Complete the chemical reactions :
(i) `MnO_4^(-) + SO_2 + H^(+) to`
(ii)` S_2O_3^(2-) + Cr_2O_7^(2-) + H^(+) to `

Explanation

To complete the chemical reactions provided, we need to follow the steps of balancing redox reactions in acidic medium. Let's break down each reaction step by step.

### Reaction (i): `MnO4^(-) + SO2 + H^(+)`

1. **Identify the oxidation states**:
- In `MnO4^(-)`, manganese (Mn) has an oxidation state of +7.
- In `SO2`, sulfur (S) has an oxidation state of +4.
- In `HSO4^(-)`, sulfur (S) has an oxidation state of +6.
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