MALATE COMPLEX OF COPPER

Malate complex of copper has been investigated by P_H titration method within the P_H range of 2 to 6. A neutral complex A₁ is formed at lower P_H due to the reaction of a copper ion and malic acid with the liberation of the two protons. The equilibrium constant of the reaction has been found to be 3 89 x10^-5 This complex with increase in pa dissociates into a H⁺ ion and complex C^1-, the dissociation constant being 4.74x 10^-5.