In the methods for the determination of chloric acid by reduction, metallic zinc in some form and ferrous sulphate have been the reducing agents most used, though sulphur dioxide and formaldehyde have also been employed. The conditions under which the two former reducing agents have been used have been much varied. Thus Thorpe and Eccles used the zinc-copper couple, and determined with a solution of silver the chloride formed from the chlorate. Bothamley and Thompson showed that the results by this method were too low unless sulphuric acid was added near the end of the reduction to dissolve any basic salts of zinc. By the same method Becker found the results too low and preferred to use zinc dust and a little copper sulphate. Fleissner § used zinc dust and boiled the neutral solution one hour, but Becker attained complete reduction only by using a large excess of zinc dust with sufficient sulphuric acid to dissolve it completely without the aid of heat.
Proceedings of the Iowa Academy of Science
©1903 Iowa Academy of Science, Inc.
Hendrixson, W. S.
"A Method For the Determination of Chloric Acid,"
Proceedings of the Iowa Academy of Science, 11(1), 147-150.
Available at: https://scholarworks.uni.edu/pias/vol11/iss1/21