The OH· radical disproportionates according to the elementary chemical reaction This reaction is second order in OH·. ?

The rate constant for the reaction is 2.0 × 10 –12 cm 3/molecules at room temperature. If the initial OH concentration is 1.7 × 10 13 molecules/cm 3, what is the first half-life for the reaction?

a. 

3.5 × 1011 s

 b. 

5.9 × 10–14 s

 c. 

3.4 × 101 s

 d. 

2.9 × 10–2 s

 e. 

1.5 × 10–2 s

1 Answer

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  • 2 months ago

    For a 2nd order reaction, the half-life is given as:

    t1/2=1/k[A]0

    t1/2 = 1/(2.0X10^-12)(1.7X10^13) = 2.9X10^-2 s

    d. 2.9 × 10–2 s

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