Assignment 2: A reaction, speeded up by one of its products, is called self-catalyzed. Classic example of self-catalysis is a reaction of acetone iodination in acid medium, described by total scheme: CH3COCH3 + 12 CH3COCHI + HI Reaction consists of two stages. On its first stage ketone transforms into enol (slowed stage): CH3COCH3 + H307 CH3COHCH3 + H29 Further enol reacts with iodide to form final products. As reaction passes, hydronium content increases, which speeds up the reaction. Thus, rate of the reaction is defined by rate of acetone enolization: dCA/dt = ACACHO* where C, is current concentration of acetone, kis a rate constant of rate-determining step. If initial concentrations of acetone and hydronium are marked as Cao and Ceo, then kinetic equations of self- catalyzed reaction could be written in the form: dx(1) k(CA - x(0) CB + x(i)) dr (x: the extent of the reaction = Cw-CA) Given: ; [CH,COCHs]o = 0.1M ; [la]o = 0.1M ; [H"), = 0.01 M ; k=0.1 (M+.hu) 1. Plot the Concentration of CH3COCH I as a function of time. 2. How long does it take to reduce 50% of CH COCH3