Question

theory you know. (5%) 7. Describe how to determine the second order rate constant k of the following reaction by an experiment. Describe as much detail as possible. For example, the tool and property used to follow the rate, the way to extract the rate constant.(5%) PhCH2CH2Br + Eto PhCH=CH2 + EtOH in EtOH 8. Suggest explanations for the following observations concerning equatorial nreferencec. (504

Answer 1

SECOND ORDER REACTION +Ftoh PHCH₂ CH₂ B8 & Elo- > Ph CH=CH ELOH This is of the form, A B - since A & B Products Main Reagent solvent (can be negleted) it is II order Reaction, assume may has only yout Products: Also initial time [A]. After some time [AH t-o tot Reaction - Decrease of concentration of A (CA] with respect of time - d[A] where А - ГРncң, ск, ву) sowel • Rate of d Rate of Reaction (speed) Rate FR & [A] - (Rate law) = K[A]7 (2- indicates) I order Rate Constate Equating ☺ & 2 CAM2 K[n] b0 Integrate Equation ③ & - d[A] = k dt

(* = =) (seni as . -co ----IKLU Jede = [2] =(-as] Upper - lower We ha = K (6-0). Sut [A] = [pher, CH₂ Bo] [ph CH, CH₂ By [ph Cha Che Bo] p t where k - Rate constant of given egen t - time after install time [ph Chach, Br] - Concentration after time t o [ph Cr, CH, By]. - initial concentration i eat on from Egn 4 give time & Concentrations, 'K' can be Calculated