Preliminary Analysis of Free Hydrochloric Acid in Iron Chloride Solution
Mark Amrich and William Lehrer, Photofabrication Engineering, Inc.
To measure the free hydrochloric acid in a ferric chloride
Ferric Chloride is mixed with potassium fluoride in a nonaqueous
environment. The ferric & ferrous irons are
precipitated out as ferric fluoride leaving the free hydrochloric
acid to be analyzed by simple titration, using the millivolt scale
on a ph meter.