When measured against a standard calomel electrode, an electrode is found to have a standard reduction potential of 0.100 V. if standard reduction potential of calomel electrode is +0.244 V and it acts as anode, the standard electrode potential of the same electrode against standard hydrogen electrode will be

Options

A. `-0.144V`
B. `+0.100V`
C. `-0.344V`
D. `-0.100V`

Explanation

To find the standard electrode potential of the given electrode against the standard hydrogen electrode (SHE), we can use the following steps:

### Step 1: Understand the given values
- The standard reduction potential of the electrode (E₁) against the standard calomel electrode (SCE) is given as 0.100 V.
- The standard reduction potential of the calomel electrode (E₂) is +0.244 V.
- The calomel electrode acts as the anode in this case.

### Step 2: Determine the standard electrode potential of the given electrode against SHE
Since the calomel electrode is acting as the anode, we can use the following relationship to find the standard electrode potential of the given electrode (E₃) against the standard hydrogen electrode (SHE):

\[ E₃ = E₂ - E₁ \]

Where:
- E₃ = Standard electrode potential of the given electrode against SHE
- E₂ = Standard reduction potential of the calomel electrode
- E₁ = Standard reduction potential of the given electrode against the calomel electrode

### Step 3: Substitute the values
Now, substituting the values into the equation:

\[ E₃ = 0.244 \, \text{V} - 0.100 \, \text{V} \]

### Step 4: Calculate E₃
Now, perform the calculation:

\[ E₃ = 0.244 \, \text{V} - 0.100 \, \text{V} = 0.144 \, \text{V} \]

### Step 5: Conclusion
Thus, the standard electrode potential of the given electrode against the standard hydrogen electrode is:

**E₃ = 0.144 V**