For Daily Free Study Material Join wiredfaculty

Name: Wired Faculty - The Best Learning App
Rating: 4.6 (1864 reviews)

Question

Predict which of the following will be coloured in aqueous solution? Ti3+, V3+, Cu+, Sc3+, Mn2+, Fe3+ and Co2+. Give reason for each.

Prabhat Rajore · Accepted Answer

Predict which of the following will be coloured in aqueous solution? Ti3+, V3+, Cu+, Sc3+, Mn2+, Fe3+ and Co2+. Give reason for each. - Wired Faculty

Ti³⁺	3d¹ configuration	Species is coloured (purple)
V³⁺	3d² configuration	Species is coloured (green)
Cu⁺	3d¹⁰ 4s°configuration	Species is colourless.
Sc³⁺	3d° 4s⁰	It does not contain unpaired e^– in 3d orbitals.
Mn²⁺	3d⁵	Colourles. It does not contain unpaired electron in 3d-orbitals coloured (pink). All 5 electrons unpaired in five 3d orbitals.
Fe³⁺	3d⁵	Coloured (yellow). All 5 electrons unpaired in 3d orbitals.
Co²⁺	3d⁷	Coloured (pink). Three e^– unpaired in 3d-orbitals.

The D-And-f-Block Elements