jódtitrálásban

Jódtitrálás is a quantitative chemical analysis technique used to determine the concentration of certain substances. It is a type of redox titration where iodine is either produced or consumed during the reaction. The principle behind jódtitrálás involves the reaction of iodine with a substance that can be oxidized or reduced.

There are two main types of jódtitrálás: iodometry and iodimetry. Iodometry is an indirect method where an oxidizing agent is reacted with excess iodide ions to produce iodine. This liberated iodine is then titrated with a standard solution of sodium thiosulfate. The endpoint is typically detected using starch indicator, which forms a deep blue complex with iodine. The disappearance of the blue color indicates the completion of the titration.

Iodimetry, on the other hand, is a direct method where iodine itself acts as the titrant. A reducing agent is titrated directly with a standard solution of iodine. Again, starch is commonly used as the indicator. Jódtitrálás is a versatile technique used in various applications, including the determination of vitamin C content in food, the concentration of peroxides, and the analysis of certain metals. The accuracy of the method depends on the precise preparation of standard solutions and careful observation of the endpoint.