DETERMINATION OF STABILITY CONSTANT OFSOME METAL IONCOMPLEXES WITH (N-TRIS [HYDROXYLMETHYL] METHYL (2-AMINO ETHANESULFONICACID)(TES)

Ionization constant was been determined for N-tris [hydroxyl methyl] methyl (-2-amino ethane sulfonic acid)(TES) has been determined in 250C.  The value of pka consider as7.5 and kais(3.1 x 10-8 ) respectively, Measurement of stability constants for various complexes with Ag+1, Co+2,Ni+2, Cu+2 , Cd+2,Cr+3 metal ions was determined, And measured recommended have been performed. The result showed that (TES) behave as bi dentate lig and with complexes being formed was of (1:1) ratio. Measurement of hardness and softness parameters of (TES) have been hardness parameter (α) of (1.46) and softness of (β) was ( 5.93).