Why iodometric titrations are done in dark?

HomeWhy iodometric titrations are done in dark?
Why iodometric titrations are done in dark?

The reaction mixture should be kept in the dark before titration because light accelerates a side reaction in which iodide ions are oxidized to iodine by atmospheric oxygen.

Q. What is the scientific name for iodine?

Iodine is a chemical element with the symbol I and atomic number 53. The element was discovered by the French chemist Bernard Courtois in 1811, and was named two years later by Joseph Louis Gay-Lussac, after the Greek ἰώδης “violet-coloured”.

Q. Does iodine have any other name?

Atomic number 53, Cadexomer Iodine, Diatomic Iodine, I2, Iode, Iode de Cadexomer, Iode Diatomique, Iode Moléculaire, Iode Mono-atomique, Iode de Povidone, Iode de Sodium, Iodide, Iodized Salt, Iodure, Iodure de Potassium, Iodure de Potassium en Solution Saturée, Iodure de Sodium, KI, Lugol’s Solution, Molecular Iodine.

Q. Why is iodine kept in a dark bottle?

In presence of light Iodine solution undergoes a photo-decomposition reaction so it must be stored in a dark bottle , generally in amber bottle to minimize the amount of light that the solution is exposed to.

Q. What is kept in dark bottles?

Thus, to avoid the formation of phosgene, chloroform is stored away from light and air. In dark coloured bottles, no light can enter. Thus, oxidation of chloroform to phosgene can be avoided. Thus, chloroform is stored in closed dark coloured bottles.

Q. Does light affect iodine?

Similar studies indicate that iodine is reduced by physical environmental factors such as light, heat and humidity.

Q. Does iodine evaporate from salt?

Salt that is iodized with iodide may slowly lose its iodine content by exposure to excess air over long periods.

Q. Does iodine degrade?

Elemental iodine readily sublimes and is then rapidly lost to the atmosphere through diffusion. As in most chemical reactions, elevated temperature increases the rates of the reactions that form elemental iodine and increases the rate of evaporation of iodine.

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