1. What are the various types of electronic transitions that are responsible for the absorption of radiation in the UV-Visible region of the electromagnetic spectrum? What type of electronic transition is responsible for the absorption of radiation in the Fe (II) -1,10-phenanthroline complex?

1. The method of continuous variations is an alternative spectrophotometric method used to determine the formula of a complex.

1. Search the literature for the formation constant and molar absorptivity of Fe(II)-1,10-phenanthroline complex. Provide references. Comment on the magnitude of these values from the perspective of an analytical chemist.

1. What other experimental designs/methods could you use in order to determine the formula of a complex?