrous ions in the concentration range of 0.1 – 0.6 mol L-1 . The rate of oxidation of 0.6 mol L-1 ferrous ions is 0.25 mol L-1 min-1 . Calculate the following: (a) First order rate constant for the oxidation reaction. (b) Time taken for 70% conversion of ferrous ions at an initial concentration of 0.6 mol L -1 in a plug flow (tubular) reactor. (c) Volume of a mixed flow reactor (CSTR) that would be required for 70% conversion of 0.6 mol L-1 ferrous ion feed stream of 8 kmol h-1 . (a) A second reactor of same volume was used in series with the reactor in part (b). Calculate the percentage of unreacted ferrous ions in the exit stream of the second reactor.

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