Chapter 20.10, Problem 20.16P

(a)

Interpretation Introduction

Interpretation:

The color of the given complex ion has to be identified.

(b)

Interpretation Introduction

Interpretation:

For the given complex ion, the energy difference between the ground and excited state has to be calculated.

Concept introduction:

Plank-Einstein relation:

The relationship between $\text{E}\text{,}\text{h}\text{and}\text{ν}$ is given by Plank-Einstein equation

$\begin{array}{l}\text{E}\text{=}\text{hν}\text{=}\frac{\text{hC}}{\text{λ}}\\ \text{where,}\\ \text{E}\text{-}\text{energy}\\ \text{h}\text{-}\text{Plank}\text{constant}\\ \text{ν}\text{-}\text{frequency}\\ \text{C}\text{-}\text{speed}\text{of}\text{light}\text{and}\text{λ}\text{-}\text{wavelength}\text{.}\end{array}$