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relative rate = k [I - ] [BrO 3 - ] [H + ] 2 1) For the following rates, find th

ID: 485833 • Letter: R

Question

relative rate = k [I-] [BrO3-] [H+]2

1) For the following rates, find the value of k.

a) rate = 11.11 Concentration of [I-]0.002. Concentration of [BrO3-]is 0.008. Concentration of [H+]is 0.02.

b) rate = 23.81 Concentration of [I-]0.004. Concentration of [BrO3-]is 0.008. Concentration of [H+]is 0.02.

c) rate = 22.22 Concentration of [I-]0.002. Concentration of [BrO3-]is 0.016. Concentration of [H+]is 0.02

d) rate = 47.62 Concentration of [I-] 0.002.Concentration of [BrO3-] is 0.008. Concentration of [H+]is 0.04

2) Calculate k mean and find the standard deviation

3) Why should k have nearly the same value for each of the reactions above

Explanation / Answer

1)

a)

rate = k [I-] [BrO3-] [H+]2

11.11 = k [0.002][0.008][0.02]^2

k = 1.74 x 10^9

b)

rate = k [I-] [BrO3-] [H+]2

23.81= k [0.004][0.008][0.02]^2

k = 1.86 x 10^9

c)

similarly substitute the values in rate equation. we get

k = 1.74 x 10^9

d)

k = 1.86 x 10^9