QuestionAugust 5, 2025

Write a balanced half-reaction for the reduction of aqueous hydrogen peroxide (H_(2)O_(2)) to liquid water (H_(2)O) in acidic aqueous solution.Be sure to add physical state symbols where appropriate. square

Write a balanced half-reaction for the reduction of aqueous hydrogen peroxide (H_(2)O_(2)) to liquid water (H_(2)O) in acidic aqueous solution.Be sure to add physical state symbols where appropriate. square
Write a balanced half-reaction for the reduction of aqueous hydrogen peroxide (H_(2)O_(2)) to liquid water (H_(2)O) in acidic aqueous solution.Be sure to add physical state symbols where appropriate. square

Solution
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Answer

H_2O_2(aq) + 2H^+(aq) + 2e^- \rightarrow 2H_2O(l) Explanation 1. Identify the reduction process Hydrogen peroxide (H_2O_2) is reduced to water (H_2O). 2. Write the unbalanced half-reaction H_2O_2(aq) \rightarrow H_2O(l) 3. Balance oxygen atoms Add one water molecule to the right side: H_2O_2(aq) \rightarrow 2H_2O(l) 4. Balance hydrogen atoms Add two protons to the left side: H_2O_2(aq) + 2H^+(aq) \rightarrow 2H_2O(l) 5. Balance charge with electrons Add two electrons to the left side: H_2O_2(aq) + 2H^+(aq) + 2e^- \rightarrow 2H_2O(l)

Explanation

1. Identify the reduction process<br /> Hydrogen peroxide $(H_2O_2)$ is reduced to water $(H_2O)$.<br />2. Write the unbalanced half-reaction<br /> $H_2O_2(aq) \rightarrow H_2O(l)$<br />3. Balance oxygen atoms<br /> Add one water molecule to the right side: $H_2O_2(aq) \rightarrow 2H_2O(l)$<br />4. Balance hydrogen atoms<br /> Add two protons to the left side: $H_2O_2(aq) + 2H^+(aq) \rightarrow 2H_2O(l)$<br />5. Balance charge with electrons<br /> Add two electrons to the left side: $H_2O_2(aq) + 2H^+(aq) + 2e^- \rightarrow 2H_2O(l)$
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