Complete the following reactions :
(i) `Cr_(2)O_(7)^(2-)+Sn^(2+)+H^(+) to `
(ii) `MnO_(4)^(-)+Fe^(2+)+H^(+) to `

Explanation

To complete the given reactions, we will analyze each reaction step by step.

### Reaction (i):
**Given Reaction:**
\[ \text{Cr}_2\text{O}_7^{2-} + \text{Sn}^{2+} + \text{H}^+ \rightarrow ? \]

**Step 1: Identify the Oxidation States**
- Chromium in \(\text{Cr}_2\text{O}_7^{2-}\) has an oxidation state of +6.
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