Study of Chelate Formation of Rhodium (III) with Eriochrome Cyanine R

eng Ansari Education and Research Society Journal of Ultra Chemistry 0973-3450 2319-8036 December 2008 4 2 291 294 juc 743 article Study of Chelate Formation of Rhodium (III) with Eriochrome Cyanine R Manu Sikarwar 1 Avnish Sharma 2 harti kungar 3 Department of Chemistry, Govt. P.G. College, Tonk, (Rajasthan) INDIA Department of Chemistry, M.L.V., Govt. College, Bhilwara (Rajasthan (INDIA) Department pf Chemistry, BITS (Pilani) Rajasthan (INDIA) <p style="text-align: justify;">The composition and stability of Rhodium-Eriochrome cyanine R (abbreviated as ECR) has been studied. The pink colored chelate has maximum wavelength at 530 nm and a composition of 1:2 (metal: chelating). The chelate is stable between pH 2 to 5. The values of Log K ( K= Stability constant ) as calculated by Dey and Coworkers, Job's method of Continuous Variation and Mole Ratio method using absorbance data are10.1, 9.9 and 10.2 respectively at pH 4 and at 25<sup>o</sup>C. The colored complex confirms to Beer's law over the rhodium concentration of 0.60 to 9.8 ppm.</p> https://journalofchemistry.org/paper/743/ Study of Chelate Formation Rhodium Eriochrome Cyanine R