Balance the following by ion electron method is basic medium.
`NO_(3)^(ө)+Znrarr Zn^(2+)+NH_(4)^(oplus)`.

Explanation

To balance the given redox reaction \( \text{NO}_3^- + \text{Zn} \rightarrow \text{Zn}^{2+} + \text{NH}_4^+ \) using the ion-electron method in basic medium, we will follow these steps:

### Step 1: Identify the oxidation and reduction half-reactions
- **Oxidation half-reaction**: Zinc is oxidized from Zn to Zn²⁺.
- **Reduction half-reaction**: Nitrate (\( \text{NO}_3^- \)) is reduced to ammonium (\( \text{NH}_4^+ \)).

### Step 2: Write the oxidation half-reaction
The oxidation half-reaction can be written as:
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