Cuprous ion is colourless while cupric ion is coloured because

Question

Cuprous ion is colourless while cupric ion is coloured because (A) both have half-filled p and d-orbital (B) cuprous ion has completed d-orbital and cupric ion has incomplete d-orbital (C) cuprous ion has incomplete d-orbital and cupric ion has complete d-orbital (D) both have unpaired electrons in d-orbital

Tardigrade Admin · Accepted Answer

Cuprous ion has completed d-orbital (3d10) hence it is colourless, while cupric ion has incomplete d-orbital (3d9) and therefore, it is coloured. Cuprous ion (3d10): Cupric ion (3d9):

Q. Cuprous ion is colourless while cupric ion is coloured because

both have half-filled p and d-orbital

cuprous ion has completed d-orbital and cupric ion has incomplete d-orbital

cuprous ion has incomplete d-orbital and cupric ion has complete d-orbital

both have unpaired electrons in d-orbital

Cuprous ion has completed d-orbital $(3 d^{10})$ hence it is colourless, while cupric ion has incomplete d-orbital $(3 d^{9})$ and therefore, it is coloured. Cuprous ion $(3 d^{10}) :$ Cupric ion $(3 d^{9}) :$