QUESTION 6
The first-order decomposition of hydrogen peroxide occurs according to the equation
2 H2O2(aq) --> 2 H2O(l) + O2(g)
Using data from a concentration-time study of this reaction, which plot will produce a straight line?
[H2O2] versus time |
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[H2O2]2 versus time |
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1 / [H2O2] versus time |
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ln[H2O2] versus time |
integrated rate laws:
integrated rate law for 2nd order reaction:
1/[A]o = 1/[A] - k*t
so, for 2nd order reaction, 1/[A] vs t will be straight line
integrated rate law for 1st order reaction:
ln [A] = –kt + ln [A]o
So, for 1st order reaction, ln[A] vs t will be straight line
integrated rate law for zero order reaction:
[A] = [A]o – k*t
So, for zero order reaction, [A] vs t will be straight line
Since this is 1st order reaction,
ln[A] vs t will be straight line
Answer: ln[H2O2] vs time
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