Complete the following chemical equations :
(i) `MnO_(4)^(-) (aq) + S_(2)O_(3)^(2-) (aq) + H_(2) O(l) to1`
(ii) `Cr_(2)O_(7)^(2-) (aq) + Fe^(2+)(aq) + H^(+) (aq) to`

Explanation

To complete the chemical equations provided, we will follow the steps of balancing the redox reactions for both cases.

### (i) Completing the equation:
**Given Reaction:**
\[ \text{MnO}_4^{-} (aq) + \text{S}_2\text{O}_3^{2-} (aq) + \text{H}_2\text{O} (l) \rightarrow \]

**Step 1: Identify the oxidation states.**
- In \( \text{MnO}_4^{-} \), manganese (Mn) has an oxidation state of +7.
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