At what pH, given half cell will have electrode potential of 1.282 V? (Nearest Integer)

Given: ,

Question

At what pH, given half cell  will have electrode potential of 1.282 V? (Nearest Integer)

Given: ,

Canvas Classes · Accepted Answer

Strategy:
 Use the Nernst Equation for the permanganate reduction half-cell. The potential is highly sensitive to pH due to the requirement of  ions per permanganate ion.

Step 1: Write the Nernst Equation
Half-reaction:

Step 2: Substitute known values
, , , .

Step 3: Solve for pH

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