Question

Initial rate data are listed in the table for the reaction:

NH₄⁺ (aq) + NO₂^- (aq) → N₂ (g) + H₂O (l)

1:26 Bb Bb # . * *] LTE 4 18% Iniliul rale cala are listed in the lable lor the reaction | N-4'(aq) + N^2 (ag - Nội - Học [l] Experiment (NH4+1 NO. 1 Intial rate (M/S) 0.21 0.10 1.2x1074 0.12 0.10 3.6 x 104 0.12 0.15 1.4 x 104 0.12 0.12 4.3 x 104 first determine the rate law and rate constant Under the same initial concitions as in Experiment 4, calculate INH2, at 184 seconds after the start of the react on. In this experiment both reactants are present at the same initial Curiconlraliun. The units should be Mandahould he calculated 10 three significant figures. 041 M This reaction is first order in both reactants. In Experiment. the inlial curicentraliurare t varni lor bol reuclarils. Siriccicy react in a one -one ratio this can be represented as a second order reaction of the type Tate = K[^)" The integrated rate law is: 1/(A= kl + 1:14] Submit Answer Incorrect. Ines 1/45 Preulous Irles Posl Discussion Send Feedbuck

First determine the rate law and rate constant.

Under the same initial conditions as in Experiment 4, calculate [NH₄⁺] at 184 seconds after the start of the reaction. In this experiment, both reactants are present at the same initial concentration.

The units should be M, and should be calculated to three significant figures.

Answer 1

let m' be the order with respoct to Netion & n' be the order with respect to Nogion N46, (20) + NOR (0) — Ng (g) + H2O(l) Rate Law is expressed as Rate = (NH2) (No m and cannot be determined from stoichiometry They can only be determined experimentally. from experiment 1 7.2 X10-4 - K.(0-24)" (0-10)" ---- from experiment 2 36 *10-49 K. (0.125" (0,10)" ---- 2- (0322) 22 m=1 from experiment 3 5:4X10-4 (0-12) (0.15) , we get ---- W n=1

. Rate Low Rall & KENING) (N05 & Second order! reaction If in this, we put the values of experment 1, 7.2 x 104 = K (0.24) Cono) 27 ke 7.2 x 10-4 0.24x0.10 Ko 300 × 10 -4 M18-1 As the reaction is a so oond order machon, the integrated fate cows for second order reaction is as followsi- I'm experiment 4 imibia (14")[), 2014) Time od 184 seconds Rate constant ako 300 x 104 Mist (300 x 70** *124) + 0.12

- 5.52 + 8.33 (A2 = 5.50 F 13.853 (4] - 0.072 (0) 184 seconds, 0.072 (M)