The conversion of ferrous ions to ferric ions by dissolved oxygen in the presence of bacteria is a rate of oxidation of 0.6 mol l1 ferrous ions is 0.25 mol l1 min1. 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 of0.6 mol l-1 in first order reaction with respect to ferrous ions in the concentration range of0.1-0.6 mol l. the a plug flow (tubular) reactor. volume of a mixed flow reactor (cstr) that would be required for 70% conversion of 0.6 mol l (c) ferrous ion feed stream of 8 kmol h (d) a second reactor of same volume was used in series with the reactor in part (c). calculate the percentage of unreacted ferrous ions in the exit stream of the second reactor.