A metal anode has a standard reduction potential of minus 1.56 V and the cathode has a reduction potential of minus 1.16 V. What is the E°cell?

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### Understanding Standard Reduction Potentials

A metal anode has a standard reduction potential of -1.56 V, while the cathode has a reduction potential of -1.16 V. What is the \( E^0_{\text{cell}} \)?

- ○ -0.40 V
- ○ +0.40 V
- ○ -2.72 V
- ○ +2.72 V

#### Explanation

To find the standard cell potential \( E^0_{\text{cell}} \), use the formula:

\[ E^0_{\text{cell}} = E^0_{\text{cathode}} - E^0_{\text{anode}} \]

Given:
- \( E^0_{\text{cathode}} = -1.16 \, \text{V} \)
- \( E^0_{\text{anode}} = -1.56 \, \text{V} \)

\[ E^0_{\text{cell}} = (-1.16 \, \text{V}) - (-1.56 \, \text{V}) = 0.40 \, \text{V} \]

Thus, the correct answer is:
- ○ +0.40 V
Transcribed Image Text:### Understanding Standard Reduction Potentials A metal anode has a standard reduction potential of -1.56 V, while the cathode has a reduction potential of -1.16 V. What is the \( E^0_{\text{cell}} \)? - ○ -0.40 V - ○ +0.40 V - ○ -2.72 V - ○ +2.72 V #### Explanation To find the standard cell potential \( E^0_{\text{cell}} \), use the formula: \[ E^0_{\text{cell}} = E^0_{\text{cathode}} - E^0_{\text{anode}} \] Given: - \( E^0_{\text{cathode}} = -1.16 \, \text{V} \) - \( E^0_{\text{anode}} = -1.56 \, \text{V} \) \[ E^0_{\text{cell}} = (-1.16 \, \text{V}) - (-1.56 \, \text{V}) = 0.40 \, \text{V} \] Thus, the correct answer is: - ○ +0.40 V
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