The decomposition of hydrogen peroxide is a first-order reaction: H2O2(aq) H2O(l) + 1 / 2 O2(g)
Question:
The decomposition of hydrogen peroxide is a first-order reaction:
H2O2(aq) → H2O(l) + 1 / 2 O2(g)
The half-life of the reaction is 17.0 minutes.
a. What is the rate constant of the reaction?
b. If you had a bottle of H2O2, how long would it take for 86.0% to decompose?
c. If you started the reaction with [H2O2] = 0.100 M, what would be the hydrogen peroxide concentration after 15.0 minutes?
Step by Step Answer:
a k ln2 t 12 0693 170 min 004076 00408 min b When 860 of the ...View the full answer
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Hydrogen peroxide can be used as a mild antiseptic to curb superficial skin infections such as athlete’s foot, but only in diluted quantities. To combat stinky feet, try soaking your feet in a solution of 1 part 3% hydrogen peroxide and 3 parts warm water for 15-20 minutes, then drying them thoroughly. This will kill odor-causing bacteria and soften your feet. To treat athlete\'s foot, you can use a similar solution, but only in diluted quantities, and soak your feet for 30 minutes. Hydrogen peroxide can also be used to keep vegetables fresh by adding 1/4 cup to a bowl of cold water, soaking the vegetables for 20-30 minutes, then draining, drying, and refrigerating them. Alternatively, you can spray vegetables with a solution of 3% hydrogen peroxide and let them stand for a few minutes before rinsing and drying. To keep leftover salad fresh, spray it with a solution of 1/2 cup water and 1 Tbsp. 3% hydrogen peroxide, drain, cover, and refrigerate.
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