Calculate the standard cell potential (in V) of the cell in which the following reaction takes place: . Given: , ,

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Strategy:
 Standard cell potential . Identify the half-reactions and their corresponding potentials.

Step 1: Identify Half-reactions
Overall Reaction: 
- Cathode (Reduction): , 
- Anode (Oxidation):

Step 2: Obtain 
We are given:
1. , , 
2. , , 
For :

Step 3: Calculate

Comparing with the simplified option (c), which assumes  as the direct reduction potential for the trivalent couple:

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