3 PART QUESTION 2A)Consider this balanced chemical equation: H2O2(aq)+3I-(aq)+2H
ID: 866247 • Letter: 3
Question
3 PART QUESTION
2A)Consider this balanced chemical equation:
H2O2(aq)+3I-(aq)+2H+(aq) ? I3-(aq)+2H2O(l)
In the first 10.0 seconds of the reaction, the concentration of I- drops from 1.000 M to 0.900 M. Determine the rate of change in the concentration of H+ during this time interval. Express your answer in M/s.
2B)Using Table I, determine the overall order of the reaction. Assume each experiment is carried out at the same temperature. Enter an integer.
2C)Using the table below, determine the rate constant, k. Assume each experiment is carried out at the same temperature. Express your answer in M-2s-1. Enter only a numerical value, do not enter units.
Experiment Initial [A] Initial [B] Initial Rate 1 1M 1M 2.0*10-2M/s 2 1M 2M 4.0*10-2M/s 3 2M 1M 8.0*10-2M/sExplanation / Answer
2A) H2O2(aq)+3I-(aq)+2H+(aq) ---> I3-(aq)+2H2O(l)
Rate = -dH2O2/dt = -dI-/3dt = -dH+/2dt
rate = -dH+/2dt = -(0.9-1)/3*10 = 0.0033
-dH+/dt = 0.0033*2 = 0.0066 M/sec
2B) order w.r.t A
r1/r2 = [a1/a2]^m
2.0*10^-2/4.0*10^-2 = (1/2)^m
m = 1
order w.r.t A = 1
order w.r.t B
2.0*10^-2/8.0*10^-2 = (1/2)^n
n = 2
order w.r.t B = 2
overall order = 2+1 = 3
2C) order w.r.t A
r1/r2 = [a1/a2]^m
2.0*10^-2/8.0*10^-2 = (1/2)^m
m = 2
order w.r.t A = 2
order w.r.t B
r1/r2 = [a1/a2]^n
2.0*10^-2/4.0*10^-2 = (1/2)^n
n = 1
order w.r.t B = 1
over all order = 2+1 = 3
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