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Sodium chromate

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Identification
Molecular formula
Na2CrO4
CAS number
7775-11-3
IUPAC name
disodium;dioxido(dioxo)chromium
State
State
Sodium chromate is typically found in a solid state at room temperature. It is water-soluble and forms a yellow solution when dissolved.
Melting point (Celsius)
792.00
Melting point (Kelvin)
1 065.00
Boiling point (Celsius)
1 000.00
Boiling point (Kelvin)
1 273.00
General information
Molecular weight
161.97g/mol
Molar mass
161.9740g/mol
Density
2.7220g/cm3
Appearence

Sodium chromate appears as a yellow crystalline solid. It can exist in both an anhydrous form and in hydrated forms such as tetrahydrate. The crystals are typically bright yellow in color.

Comment on solubility

Solubility of Disodium Dioxido(dioxo)chromium

Disodium dioxido(dioxo)chromium, with its chemical formula Na2CrO4, demonstrates a notable solubility profile that is influenced by several key factors:

  • Solubility in Water: This compound is highly soluble in water. The presence of sodium ions enhances its ability to dissolve, leading to an increased ionic interaction.
  • Temperature Dependence: As with many salts, the solubility of Na2CrO4 may increase with temperature, thereby promoting greater dissolution in hot water compared to cold.
  • pH Influence: The solubility can also be affected by the pH of the solution. In alkaline conditions, the compound maintains higher solubility, while acidic environments may lead to precipitation of chromium species.
  • Complex Formation: The ability to form complex ions with other transition metals can modify the solubility, leading to various behaviors in different chemical contexts.

In summary, the solubility of disodium dioxido(dioxo)chromium is highly influenced by external conditions such as temperature and pH. Its characteristic of being a soluble chromium compound is pivotal for its applications in various chemical reactions and processes.

Interesting facts

Interesting Facts about Disodium Dioxido(dioxo)chromium

Disodium dioxido(dioxo)chromium, often referred to in scientific circles for its unique properties, is a compound of significant interest in the field of chemistry. Here are some captivating aspects:

  • Oxidation States: This compound features chromium in an oxidation state of +6, which is significant because compounds in this oxidation state are renowned for their reactivity and are often utilized in various chemical synthesis processes.
  • Environmental Concerns: Chromium(VI) compounds are recognized for their toxicity and potential carcinogenic effects. Consequently, understanding their chemistry is crucial for developing safety protocols in industrial applications.
  • Applications: Dioxido(dioxo)chromium compounds play a pivotal role in diverse fields such as:
    • Industrial catalysis
    • Leather tanning
    • Pigment production
  • Research Focus: Ongoing research aims to find safer alternatives to chromium-based compounds, especially given the environmental regulations and health risks associated with chromium(VI).
  • Historical Significance: The study of chromium and its compounds dates back to the early 19th century, where it was discovered by the French chemist Nicolas Louis Vauquelin, who identified its remarkable properties and colors.

In summary, disodium dioxido(dioxo)chromium serves as an essential example of how chemistry intertwines with science, industry, and environmental health. Its study not only reveals the intricate nature of chemical reactivity but also emphasizes the need for responsible chemical practices.


Synonyms
SODIUM CHROMATE
7775-11-3
Sodium chromate(VI)
Disodium chromate
Chromium disodium oxide
Chromium sodium oxide
Chromic acid, disodium salt
Chromate of soda
Caswell No. 757
Neutral sodium chromate
12680-48-7
Chromium sodium oxide (CrNa2O4)
Chromiumsodium oxide
CCRIS 883
disodium dioxido(dioxo)chromium
6A49BO6K4M
HSDB 2962
EINECS 231-889-5
EPA Pesticide Chemical Code 068303
Chromic acid (H2CrO4), disodium salt
UNII-6A49BO6K4M
SODIUM CHROMATE [MI]
DTXSID7032056
CHEBI:78671
Chromic acid (H2CrO4), sodium salt (1:2)
EC 231-889-5
CHROMIC ACID (H2CRO4) SODIUM SALT (1:2)
Cromato sodico
Sodium chromic acid
Disodium chromate (Na2(sup 51)CrO4)
Disodium chromate (VI)
Cromato sodico (Spanish)
Disodium chromium tetraoxide
Chromic acid (H2(sup 51)CrO4), disodium salt
SODIUM CHROMATE (VI)
Sodium chromate(VI) decahydrate
DTXCID5012056
Sodium chromate(VI) tetrahydrate
NEUTRAL SODIUM CHROMATE ANHYDROUS
dioxo-2,4-dioxa-3-chroma-1,5-disodapentane
231-889-5
Sodium Chromate, Anhydrous
disodium;dioxido(dioxo)chromium
sodium monochromate
MFCD00003484
NS00081413
Chromic acid (H251CrO4), disodium salt (9CI)
Q407958