Balance the following reaction by ion electrons method ( acidic medium).
`As_(2)S_(3)-NO_(3)^(ө)rarrS+NO_(2)+AsO_(4)^(3-)`

Explanation

To balance the given redox reaction using the ion-electron method in acidic medium, we will follow these steps:

### Step 1: Write the unbalanced equation
The unbalanced reaction is:
\[ \text{As}_2\text{S}_3 + \text{NO}_3^- \rightarrow \text{S} + \text{NO}_2 + \text{AsO}_4^{3-} \]

### Step 2: Determine oxidation states
- For arsenic in \(\text{As}_2\text{S}_3\), the oxidation state is +3.
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