Does PH Have an Effect on the Cell Potential (E_cell)for $\to$

question 167

Multiple Choice

Does pH have an effect on the cell potential (E_cell) for the following oxidation-reduction reaction? 5 Fe²⁺(aq) + MnO₄^-(aq) + 8 H⁺(aq) $\to$ 5 Fe³⁺(aq) + Mn²⁺(aq) + 4 H₂O( )

• A)Yes,because E_cell values for all redox reactions depend on the pH.
• B)Yes,because E_cell values for redox reactions involving hydrogen ions depend on the pH.
• C)No,because E_cell values for redox reactions depend only on the major species in the reaction,in this case,Fe²⁺,MnO₄^-,Fe³⁺,and Mn²⁺.
• D)No,because E_cell values for redox reactions depend on concentrations and temperatures but not on pH.
• E)No,because E_cell values for redox reactions do not depend on the pH.

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