Question

which of the following cations are colured in aquouse solution and why?
Sc3+ V3+ Ti4+ Mn2+​

Answer 1

Answer:

Ti = (Atomic number 22) = 3d2 4s2 and Ti4+ = 3d0 4s0. As d-orbital is empty, it is colourless. Mn = (Atomic number 25) = 3d5 4s2 and Mn2+ = 3d5 4s0. As d-orbital is having 5 unpaired electrons, it shows pink color.

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