Question 3 3.1. The reaction A + B takes place in a liquid-phase batch reactor at a constant temperature. The initial concentration of A is 1.3 mol/L. Determine the time required to achieve 75 % of the maximum possible conversion if the forward reaction is second order and the reverse reaction is first order: k, = 0.6 and kz = 0.3 min-1 Hint: ra = -k Ch+ k2CB CA = CA - x = 1.3 - x CB = CBo + x = 0 + x = x mol.min 2 For maximum conversion CA TA= = 0 dt A = -0.4(1.3 - x)2 + 0.3x = 0 Determine: i. The roots of the equation using fzero near 2 (5) ii. The real zero