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Urea

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Identification
Molecular formula
CH4N2O
CAS number
57-13-6
IUPAC name
nitric acid;urea
State
State

Urea is typically a solid at room temperature. It is commonly available in the form of small white pellets or prills for use in fertilizers, or as a powder for laboratory use.

Melting point (Celsius)
133.00
Melting point (Kelvin)
406.15
Boiling point (Celsius)
213.00
Boiling point (Kelvin)
486.15
General information
Molecular weight
60.06g/mol
Molar mass
60.0560g/mol
Density
1.3200g/cm3
Appearence

Urea is a colorless, crystalline substance. In its pure form, it is odorless and possesses a cool, non-greasy texture. Urea is highly soluble in water, forming a mildly alkaline solution.

Comment on solubility

Solubility of Nitric Acid and Urea

When discussing the solubility of nitric acid (HNO₃) and urea (CO(NH₂)₂), it's essential to recognize their distinct properties:

Nitric Acid

HNO₃ is highly soluble in water. Its solubility can be attributed to:

  • Polarity: The presence of polar O-H bonds allows strong hydrogen bonding with water molecules.
  • Ionization: When dissolved, HNO₃ ionizes completely, producing H⁺ and NO₃⁻ ions, enhancing its solubility.
  • Concentration: It can be found in concentrated forms (around 68% by weight) but remains miscible with water in any proportion.

Urea

On the other hand, CO(NH₂)₂ is also very soluble in water. Key factors include:

  • Hydrogen Bonding: Urea molecules can form hydrogen bonds with water, facilitating dissolution.
  • Polar Nature: The polar carbonyl and amine groups contribute to its affinity for water.
  • High Solubility: Urea is soluble in both cold and hot water, typically dissolving at around 334 g in a liter.

In summary, both HNO₃ and CO(NH₂)₂ exhibit excellent solubility in water due to their polar structures and ability to form hydrogen bonds. This characteristic makes them significant in various chemical reactions and applications.

Interesting facts

Nitric Acid: An Industrial Powerhouse

Nitric acid, known scientifically as nitric acid (HNO3), is a colorless and highly corrosive liquid that plays a crucial role in various industrial applications. Here are some fascinating facts about this compound:

  • Fertilizer Production: One of the primary uses of nitric acid is in the production of fertilizers, particularly ammonium nitrate, which is essential for agriculture.
  • Explosive Industries: Due to its oxidizing properties, nitric acid is a key component in the manufacture of explosives such as TNT (trinitrotoluene) and nitroglycerin.
  • Metal Processing: It is widely used in the etching and cleaning of metals, playing a significant role in the manufacturing and metalworking industries.
  • Historical Significance: Historically, nitric acid has been used in the alchemical processes of the past and has contributed to the development of modern chemistry.
  • Environmental Impact: While nitric acid is beneficial, it can also lead to environmental concerns. Its production and use can contribute to air pollution and acid rain.

Caution and Safety

Handling nitric acid requires caution. It is important to understand its hazardous nature to prevent accidents:

  • Corrosive Nature: Always use appropriate protective gear, including gloves and goggles.
  • Storage: Store in labeled containers away from incompatible substances to avoid dangerous reactions.

In summary, nitric acid is a compound with a multitude of industrial applications and a significant historical impact on chemistry, making it an essential subject of study for students and scientists alike.

Urea: The Versatile Organic Compound

Urea, recognized chemically as carbamide (CO(NH2)2), is a simple organic compound that has profound implications in both biological and industrial contexts. Here are some engaging points about urea:

  • Biological Role: Urea is a waste product formed from the breakdown of proteins in the body, primarily excreted through urine, making it integral to nitrogen metabolism.
  • Fertilizer Component: In agriculture, urea serves as one of the most widely used nitrogen-release fertilizers, providing essential nutrients to crops.
  • Medical Applications: Urea is utilized in various medical applications, including as a component in certain skincare products that help retain moisture.
  • Chemical Synthesis: It acts as a feedstock in the synthesis of a multitude of compounds, including plastics and resins.
  • Environmental Considerations: While beneficial, excessive use of urea in agriculture can lead to nitrogen runoff and contribute to environmental issues like eutrophication.

Innovative Research

Recent research into urea explores its potential to aid in:

  • Bioremediation: Utilizing urea as a nitrogen source in the treatment of wastewater.
  • Sustainable Farming: Developing slow-release formulations to minimize environmental impact.

Thus, urea is more than just a molecule; it is a versatile compound that bridges the gap between life sciences and industrial applications, making it a vital topic for students and researchers in chemistry.

Synonyms
UREA NITRATE
124-47-0
Acidogen nitrate
Urea mononitrate
Urea, mononitrate
Urea nitrate (wet)
DHJ35702MG
urea nitrate (1:1)
RefChem:193237
204-703-5
nitric acid;urea
MFCD00054386
UNII-DHJ35702MG
urea nitrogen
HSDB 1021
EINECS 204-703-5
UN0220
UN1357
UREA NITRATE [MI]
UREA NITRATE [HSDB]
CH5N3O4
SCHEMBL237222
DTXSID60924672
AAA12447
EINECS 241-672-7
Carbamimidic acid--nitric acid (1/1)
Urea nitrate (wetted with ca. 20% water)
NS00079007
U0015
Q424712
Urea nitrate, wetted with not <20% water, by mass
Urea nitrate, dry or wetted with < 20% water, by mass
Urea nitrate, dry or wetted with <20% water, by mass
Urea nitrate, dry or wetted with <20% water, by mass [UN0220] [Explosive 1.1D]
Urea nitrate, wetted with not <20% water, by mass [UN1357] [Flammable solid]