Predict which of the followingwill be coloured in aqueous solution? `Ti^(3+),V^(3+),Cu^(o+),Sc^(3+),Mn^(2+),Fe^(2+)` and `Co^(2+)` Give reasons for each.

Explanation

To determine which of the given ions will be colored in aqueous solution, we need to analyze their electronic configurations and the presence of unpaired electrons. Colored solutions typically arise from the presence of unpaired electrons in d-orbitals, which can absorb specific wavelengths of light.

### Step-by-Step Solution:

1. **Titanium (Ti³⁺)**:
- Atomic Number: 22
- Electronic Configuration: [Ar] 3d² 4s²
- For Ti³⁺: Remove 3 electrons (2 from 4s and 1 from 3d) → Configuration: 3d¹
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