A Method For the Determination of Chloric Acid

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

An Improved Method of Determining Solubility

In the continuation of work on acid sodium and acid potassium phthalates as standards in acidimetry and alkalimetry, it seemed desirable to study among other properties, the solubility of these salts

Some Features of Iowa Ground Waters, II

About two years ago the writer read before this body a paper, under the above title, giving a general statement of his work on the quality of Iowa well waters. The accumulating experience of the past two years seems to justify at this time a statement of some additional facts that seem important and which may be of interest to the Iowa Academy of Science

A Method for the Determination of Hydriodic and Hydrobromic Acids

About a year ago I presented to the Iowa Academy of Sciences a paper on a method of determining chloric acid by the reduction of the acid with metallic iron in the presence of dilute sulphuric acid, and the titration of the hydrochloric acid formed, by the method of Volhard. The same paper, somewhat extended, appeared in another periodical. In this communication it was suggested that the method might probably be used equally well for the determination of bromic and iodic acids, and two determinations of bromic acid were included in the paper

Logarithmic Factors for Use in Water Analysis

Every chemist who does work in the analysis of water frequently has occasion to calculate over data given in terms of compounds and grains per gallon, to ions per liter or parts per million. Frequently he must carry out the reverse processes and convert his ions per liter into grains of compounds per gallon in order to make his results more comprehensible to the non-technical mind. Such operations are likely to be vexatious and time-consuming

Periodical Literature in Iowa on the Subject of Chemistry

Two years ago the author published in the proceedings of the Iowa Academy of Science a list of the chemical periodicals, then present in the libraries in the State. The purpose was, of course, to make known the presence of these periodicals to chemists in the state who have occasion from time to time to use them for reference purposes. Since that date many changes have occurred. Some periodicals have been dropped; more have been added, and many partial files have been made more nearly or quite complete. It seemed best, therefore, to offer a revised list for publication in the Proceedings of the present year

The Increase in Potential When Some Reducing Agents Are Added to Certain Oxidants

Several years ago Forbes and Bartlett found that ferrous sulfate caused an increase in potential when added to dilute chromate in dilute sulfuric acid, and that chlorides were fatal to this rise. Arsenious acid and ferrocyanide produced much the same effect. Of the oxidizing agents only dichromate showed this rise when treated with reducing agents. So far as known to the writer this subject had received no further systematic study when he took it up near the beginning of the current year. So far as his study has extended, the phenomenon observed by Forbes and Bartlett seems to be by no means an isolated one

Periodical Literature in Iowa on the Subject of Chemistry

The following is a list of the chemical periodicals in the State of Iowa, with the extent of the files and the names of the libraries in which they may be found. The list is prepared and published for the information of chemists who may have occasion to refer to such periodicals in their work. So far as known the books of any file may be used for reference purposes in the libraries which contain them and under certain restrictions, in some cases, they may be taken out for purposes of reference. In some cases the books are in the private libraries of chemists connected with the institutions mentioned, but this does not preclude their use by outside parties

The Action of Certain Oxidizing Agents in Sulfite and Its Determination

The oxidation of sulfite in acid solution by dichromate, bromate and permanganate was found to be incomplete, the oxidant used being several per cent short of that required in each case to change sulfite ion completely into sulfate ion. This is probably clue to the formation of dithionate, which is not further oxidized. Iodate behaves very differently

The Action of Chloric Acid on Metals

In the course of my work a year ago on Silver as a Reducing Agent, in which the action of finely divided silver on chloric, iodic and chromic acids was studied quantitatively, there was occasion to study the literature relating to the action of chloric and related acids on other metals. It soon appeared clear that the amount of information to be gained about the action of chloric acid in particular, on the metals was very meager, and it appeared also that there were several errors, whose origin in most cases could not be traced, that had apparently come down from treatise to treatise to the present time. It seemed, therefore, desirable to attempt to make some contribution to the subject, and if possible to clear up some contradictions and doubtful points, and this seemed the more desirable since chloric acid is one of the few strong oxidizing acids, which can be obtained in the free state easily and in pure condition, and which is fairly stable