Which of the following represent the reduction potential of silver wir...
Reduction Potential of Silver Wire in AgNO3 Solution
Explanation
The reduction potential of a half-cell is a measure of the tendency of the half-cell to gain electrons and undergo reduction. In the case of a silver wire dipped into a 0.1 M AgNO3 solution, the half-cell reaction can be represented as:
Ag+ + e- ⇌ Ag
The standard reduction potential for this half-cell reaction is given by the symbol E°red, which is equal to 0.80 V at 25°C.
Possible Answers
1. E°red
2. (E°red 0.059)
3. (E°ox -0.059)
4. (E°red-0.059)
Analysis
1. E°red: This is a possible answer as it represents the standard reduction potential of the half-cell reaction, which is 0.80 V at 25°C.
2. (E°red 0.059): This answer is incorrect as adding 0.059 V to the standard reduction potential would give the standard cell potential, not the reduction potential.
3. (E°ox -0.059): This answer is incorrect as it represents the standard oxidation potential, not the reduction potential.
4. (E°red-0.059): This answer is possible as subtracting 0.059 V from the standard reduction potential would give the reduction potential under non-standard conditions.
Conclusion
The correct answer for the reduction potential of silver wire dipped into a 0.1 M AgNO3 solution at 25°C is E°red, which is 0.80 V. However, (E°red-0.059) is also a possible answer as it represents the reduction potential under non-standard conditions.