In this lecture, we will discuss the chemical substance named Iodine (I).
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Definition of I:
Iodine, also known as Iot in Vietnamese or Iodine in English, is a chemical element with the symbol I and atomic number 53. The atomic mass of Iodine is 126.90447 amu. Iodine usually exists in the molecular form of I2, consisting of two Iodine atoms linked together. Additionally, Iodine can also exist in the form of ions, such as the I- ion. -
Properties of I:
2.1 Physical properties: Solid Iodine is bluish-black, and forms shiny crystals. When it converts to gas, Iodine has a deep purple color. The smell of Iodine is quite distinctive, and most people can identify it. The pH of Iodine solution is not characteristic as it is neither acidic nor basic.
2.2 Chemical properties: Iodine is easily oxidized, and can form complexes with other substances, such as sulfur, phosphorus, lead… -
Common chemical equations:
Iodine can react with metals, acids, non-metals, and salts. Examples include the reaction between Iodine and hydrogen, Iodine and nitric acid, Iodine and chlorine, Iodine and sodium chloride salt… -
Preparation of I:
4.1 Laboratory preparation: Iodine is usually prepared by oxidizing Iodide in strong acid solution.
4.2 Industrial preparation: In the industry, Iodine is often produced from Iodine-rich water sources, such as salty water layers beneath the sea.