| Stability Constants of Hydrazine Carboxylic Acid Complexes with Some Bivalent Metal Ions |
| R. K. Choudhary* And J. Thakur ** |
*Department of Chemistry C. M.Sc. College, Darbhanga-846 004, India **Department of Chemistry Bihar University, Muzaffarpur-842 001, India |
| Abstract
The proton-ligand stability constants of hydrazine carboxylic acid (HCA) and stability constants of its chelates with Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) have been determined, using Calvin-Bjerrum pH-metric method as modified by Irving and Rossotti in aqueous media at a constant ionic strength of 0.1M KCl and at a constant temperature (20 ± 0.2ºC). The stability constants of the complexes follow the order Cu(II) > Zn(II) > Ni(II) > Co(II) > Cd(II) which is in accordance with Irving-Williams natural order. |
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