[Co(H 2 O) 6 ] 3+ absorbs at 549 nm while [V(H 2 O) 6 ] 2+ absorbs at 806 nm.

The wavelength of absorption is inversely related to the energy gap (D o ). Since [V(H 2 O) 6 ] 2+ absorbs at a longer wavelength (806 nm) compared to [Co(H 2 O) 6 ] 3+ (549 nm), it has a smaller D o .

[Co(H 2 O) 6 ] 3+ absorbs at 549 nm while [V(H 2 O) 6 ] 2+ absorbs at 806 nm.

The wavelength of absorption is inversely related to the energy gap (D o ). Since [V(H 2 O) 6 ] 2+ absorbs at a longer wavelength (806 nm) compared to [Co(H 2 O) 6 ] 3+ (549 nm), it has a smaller D o .

Solved

[Co(H₂O)₆]³⁺ Absorbs at 549 Nm While [V(H₂O)₆]²⁺ Absorbs at 806

Question 21

Multiple Choice

[Co(H₂O) ₆]³⁺ absorbs at 549 nm while [V(H₂O) ₆]²⁺ absorbs at 806 nm.

A) D_o is larger for the Vanadium compound
B) D_o is smaller for the Vanadium compound
C) D_o is the same for the two compounds because they have the same ligands
D) there is no way to compare D_o for the two compounds from the data given

Correct Answer: