Silver(I) chromate
Silver(I) chromate is an inorganic compound with formula Ag2CrO4.
- 1Names
- 2Formulae and structures
- 3Properties
- 4Constituents
- 5Thermodynamic properties
- 6Solubility
- 7Hazards
- 8Preparations
- 9Chemical reactions
- 10References
- 11Related substances
- 12Related categories
Names
List of substance names
- Typical name
- Silver(I) chromate
- Compositional nomenclature
- Silver(I) chromate
- Disilver chromate
- Additive nomenclature
- Silver(1+) tetraoxidochromate(2−)
Formulae and structures
List of formulae
- Typical formula
- Ag2CrO4
- Compositional formula
- Ag2CrO4
- Structural formula
- Other structural formulas
- Lewis structure
- Colored Lewis structure
Properties
List of substance properties
- Name
- Silver(I) chromate
- Formula
- Ag2CrO4
- Appearance
- Red brown solid
- Odor
- Odorless
- Molar mass
- 331.729 g/mol
- Density
- 5.625 g/cm3[1]Solid, 25°C
- Melting point
- –
- Boiling point
- –
Constituents
Constituent ions
| Ion | Name | Charge number | Number |
|---|---|---|---|
| Ag+ | Silver(I) ion | 1 | 2 |
| CrO42− | Chromate ion | -2 | 1 |
Constituent atoms
| Atom | Name | Oxidation state | Number |
|---|---|---|---|
| Ag | Silver | +1 | 2 |
| Cr | Chromium | +6 | 1 |
| O | Oxygen | −2 | 4 |
Ratio of atoms
| Atom | Atomic weight | Number | Atomic ratio | Weight ratio |
|---|---|---|---|---|
| Ag | 107.8682 | 2 | 28.57% | 65.03% |
| Cr | 51.9961 | 1 | 14.29% | 15.67% |
| O | 15.999 | 4 | 57.14% | 19.29% |
Thermodynamic properties
Phase transition properties
- Enthalpy of fusion
- –
- Enthalpy of vaporization
- –
- Enthalpy of vaporization at 25°C
- –
- Enthalpy of other transition
- –
Standard thermodynamic properties
State | Standard enthalpy of formation ΔfH° kJ · mol−1 | Standard Gibbs energy of formation ΔfG° kJ · mol−1 | Standard molar entropy S° J · K−1 · mol−1 | Standard molar heat capacity at constant pressure Cp° J · K−1 · mol−1 |
|---|---|---|---|---|
| Crystalline solid | −731.74[2] | −641.76[2] | 217.6[2] | 142.26[2] |
| Ionized aqueous solution | −669.98[2] | −573.52[2] | 195.8[2] | – |
Solubility
Qualitative solubility
Solubility in water (g/100 mL)[3]
| 18°C | 25°C |
|---|---|
| 0.0026 | 0.002 |
Solubility in water (g/100 mL)[3]
| 25°C |
|---|
| 0.0029 |
Solubility in water (g/100 mL)[3]
| 0.26°C | 14.8°C | 30.7°C | 75°C |
|---|---|---|---|
| 0.00142 | 0.00225 | 0.0036 | 0.0084 |
Solubility in water (g/100 mL)[3]
| 18°C | 27°C | 50°C |
|---|---|---|
| 0.00256 | 0.00341 | 0.00534 |
Solubility curve (g/100 mL)
Hazards
GHS label[4]
- Hazard pictograms
- Signal word
- Danger
- Hazard statements
- H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled
- H317: May cause an allergic skin reaction
- H350: May cause cancer
- H370: Causes damage to organs
- H370: Causes damage to kidney
- H370: Causes damage to digestive system
- H335: May cause respiratory irritation
- H372: Causes damage to organs through prolonged or repeated exposure
- H372: Causes damage to kidney through prolonged or repeated exposure
- H372: Causes damage to respiratory system through prolonged or repeated exposure
Physical hazards[4]
Health hazards[4]
Environmental hazards[4]
| Classification | Category | Label | Hazard statement |
|---|---|---|---|
| Hazardous to the aquatic environment short term | Classification not possible | ||
| Hazardous to the aquatic environment long term | Classification not possible | ||
| Hazardous to the ozone layer | No data |
Preparations
Reaction of basic oxide and acid
The reaction of basic oxide and acid can yield silver(I) chromate.
Reaction of basic oxide and acidic oxide
The reaction of silver(I) oxide and chromium(VI) oxide yields silver(I) chromate.
Precipitation reaction
When silver(I) ion and chromate ion react in aqueous solution, a precipitate of silver(I) chromate is formed.
Chemical reactions
Electrolytic dissociation
Electrolytic dissociation of silver(I) chromate yields silver(I) ion and chromate ion.
Reaction with strong acid
The reaction of silver(I) chromate and strong acid yields salt of strong acid and chromic acid.
Reaction with reducing species
The reaction of reducing species and silver(I) chromate yields a variety of products.
Reaction with oxidizable species
The reaction of oxidizable species and silver(I) chromate yields a variety of products.
Reaction with oxidizable species under acidic condition
The reaction of oxidizable species, silver(I) chromate, and hydrogen ion yields a variety of products.
Reaction with oxidizable species under neutral condition
The reaction of oxidizable species, silver(I) chromate, and water yields a variety of products.
Reaction with hardly oxidizable species
The reaction of hardly oxidizable species and silver(I) chromate yields a variety of products.
Reaction with hardly oxidizable species under acidic condition
The reaction of hardly oxidizable species, silver(I) chromate, and hydrogen ion yields a variety of products.
Reaction with hardly oxidizable species under neutral condition
The reaction of hardly oxidizable species, silver(I) chromate, and water yields a variety of products.
Decomposition
Decomposition of silver(I) chromate yields silver(I) oxide and chromium(VI) oxide.
References
List of references
- 1James G. Speight (2017)Lange's Handbook of Chemistry, 17th editionMcGraw Hill Education
- 2Janiel J. Reed (1989)The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI UnitsNational Institute of Standards and Technology (NIST)
- 3Atherton Seidell (1919)Solubilities of Inorganic and Organic Compounds: A Compilation of Quantitative Solubility Data From the Periodical LiteratureD. Van Nostrand Company
- 4Chemical Management CenterGHS Classification ResultsNational Institute of Technology and Evaluation
