what is iodine
iodine is a chemical element, located in the seventh group of the periodic table, its atomic number 53, a non-metallic element, symbolized by the symbol I, gray color, belongs to the family of halogens, and characteristic is that it is able to acquire electrons from other materials, where it combines With it, it forms chemical compounds, and at the same time can lose its electrons and oxidize quickly.
It was discovered by French chemist Bernard Courtois, identified in the ashes of the burned seaweed, and described by scientist G. Lussac as a chemical element.
Properties of iodine
- It has the sublimation property: that is, its condition is originally gaseous and can be converted to solid-state without passing liquid state.
- Capable of acquiring electrons from other materials.
- Combines with materials to form chemical compounds.
- Lose electrons quickly.
- Able to combine with other halogens; bromine, chlorine, and fluorine. Melt iodine at a temperature of 113.60 ° C.
- Its boiling point reaches 185.24 Celsius.
- Purple acidic vapor.
- Interact with any air
- The water is very salty, and it is called brack, where it is extracted from oil and natural gas fields.
- Laterite, which contains calcium iodate.
- Seawater containing salt, it is a component.
- Marine animals and plants, where their bodies contain a high content of iodine.
How to detect iodine
It can be detected when the compounds containing it are mixed with other substances, such as:
- Sulfuric acid, where vapor iodine vapor begins to escalate.
- If it interacts with silver nitrate, a yellow precipitate is called silver iodide.
- When it interacts with copper sulfate it will be a brown precipitate.
- When it interacts with mercury chloride it is a red precipitate.
- it turns the starch leaf into the blue.
- Silver iodide is used in photographic films, it is a light-sensitive material.
- Bakers use sodium iodate to improve the quality of bread made from flour.
- Table salt; it is called iodized salt
- its solution is used to purify and sterilize water.
- Complex compounds are made for first aid wounds called an iodine carrier.
- Iodine tincture: used to disinfect wounds and drinking water.
- Silver iodide: Used in filming.
- Potassium iodide: Tablets are given to people in disaster areas, so as to limit the body’s ability to absorb radioactive iodine.
- Tungsten: Used to fix the filaments in light bulbs,
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