• V TEJESWARA RAO
• P LAKSHMI KISHORE
• G.Nageswara Rao

The protonation constants values of mercaptosuccinic acid were determined in Dimethyl formamide and Acetonitrile -water mixtures (0–60% v/v) at 303.0 K at an ionic strength of 0.16 M using pH-metric technique. The protonation constants were calculated with the computer program MINIQUAD75 and selection of the best fit chemical models was based on the statistical parameters. The log K values were found to be an increase with increase of the organic solvent content. The linear variations of the protonation constants with the reciprocal of the dielectric constant of the medium have been attributed to the dominance of electrostatic forces. Distribution of species, protonation equilibria and effect of influential parameters on the protonation constants have also been presented.

Mercaptosuccinic acid, Dimethylformamide, Acetonitrile, protonation constant, dielectric constant

"A pH metric determination of protonation constants of mercaptosuccinic acid in Dimethylformamide and Acetonitrile -water mixtures", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 12, page no.452-458, December-2018, Available :http://www.jetir.org/papers/JETIR1812874.pdf

"A pH metric determination of protonation constants of mercaptosuccinic acid in Dimethylformamide and Acetonitrile -water mixtures", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 12, page no. pp452-458, December-2018, Available at : http://www.jetir.org/papers/JETIR1812874.pdf