Representative Procedures in Quantitative Chemical Analysis
The book Representative Procedures in Quantitative Chemical Analysis was written by author Frank Austin Gooch Here you can read free online of Representative Procedures in Quantitative Chemical Analysis book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Representative Procedures in Quantitative Chemical Analysis a good or bad book?
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In either process iodic acid and hydriodic acid enter into the reversible reaction HI0 3 + 5 HI <= 3 1 2 + 3 H 2 0. Under suitable conditions this reaction may be utilized for the determination of iodine in iodides or in iodates. At all volumes ordinarily used in analysis the direct action is practically com- plete when the hydriodic acid is in moderate excess. In order that the reaction given above may be realized when the iodic acid is in excess attention must be paid to limiting the volume of the water solution in which the reaction takes place. In presence of an appreciable amount of hydrochloric acid, or a PROCEDURES IN VOLUMETRIC ANALYSIS 175 chloride, a secondary reaction takes place which results in the formation of iodine chloride; and this action may be com- plete in presence of a suitable amount of hydrochloric acid : * 2 1 2 + KIO 3 + 5 HC1 = 5 IC1 + 3 H 2 0. Determination of lodates. When potassium iodide in excess and dilute hydrochloric acid, or dilute sulphuric acid, are added to the solution of an iodate, iodine is immediately set free according to the equation MI0 3 + 5 KI + 6 HC1 = 5 KC1 + MCI + 3 H 2 + 3 1 2 .
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