The decomposition of hydrogen peroxide in dilute sodium hydroxide at 20 °C H2O2

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wnl66

Science

Description

The decomposition of hydrogen peroxide in dilute sodium hydroxide at 20 °C


H2O2(aq)H2O(l) + ½ O2(g)

is first order in H2O2 with a rate constant of 1.10E-3 min-1.

If the initial concentration of H2O2 is 5.80E-2 M, the concentration of H2O2 will be 1.72E-2 M after min have passed.

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Explanation & Answer

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the concentration is reduced by  (5.80E-2-1.72E-2)=4.08E-2 M

Time is 4.08E-2/1.10E-3=37 min

The right answer is 37 min. 

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Anonymous
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