HNO₃
HNO3, also known as nitric acid, is a strong and highly corrosive acid
HNO3, also known as nitric acid, is a strong and highly corrosive acid. It is commonly used in various industries including manufacturing fertilizers, dyes, pharmaceuticals, and explosives.
Chemical properties:
– Nitric acid is a strong acid, meaning it ionizes completely in water, releasing hydrogen ions (H+) and nitrate ions (NO3-).
– It has a molecular formula of HNO3, indicating that it consists of one hydrogen atom, one nitrogen atom, and three oxygen atoms.
– Nitric acid is a highly reactive oxidizing agent, meaning it has the ability to accept electrons from other substances and cause them to lose electrons.
Physical properties:
– Nitric acid is a colorless to yellow liquid with a pungent odor.
– It has a strong affinity for water and is highly soluble in it.
– Pure nitric acid has a boiling point of 83 degrees Celsius and a melting point of -42 degrees Celsius.
– It can be concentrated to various strengths, with common concentrations including 68%, 65%, and 60%.
Uses of nitric acid:
1. Fertilizer production: Nitric acid is a key component in the production of ammonium nitrate, a widely used nitrogen fertilizer.
2. Dyestuff and dye intermediates: It is used in the production of various dyes and dyestuff intermediates, particularly for the textile industry.
3. Explosives manufacturing: Nitric acid is an essential ingredient in the production of explosives such as TNT (trinitrotoluene) and nitroglycerin.
4. Metal etching: It is used for etching and cleaning metals, especially in the electronics industry.
5. Laboratory and analytical applications: Nitric acid is commonly used as a reagent in laboratory experiments and compositions, particularly in analytical chemistry.
Safety precautions:
– Nitric acid is highly corrosive and can cause severe burns. It should be handled with extreme caution, and appropriate protective equipment (gloves, goggles, lab coat) should be worn.
– It must be stored in a cool, dry, and well-ventilated area in tightly closed containers, away from incompatible substances such as organic materials, alkalis, and reducing agents.
– When diluting nitric acid, it is important to always add acid to water slowly and with stirring to avoid splashing or vigorous reactions.
– Excessive inhalation and skin contact should be avoided, as it can lead to respiratory and skin irritation.
– In case of accidental contact or ingestion, immediate and thorough flushing with water is crucial, and medical assistance should be sought.
In summary, nitric acid (HNO3) is a strong, corrosive acid with multiple uses in various industries. It has important chemical and physical properties, as well as safety precautions that must be followed when handling it.
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