Potentiometric Investigation of the Dissociation of α‐Hydroxyisobutyric Acid in Aqueous Sodiumperchlorate Solutions of Unit Ionic Strength at 25°C

Abstract

Prom emf measurements i n t i t r a t i o n s a t c o n s t a n t l i g a n d c o n c e n t r a t i o n (cL) t h e formation function n is c a l c u l a t e d f o r aqueous s o l u t i o n s of a-hydroxyisob u t y r i c a c i d of 1-1 a t 2J.C. From CL -0.2 I4 on these f u n c t i o n s grow s e p a r a t e , keeping only one cross-over p o i n t i n cormmn. of a s s o c i a t e d forms a reasonably good agreement w a s obtained with t h e experiment. However, a f t e r c o r r e c t i o n of t h e emf d a t a f o r a l l e f f e c t s l e a d i n g t o a changed a c t i v i t y c o e f f i c i e n t o f t h e measuring e l e c t r o l y t e and for the consequent changes i n the formal d i s s o c i a t i o n c o n s t a n t , the d a t a again can best be described by a normal monoprotic d i s s o c i a t i o n behaviour.Considering then the presence