Complex formation between the Fe3+ ion and some substituted phenols. Part 1.—Spectrophotometric determination of the stability constant of ferric salicylate

✍ Scribed by Ernst, Z. L.; Menashi, J.

• Book ID: 111691104
• Publisher: Royal Society of Chemistry
• Year: 1963
• Weight: 614 KB
• Volume: 59
• Category: Article
• ISSN: 0014-7672
• DOI: 10.1039/tf9635901794

✦ Synopsis

The theoretical principles underlying the spectrophotometric method of continuous variations of studying complex formation are discussed, and a new method of determining stability constants is described. The method enables the continuous variation data to be used directly to determine not only the equilibrium concentration of the complexes in the solution but also to calculate, with considerable accuracy, the H+ concentration of the solution. The method has been applied to determine the thermodynamic stability constant K = {FeSal+}/{Fe3+}{Sal2-) for the ferric salicylate complex ; at 25°C its value is 2.73 x 1017.