Freshening up Old Methods for New Students: A Colorful Laboratory Experiment to Measure the Formation Constants of Ni(II) Complexes Containing Ethane-1,2-Diamine

This is an easy and inexpensive laboratory experiment in which undergraduate students at the Bachelor’s degree level Chemistry can measure formation constants of complexes [Ni(en)n(OH2)6–2n]2+ (n = 1, 2 or 3; en ethylenediamine) through acid–base titration. The background information necessary to understand activity involves familiarity with equilibria basic coordination chemistry, lab experience uses only common glassware a pH meter. mathematical treatment results based on Bjerrum’s function. Details activity, including full procedural experimental data, are provided. be augmented additional work Job’s method analyze stoichiometry under investigation.