At 298 K, the standard reduction potential for electrode is 0.34 V. Given , . The reduction potential at for the above couple is . The value of x is .

Question

At 298 K, the standard reduction potential for  electrode is 0.34 V. Given , . The reduction potential at  for the above couple is . The value of x is .

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Strategy:
 Determine the concentration of  ions from the  and the given pH, then apply the Nernst Equation to find the electrode potential.

Step 1: Find  and 
.

.

Step 2: Apply Nernst Equation
Reaction: , , .

Result:
.

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