Argentometric Titrations of Some Halides and Pseudohalides using 7-Hydroxy-8-(phenyl azo)-Naphthalene 1,3-Disulphonic Acid as an Indicator

Chemical Laboratories, Agra College, Agra Manuscript received 30 December 1980, revised 10 March 1981, accepted 2 May 1981 7-Hydroxy-8 (phenyl azo) naphthalene 1,3-disulphonic acid has been used as an adsorption indicator in direct or reverse titrations of silver ion with halides and pseudohalides. The dye has also been used in the determination of iodide and bromide in a binary mixture.