[무기화학실험 A+보장] complex ion composition by job's method 예비보고서

본 내용은 " [무기화학실험 A+보장] complex ion composition by job's method 예비보고서 " 의 원문 자료에서 일부 인용된 것입니다. 2023.06.16

문서 내 토픽

• 1. Complex Ion Composition by Job's Method

  이 실험에서는 Ni2+와 en의 상호작용으로 3가지의 complex ion이 형성됩니다. 용액 내에서만 안정하고 분리가 불가능한 complex ion의 경우 용액 색깔로 화학종의 비를 구하는 방법인 Job's method를 사용합니다. Job's method는 중심 금속에 배위된 ligand 수에 따라 흡광도가 다른 것을 이용하여 배위수를 결정합니다. 실험에서는 농도가 같은 Ni2+와 en의 부피비를 x:(1-x)가 되도록 용액을 만들고, en의 몰분율 x를 다양하게 하여 주어진 파장에서의 흡광도를 측정합니다. 최대 흡광도가 나타나는 지점에서의 몰분율 x로부터 n을 결정할 수 있습니다.

Easy AI와 토픽 톺아보기

• 1. Complex Ion Composition by Job's Method

  The Job's method is a widely used analytical technique for determining the composition of complex ions in solution. This method involves the continuous variation of the concentrations of the metal ion and the ligand to determine the stoichiometry of the complex ion. By plotting the absorbance or some other property of the solution as a function of the mole fraction of the metal ion, the composition of the complex ion can be determined from the maximum or minimum point of the resulting curve. This approach is particularly useful for identifying the number of ligands bound to the metal ion and the overall charge of the complex. The Job's method is a powerful tool for studying the coordination chemistry of metal complexes and has applications in various fields, including analytical chemistry, biochemistry, and materials science. However, the method does have some limitations, such as the requirement for the complex to have a distinct spectroscopic signature and the potential for interference from side reactions or competing equilibria. Overall, the Job's method remains an important technique for the characterization of complex ion compositions in solution.