Question

Hydrogen peroxide, H2O2

(aq) decomposes to H2O (l) and O2

(g) in a
reaction that is first order in H2O2 and has a rate constant
k = 1.06  10–3 min–1
.

(i) How long will it take for 15% of a sample of H2O2

to decompose ?
(ii) How long will it take for 85% of the sample to decompose ?

Answer 1

Answer:

Answer:i) 2.55 hours of time require to decompose 15% of hydrogen peroxide sample.

ii)29.83 hours of time require to decompose 85% of hydrogen peroxide sample.

Explanation:

The integrated expression of first order reaction:

[/tex]

k = rate constant, [A] = concentration of sample at time t.

= initial concentration

i) time taken 15 % of a sample of  to decompose:

ii) time taken 85 % of a sample of  to decompose:

Explanation:

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