Map General Chemistry 4th Edition University Science Books presented by Sapling

Question

Map General Chemistry 4th Edition University Science Books presented by Sapling Learning Consider this initial-rate data at a certain temperature for the reaction described by OH-(aq) oci(a)1 (aq) Trial Determine the rate law and the value of the rate constant for this reaction. |[OClo (M)|[I-lo (M) |[OH-lo (M)IRA I rates 0.00173 0.00173 0.00279 0.00173 0.00173 0.00304 0.00173 0.00304 0.725 0.490 0.490 0.617 (M/s) 0.000415 0.000729 0.000531 0.000493 rate k ocr] OH] Number Units Tools x 102 Previous Give Up & View Solution O Check Answer @ Next Exit Hint

Explanation / Answer

Let OCl- = A

I- = B

OH- = C

Rate law r = k [A]m [B]n [C]p

From trial 1 and 2

r1/r2 = [A1]m [B1]n [C1]p/ [A2]m [B2]n [C2]p

(0.000415 / 0.000729) = (0.00173/0.00304)n

0.569 = 0.569n

n = 1

From trial 2 and 4

r2/r4 =  [A2]m [B2]n [C2]p/ [A4]m [B4]n [C4]p

(0.000729/ 0.000493) = (0.490/0.725)p

1.478 = 0.675p

ln (1.478) = p ln 0.675

p = - 1

From trial 1 and 3

r1/r3 =  [A1]m [B1]n [C1]p/ [A3]m [B3]n [C3]p

0.000415/0.000531 = 0.00173m *0.490-1/0.00279m x 0.617-1

0.7815 = 1.259 x (0.62)m

0.62 = 0.62m

m = 1

Rate law r = k [A]m [B]n [C]p

Rate = k [OCl-][I-] / [OH-]

From trial 1

0.000415 = k * 0.00173*0.00173/0.490

k = 67.944 s-1

k = 0.679 x 10^2 s-1

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