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Ammonium dichromate

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Identification
Molecular formula
(NH4)2Cr2O7
CAS number
7789-09-5
IUPAC name
diammonium;dioxido(dioxo)chromium
State
State

At room temperature, ammonium dichromate is a stable solid. It is well-known for its use in laboratory settings where its decomposing reaction can be used to demonstrate volcanic eruptions due to the smoky green chromium(III) oxide produced when it decomposes.

Melting point (Celsius)
180.00
Melting point (Kelvin)
453.15
Boiling point (Celsius)
180.00
Boiling point (Kelvin)
453.15
General information
Molecular weight
252.06g/mol
Molar mass
252.0640g/mol
Density
2.1150g/cm3
Appearence

Ammonium dichromate appears as an orange-red crystalline solid. It is typically available in its powdery form and has a crystalline appearance. Due to its vibrant color, it is a distinctive compound, often used for dramatic demonstration reactions in educational settings.

Comment on solubility

Solubility of Diammonium Dioxido(dioxo)chromium

The solubility of diammonium dioxido(dioxo)chromium can be characterized by several important points that highlight its behavior in various solvents. Typically, compounds containing ammonium ions demonstrate a degree of solubility in water. Here are some key aspects:

  • Water Solubility: Due to the presence of the diammonium ion, this compound is likely to be soluble in water. Ammonium compounds tend to interact favorably with water molecules, facilitating dissolution.
  • pH Influence: The solubility can be significantly affected by the pH of the solution, as the presence of hydroxide ions might precipitate certain chromium species.
  • Temperature Dependency: Like many inorganic compounds, the solubility of diammonium dioxido(dioxo)chromium may increase with temperature, so it is often more soluble at elevated temperatures.
  • Solvent Considerations: While water is a primary solvent, solubility may vary in organic solvents, depending on polarity and other factors.

In summary, while the solubility of diammonium dioxido(dioxo)chromium in water is promising due to the ammonium component, it is always important to consider the environmental conditions and the specific interactions of the ions within the solution.

Interesting facts

Interesting Facts about Diammonium Dioxido(dioxo)chromium

Diammonium dioxido(dioxo)chromium is a fascinating compound with a range of applications and intriguing characteristics. Here are some notable points to consider:

  • Dual Purpose: This compound is commonly used in fertilizers, as the ammonium components provide essential nitrogen for plant growth.
  • Chromium's Role: The dioxido(dioxo)chromium part signifies that chromium exhibits a +6 oxidation state, which is significant for its reactivity and use in various industrial processes.
  • Environmental Considerations: While chromium is important for many applications, compounds of chromium in higher oxidation states can pose environmental and health risks, making proper handling essential.
  • Color and Optics: Compounds of chromium are known for their vibrant colors, making them valuable in ceramics and pigments.
  • Research Applications: Researchers study this compound not only for its agricultural uses but also for its potential roles in catalysis and material science.

In summary, diammonium dioxido(dioxo)chromium is a compound that balances agricultural utility with significant implications for industrial chemistry. Its diverse applications highlight the importance of understanding and safely managing such compounds in various fields.

Synonyms
AMMONIUM CHROMATE
Diammonium chromate
Neutral ammonium chromate
Chromic acid, diammonium salt
Ammonium chromate(VI)
X7I33TTT6D
HSDB 482
EINECS 232-138-4
Chromic acid ammonium salt
UNII-X7I33TTT6D
Chromic acid (H2CrO4), diammonium salt
DTXSID3064857
Chromic acid (H2CrO4), ammonium salt (1:2)
AMMONIUM CHROMATE(VI) [MI]
DIAMMONIUM CHROMATE ((NH4)2CRO4
Cromato amonico
Ammonium chromic acid
Cromato amonico (Spanish)
chromic acid diammonium salt
(NH4)2CrO4
DTXCID9048061
diammonium dioxochromiumbis(olate)
DIAMMONIUM CHROMATE ((NH4)2CRO4)
232-138-4
7788-98-9
7788-98-952110-72-2
un3087
Ammonium chromium oxide
52110-72-2
Chromic acid,ammonium salt
diazanium;dioxido(dioxo)chromium
Ammonium chromate ((NH4)2CrO4)
AKOS016373628
(NH4)2CrO4, Chromic acid diammonium salt
Q411671