Stability constants of Iron (II) and lead (II) complexes ofanthranillic and sulphanillic acids

Stability constant of complexes formed by Fe^++ and Pb ^++ ions with Anthranillic acids And sulphanillic acids were established . Results which are obtained indicated that instability of metal ion complexs are in harmony with the ease of disociation of the acids involved. Overall Enthalpy and Entropy of complex formation were calculated from stability constant measurements at different temperatures, Also experimental results showed that metal ion complex formations with Anthranillic acid are exothermic while those of sulphanillic acid are endothermic.