Advertisements
Advertisements
Question
Give reason for the following statement:
[Ti(H2O)]3+ is coloured while [Sc(H2O)6]3+ is colourless.
Advertisements
Solution
[Ti(H2O)]3+ is coloured because Ti3+(3d1) has one unpaired electron which undergoes a d-d transition so it is coloured. While [Sc(H2O)6]3+ (3d0) has no unpaired electrons so it will not undergo d-d transition so it is colourless.
APPEARS IN
RELATED QUESTIONS
Why is Sc3+ colourless while Ti3+ coloured? (Atomic number Sc = 21, Ti =22)
In the series Sc (Z = 21) to Zn (Z = 30), the enthalpy of atomization of zinc is the lowest, i.e., 126 kJ mol−1. Why?
Explain why Cu+ ion is not stable in aqueous solutions?
What are alloys?
Write balanced chemical equations for the conversion of `CrO_4^(2-)` to `Cr_2O_7^(2-)` in acidic medium and `Cr_2O_7^(2-)` to `CrO_4^(2-)`
in basic medium.
Give reasons Iron has the higher enthalpy of atomization than that of copper.
Which is the most stable oxidation state of iron?
While filling up of electrons in the atomic orbitals, the 4s orbital is filled before the 3d orbital but reverse happens during the ionisation of the atom. Explain why?
Give reasons for the following statement:
Transition metals and most of their compounds show paramagnetic behaviour.
Describe the oxidising action of potassium dichromate and write the ionic equation for its reaction with H2S.
