What Are the Properties of Chlorine?

Chlorine is a non-metallic element and belongs to one of the halogen groups. Chlorine is a yellow-green gas at normal temperature and pressure. It is very reactive and toxic. Chlorine exists extensively in nature in the form of a compound state, and is also of great significance to the physiological activities of the human body.

1774 Swedish chemist

Chlorine in the free state in nature exists in the atmosphere and is one of the main elements that destroy the ozone layer. Chlorine is decomposed into two chlorine atoms (free radicals) by ultraviolet rays. Most are usually in the form of chlorides (Cl-), the most common being sodium chloride (table salt, NaCl).

The elemental chlorine is composed of two chlorine atoms and has the chemical formula Cl. Gaseous chlorine is commonly called chlorine, and liquid chlorine is commonly called liquid chlorine.

The English name chloride comes from the Greek word khlros (ó ', light green). The Chinese characterizes the gas as green, creating the word "chlorine". Japanese and Korean are called "salts" because chlorine is one of the main components of salt. "(Japanese Kanji writing" ").

Inorganic (valence in parentheses): chloride (-1), hypochlorous acid (+1), hypochlorite (+1), chlorite (+3), chlorite (+3), chlorine Acid (+5), chlorate (+5), perchloric acid (+7), perchlorate (+7)

Organochlorine compounds.

There are two types of chlorine : ³⁵ Cl and ³⁷ Cl.

To test whether water contains chloride ions, add nitric acid silver ions (such as silver nitrate) to it (add acidic silver nitrate to exclude other ionic interferences). The reaction between silver ions and chloride ions will produce silver chloride white precipitate, the reaction formula:

Ag ⁺ + Cl- AgCl

1. Precautions for operation

Strictly enclosed to provide adequate local exhaust and comprehensive ventilation. Operators must be specially trained and strictly abide by the operating procedures. It is recommended that the operator wear an air respirator, a mask-type gas protective clothing, and rubber gloves. Away from fire and heat sources, smoking is strictly prohibited in the workplace. Keep away from flammable and combustible materials. Prevent gas from leaking into the workplace air. Avoid with

Chlorine is a yellow-green gas with a higher density than air (3.214g / L), melting point 101.0 ° C, boiling point 34.4 ° C, and has a strong pungent odor.

chlorine

Chlorine gas can irritate the eyes and respiratory tract mucous membranes. It can cause tears, cough, small amount of sputum, chest tightness, bronchitis and bronchitis, pulmonary edema and other respiratory symptoms, which can lead to severe shock and death. Was used as a chemical weapon (asphyxiating poison) during World War I

Chlorine is a serious hazard to the environment and can cause pollution to water bodies.

At the same time, chlorine can support combustion, and wet chlorine is highly corrosive.

Therefore, when contacting chlorine gas, you must pay attention to strict protection of the whole body. It is strictly forbidden to directly smell and contact chlorine gas, and do not directly discharge chlorine-containing exhaust gas into the atmosphere. ^[3]