Metal complex study is well established area of research work. To study the formation constant of ligand with metal ions in solution we selected conductometric method because of its various advantages such as low cost eco-friendly less time consuming paper thermodynamic calculation with different parameters and most importantly easy to operroate. Conductometric methods can be used to determine thermodynamic parameters like enthalpy entropy Gibbs free energy. This book emphasis on to understand the effect of ionic size solvent composition temperature and the nature of the ligand.