摘要
用电位滴定法研究了新显色剂３－羧基苯偶氮氯磺酚的离解作用。用分光光度法测定了该显色剂的离解常数及其与Ｖ（Ⅳ）形成的配合物的稳定常数。离解常数Ｋ５＝２．９２×１０－７、Ｋ６＝４．７８×１０－１０、Ｋ７＝２．３９×１０－１２，表观稳定常数ｌｇＫＳ′＝５．９８±０．４９（Ｐ＝０．９５）。
he
potentiometric method was used to investigate the dissociation of
mcarboxyphenylazochlorosulfophenol.The dissociation constant of the reagent and stability
constant of its vanadium() complex have been determined by spectrophotometric method.The
dissociation constants of the reagent are K5(OH)=2.9210-7,K6(OH)=4.7810-10,and
K7(OH)=2.3910-12 respectively,the stability constant of the complex is lgKs=5.980.49(P=0.95).
出处
《化学试剂》
CAS
CSCD
1999年第3期138-140,共3页
Chemical Reagents
基金
贵州省科委科技基金
关键词
羧基
苯偶氮氯磺酚
显色剂
钒
配合物
离解
mcarboxyphenylazochlorosulfophenol,potentiometric method,spectrophotometric
method
