Write the half cell reaction and the overall cell reaction for the electrochemical cell :
`Zn | Zn^(2+) (1.0M) ||Pb^(2+) (1.0M) |Pb`
Calculate the standard e.m.f. for the cell if standard electrode potentials (reduction) for `Pb^(2+) | Pb` and `Zn^(2+) |Zn` electrode are -0.126 V and `-0.763` V respectively.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Write the half-cell reactions
1. **Anode Reaction (Oxidation)**: Zinc (Zn) is oxidized to zinc ions (Zn²⁺).
\[ \text{Zn} \rightarrow \text{Zn}^{2+} + 2e^- \]

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