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The single electrode potential E(M^(+)//...

The single electrode potential `E_(M^(+)//M)` of `0.1 `M solution of `M^(+)` ions for the half cell `M^(+)+e^(-)rarr M(s)` with `E^(o)=-2.36V`is :

A

`+ 2.41 V`

B

`-2.41 V`

C

`-4.82V`

D

`+4.82 V`

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The correct Answer is:
To find the single electrode potential \( E_{M^{+}//M} \) for a 0.1 M solution of \( M^{+} \) ions, we will use the Nernst equation: \[ E = E^{\circ} - \frac{0.0591}{n} \log \left( \frac{1}{[M^{+}]} \right) \] ### Step-by-Step Solution: 1. **Identify the given values:** - Standard electrode potential \( E^{\circ} = -2.36 \, V \) - Concentration of \( M^{+} \) ions = 0.1 M - Number of electrons transferred \( n = 1 \) 2. **Write the Nernst equation:** \[ E = E^{\circ} - \frac{0.0591}{n} \log \left( \frac{1}{[M^{+}]} \right) \] 3. **Substitute the known values into the Nernst equation:** \[ E = -2.36 - \frac{0.0591}{1} \log \left( \frac{1}{0.1} \right) \] 4. **Calculate the logarithm:** \[ \log \left( \frac{1}{0.1} \right) = \log(10) = 1 \] 5. **Substitute the logarithm value back into the equation:** \[ E = -2.36 - 0.0591 \times 1 \] 6. **Perform the multiplication:** \[ 0.0591 \times 1 = 0.0591 \] 7. **Final calculation:** \[ E = -2.36 - 0.0591 = -2.4191 \, V \] 8. **Round the answer to two decimal places:** \[ E \approx -2.42 \, V \] ### Final Answer: The single electrode potential \( E_{M^{+}//M} \) for the 0.1 M solution of \( M^{+} \) ions is approximately \( -2.42 \, V \).
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