Complete and balance the following chemical equations :
(a) `Fe^(2+) + MnO_(4)^(-) + H^(+) to " " ` (b) `MnO_(4)^(-) + H_(2)O + I^(-) to `

Explanation

To complete and balance the given chemical equations, we will follow a systematic approach for each part.

### Part (a):
**Given Reaction:**
\[ \text{Fe}^{2+} + \text{MnO}_4^{-} + \text{H}^{+} \rightarrow ? \]

**Step 1: Identify the oxidation states.**
- Iron (Fe) changes from +2 to +3 (oxidation).
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