FORMATION CONSTANTS OF THE COMPLEX SPECIES FORMED BY INTERACTION OF RARE- EARTH NITRILOTRIACETATE COMPLEXES WITH AN EQUIVALENT AMOUNT OF BASE [report]

A.K. Gupta, J.E. Powell
1962 unpublished
K f f t t MOTICC F o rm a tio n C o n s t a n ts o l th e C o m p le x S p e c ie * F o r m e d b y i n t e r a c t i o n of R a r e -E a rth Nit* i lo t r i s .c e t a t e C o m p ie x e e w ith an E q u iv a le n t A m o u n t nf B a se * « ASIM K . G U P T A a n d JA C K E . P O W E L L I n s titu te fo r A to m ic R e s e a r c h a n d D e p a r tm e n t of C h e m i s t r y Io w a S ta te U n i v e r s i ty , A m e s , Iow a A b s t r a c t --T h e f o r m a tio n c o n s t a n t s o f th
more » ... s t a n t s o f th e RChOH s p e c i e s , f o r m e d by i n t e r a c t i o n of in d iv id u a l r a r e -e a r t h n i t r i l o t r ia c e ta te s p e c i e s a n d K O H a t 2 5 *C a n d a n io n ic s t r e n g th of 0. i , h a v e b e e n d e t e i m i n e d by th e p o t e n t i o m e tr i c m e th o d . 1 . e . , c o m p u te d f r o m th e pH v a lu e s of e q u ilib r iu m m i x t u r e s c o n ta in in g v a ry in g p r o p o r t io n s o f r a r e -e a r t h c o m p le x an d b a s s . T h e r e l a t i o n s h i p of t h e s e c o n s t a n t s to th e io n -e x c h a n g e s e p a r a t i o n o f h a r e e a r t h s a t h ig h pH h a s b e e n d i s c u s s e d . I n tr o d u c tio n F r o m th e pH b u ff e r in g p r o p e r t i e s e n d th e s o lu b ility of r a r e -e a r t h n i t r i l o t r i a c e t a t e (N T A ) c o m p le x e s in b a s e , a a w e ll a s f r o m th e r e s u l t s o f s p r e v io u s i n v e s tig a tio n of th e r e a c t i o n of r a r e -e a r t h H E D T A c o m p le x e s w ith b a s e ,^ i t h a s b e e n a s s u m e d t e n t a t i v e l y th a t v e r y s p a r i n g ly s o lu b le n e u t r a l R C h s p e c i e s c o m b in e w ith an e q u iv a le n t a m o u n t of b a s e to f o r m y .
doi:10.2172/4720334 fatcat:lyd3qxgrefekhcxfn4bm4uqi5y