23-Kinetics-Initial RxOrders-Ans(1)

23-Kinetics-Initial RxOrders-Ans(1) - 3) a) Reaction orders...

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CHEMICAL KINETICS INITIAL RATES METHOD OF DETERMINING RATE ORDERS GCHEM II LAB CONCEPT PROBLEMS Exp # INITIAL [A] INITIAL [B] RxRate (M/sec) =============================================================== 1 0.01 0.20 5.4 x 10 -7 2 0.02 0.20 10.8 x 10 -7 3 0.20 0.0202 10.8 x 10 -7 4 0.20 0.0404 21.6 x 10 -7 RxRate #1 = 5.4 x 10 -7 = k [0.01] N [0.20] M RxRate #2 = 10.8 x 10 -7 = k [0.02] N [0.20] M 0.50 = [0.50] N log (0.50) = N x log (0.50) 0.693 = N x 0.693 N = 1 Similar Calculation: M = 1 Rate Law: RxRate = k [A] 1 [B] 1 1) a) Reaction orders for A, B, & C b) Rate constant (k) & units c) Rx rate w/ BOLD concentrations TRIALS [A] [B] [C] Rx Rate (M/sec) 1 0.070 0.50 0.20 1.54E-2 2 0.070 1.50 0.20 4.62E-2 3 0.140 1.50 0.20 4.62E-2 4 0.140 1.50 0.40 9.24E-2 A B C K (units) Rx Rate 0 1 1 0.15 1/M-sec 0.092 M/sec 2) a) Reaction orders for A, B, & C b) Rate constant (k) & units c) Rx rate w/ BOLD concentrations TRIALS [A] [B] [C] Rx Rate (M/sec) 1 0.24 0.16 0.080 2.08E-4 2 0.24 0.32 0.080 4.17E-4 3 0.48 0.32 0.160 3.33E-3 4 0.48 0.32 0.080 8.34E-4 A B C K (units) Rx Rate 1 1 2 0.85 1/M 3 – sec 4.2 x 10 – 4 M/sec 1
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Unformatted text preview: 3) a) Reaction orders for A, B, & C b) Rate constant (k) & units c) Rx rate w/ BOLD concentrations TRIALS [A] [B] [C] Rx Rate (M/sec) 1 0.24 0.16 0.080 8.54E-1 2 0.24 0.16 0.240 8.54E-1 3 0.72 0.16 0.080 7.69 4 0.72 0.48 0.080 2.31E+1 A B C K (units) Rx Rate 2 1 93 1/M 2 sec 7.7 M/sec 4) a) Reaction orders for A, B, & C b) Rate constant (k) & units c) Rx rate w/ BOLD concentrations TRIALS [A] [B] [C] Rx Rate (M/sec) 1 .025 .075 .050 5.982E-5 2 .025 .075 .150 1.79E-4 3 .075 .075 .050 5.38E-4 4 .075 .225 .050 1.61E-3 A B C K (units) Rx Rate 2 1 1 25/M 3 sec 5.4 x 10 -4 5) a) Reaction orders for A, B, & C b) Rate constant (k) & units c) Rx rate w/ BOLD concentrations TRIALS [A] [B] [C] Rx Rate (M/sec) 1 0.070 0.50 0.20 1.99E-4 2 0.070 1.00 0.20 1.99E-4 3 0.140 1.00 0.40 1.59E-3 4 0.140 1.00 0.20 3.99E-4 A B C K (units) Rx Rate 1 2 .071 1/M 2 sec 1.6 x 10 3 M/sec 2...
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This note was uploaded on 07/28/2011 for the course CHM 2046c taught by Professor Staff during the Summer '08 term at UNF.

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23-Kinetics-Initial RxOrders-Ans(1) - 3) a) Reaction orders...

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