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Given: OxidationH(2)O(2) rarr O(2)+2H^...

Given`:`
Oxidation`H_(2)O_(2) rarr O_(2)+2H^(o+)+2e^(-)" "E^(c-)=-0.69V,`
`2F^(c-)rarr F_(2)+2e^(-)" "E^(c-)=-287V,`
Reduction `: H_(2)O_(2)+2H^(o+)+2e^(-) rarr 2H_(2)O" "E^(c-)=1.77V,`
2I^(c-)rarr I_(2)+2e^(-)" "E^(c-)=-0.54V,`
Which of the following statements is `//` are correct ?

A

`H_(2)O_(2)` behaves as an oxidant for `I_(2)//I^(c-)`

B

`H_(2)O_(2)` behaves as an reductant for `I_(2)//I^(c-)`

C

`I^(c-)//I_(2)` behaves as an reductant for `H_(2)O_(2)`

D

None of these is correct

Text Solution

AI Generated Solution

The correct Answer is:
To solve the given electrochemistry problem, we need to analyze the provided half-reactions and their standard electrode potentials (E°). We will determine which reactions are spontaneous and which statements regarding these reactions are correct. ### Step-by-Step Solution: 1. **Identify the Half-Reactions and Their Potentials:** - Oxidation: \[ H_2O_2 \rightarrow O_2 + 2H^+ + 2e^- \quad E^\circ = -0.69 \, V \] - Reduction (for H2O2): \[ H_2O_2 + 2H^+ + 2e^- \rightarrow 2H_2O \quad E^\circ = 1.77 \, V \] - Oxidation of Fluorine: \[ 2F^- \rightarrow F_2 + 2e^- \quad E^\circ = -287 \, V \] - Reduction of Iodine: \[ 2I^- \rightarrow I_2 + 2e^- \quad E^\circ = -0.54 \, V \] 2. **Determine the Spontaneity of Each Reaction:** - A reaction is spontaneous if the overall cell potential (E°cell) is positive. - For the oxidation of \(H_2O_2\), the potential is negative, indicating it is not spontaneous. - For the reduction of \(H_2O_2\), the potential is positive, indicating it is spontaneous. - The oxidation of \(F^-\) is highly negative, indicating it is not spontaneous. - The reduction of \(I^-\) is also negative, indicating it is not spontaneous. 3. **Calculate the Overall Cell Potentials:** - For the reaction involving \(H_2O_2\): \[ E^\circ_{cell} = E^\circ_{reduction} - E^\circ_{oxidation} = 1.77 \, V - (-0.69 \, V) = 1.77 \, V + 0.69 \, V = 2.46 \, V \] - This indicates that the reaction involving \(H_2O_2\) is spontaneous. 4. **Evaluate the Other Reactions:** - For fluorine and iodine, since both reactions have negative potentials, they do not contribute to a spontaneous reaction. 5. **Conclusion:** - The only spontaneous reaction is the reduction of \(H_2O_2\) to \(H_2O\). - Therefore, any statement claiming that the oxidation of \(H_2O_2\) or the oxidation of \(F^-\) is correct would be false. ### Final Answer: The correct statement is that the reduction of \(H_2O_2\) is spontaneous, while the oxidation of \(H_2O_2\) and \(F^-\) is not spontaneous.

To solve the given electrochemistry problem, we need to analyze the provided half-reactions and their standard electrode potentials (E°). We will determine which reactions are spontaneous and which statements regarding these reactions are correct. ### Step-by-Step Solution: 1. **Identify the Half-Reactions and Their Potentials:** - Oxidation: \[ H_2O_2 \rightarrow O_2 + 2H^+ + 2e^- \quad E^\circ = -0.69 \, V ...
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