The standard reduction potentials of `Co^(2+)` and `Co^(3+)` are -0.28 V and 1.8 V respectively. Which should be a better oxidising agent in water: `Co^(2+)` or `Co^(3+) ` ?

Explanation

To determine which ion, \(Co^{2+}\) or \(Co^{3+}\), is a better oxidizing agent in water, we can analyze their standard reduction potentials.

### Step-by-Step Solution:

1. **Identify the Standard Reduction Potentials**:
- The standard reduction potential for \(Co^{2+} + 2e^- \rightarrow Co\) is \(-0.28 \, V\).
- The standard reduction potential for \(Co^{3+} + e^- \rightarrow Co^{2+}\) is \(1.8 \, V\).

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