The standard cell potential for the galvanic cell based on the reaction below is                              V.

Zn(s)  +  Sn4+(aq)  →  Sn2+(aq)  +  Zn2+(aq)

﻿﻿﻿

Half-reaction

E° / V

Sn4+(aq)  +  2e-  →  Sn2+(aq)

0.15

Zn2+(aq)  +  2e-  →  Zn(s)

-0.76




-0.91
0.91
1.45
0.61
-0.61


To calculate the standard cell potential \( E^\circ_{\text{cell}} \) for a galvanic cell, we use the formula:

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

### Step 1: Identify the half-reactions.

Given the overall cell reaction:

\[
\text{Zn(s)} + \text{Sn}^{4+}(aq) \rightarrow \text{Sn}^{2+}(aq) + \text{Zn}^{2+}(aq)
\]

- The oxidation half-reaction (anode):  
\[
\text{Zn(s)} \rightarrow \text{Zn}^{2+}(aq) + 2e^-
\]  
\( E^\circ_{\text{anode}} = -0.76 \, V \)

- The reduction half-reaction (cathode):  
\[
\text{Sn}^{4+}(aq) + 2e^- \rightarrow \text{Sn}^{2+}(aq)
\]  
\( E^\circ_{\text{cathode}} = 0.15 \, V \)

### Step 2: Apply the formula.

\[
E^\circ_{\text{cell}} = E^\circ_{\text{cathode}} - E^\circ_{\text{anode}} 
= 0.15 - (-0.76)
\]
\[
E^\circ_{\text{cell}} = 0.15 + 0.76 = 0.91 \, V
\]

### Final Answer:
The standard cell potential for the galvanic cell is **0.91 V**.

Would you like more details or have any questions?

### 5 Related Questions:
1. How does the sign of cell potential relate to the spontaneity of the reaction?
2. What is the significance of standard reduction potentials in a galvanic cell?
3. How can the Nernst equation modify cell potential for non-standard conditions?
4. What role do electrons play in oxidation and reduction half-reactions?
5. How do we determine which electrode acts as the anode or cathode?

### Tip:
In a galvanic cell, the electrode where reduction occurs is always the cathode, and the electrode where oxidation occurs is the anode.

The standard cell potential for the galvanic cell based on the reaction below is V. Zn(s) + Sn4+(aq) → Sn2+(aq) + Zn2+(aq) Half-reaction E° / V Sn4+(aq) + 2e- → Sn2+(aq) 0.15 Zn2+(aq) + 2e- → Zn(s) -0.76

Learn how to calculate the standard cell potential for a galvanic cell using zinc and tin half-reactions. This guide provides a step-by-step solution using the formula E°cell = E°cathode - E°anode. Suitable for students in advanced chemistry, Grades 11-12.

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