Question

please help

Consider the following reaction. 4A+B+40 + 4D +E ents (C) The following data was collected on the reaction. Trial [A], [B]. Rate (M/s) 0.32 0.62 0.32 6.861 0.64 0.62 0.32 27.444 3 1.24 0.32 13.722 0.32 0.62 0.64 6.861 Rate law 0.32 Knowing the rate which of the two mechanisms are proposed would be accurate: Mechanism 1 Mechanism 2 1 AB D+Y D-Y 12 Y+C Y+B+C X +A+C 3 X+A+C + D+Z+2C A 2+A E Which mechanism best fits the data? Select an answer B Which is most likely the rate-determining step? Select an ar

Answer 1

Using (iii) = (i), we get" 22444 = $6.64* 6.(0.76162 6.861 *(0.32)* (602) (6/32) ? 2.4 = o) = (2)* = (2)* = 17=2] 0.32 32) using (iv) +- (ii), we get 13.722 = *(0,33€ (127)" (10-306 24, Y . H 361 Kopije (10162](0.3214 = 2 = level >> (2)' = (2,04 => [y= 1 Thus, rate how can be given by a Rate law. = k [A]”[B]”[C]° 493 AW

o То ск To check which mechanism best fit, we will have to determine A order of reaction ( robe low) in both cases: Mechanism ] 2 A+B ) + y NIVITI 2. ye ki, x 3) Xtate kyo +2:+20 4) ztA kq, É Rate law is given by sale determing step .: + 4 = kq [2] [A] -0 z = intermediate using steady stale approximation for 2 d[z] =0 + – k3 [X] [A] [C] - Kq [2] [m] =0 - 12) = K I CA3<53 - K4 [A] :: using s.sa forx .at > kely) [C] - ka [x] (A )=0

3 [x] = kz [4] [3] k[A] LJ => [x] = ka{\] - © [A] Equation becomes [2] = lsm shihty? x K5 LC] => [2) = kako [Y] [c] . [^] using s.s.a for y + 4y=0 S cit U ki [A][B] - Kafy ] [c] = 0 » [Y= ki [A] [B] k2[C] Thus, equation ® becomes ks. kan kika] [B] JB x les [2] = ) [2] = 'Kok, [B] -

putting the value of [2] in equation & GE des - kiilaiky. [A] [B] Not matched with det rake law det ermined in question 1 Thus, it is not correct mechanism. Mechanism 2 :- @ B+C kry ory Y+B+C x +D ② xtate ke rate law, (E3 = ks IX] [][C] using sisa for a + d(x) = 0 -O at – ką LY][B][C] - kg [X3 [A] [C] =0 LATIT = [x] = ka[Y] [B][C) k₃ [A] -2 » [x] = k, 3 83 K3 CA] using ss. a for y + 4212 0 a ky A3 [c] - K2[4][B][C] =0

> [Y] = H, Costc. kross > LY) = the Equation @ becomes [X] = you CBD Bin] 9 [*] = kain [B] Thus, equation o - d[E] - kgxkix [B]. X [A] [c dt ks AS 5 set = k, [B][C]
last page is page no 1 and then all pages are arranged in subsequent order. I am huge sorry to say that I did six pages calculation and I found that none of mechanism is satisfying the given data. Procedure is absolutely right. So kindly request you to please check once by yourself. Thanks!
o The reaction is 4A+ 3+ 46 - 40+E The rate law of the above recution is "Rate = k [A]* [B]• [C]? - Ú Here, x,y ez are constant which is determined experimentally: The value of x, y and Ž can be determined from the provided data: Trial 1: Rate = k (ATÝLBİ L3 → 6861 = k (0-32), (0.6230 (0-32) ? ) Tsual 2 : 27-444 = K (0.64)*(0.02.) (0:327 tis : 3 لمهن WHERMITTIT 13.722 = k (0-32" (124) (0:322 tiü Tscial 4 : 6.841 –+(0:32) (0-20(0647- using . (ii), we get 6.861 K(0.375€ (0.62% (0.6472 6-861K(0,52) 2 (0.625% (0.5212