Difference between revisions of "Barium sulfate"
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===Chemical=== | ===Chemical=== | ||
| + | Barium sulfate isn't terribly reactive, but there is a way of converting it to other barium salts. The trick is that barium carbonate is even less soluble than barium sulfate, and sulfate can be converted to carbonate by lengthy boiling in a solution of sodium carbonate. This should be done under reflux, to prevent the solution in the pot from drying. | ||
===Physical=== | ===Physical=== | ||
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==Preparation== | ==Preparation== | ||
| − | + | Barium sulfate can be easily prepared by reacting any soluble barium salt with sulfuric acid or a sulfate. | |
==Projects== | ==Projects== | ||
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*Green flame in some pyrotechnics | *Green flame in some pyrotechnics | ||
*Paper brightener | *Paper brightener | ||
| + | *Making barium carbonate | ||
==Handling== | ==Handling== | ||
Latest revision as of 21:36, 10 August 2023
 Barium sulfate from a pharmacy
| |
| Names | |
|---|---|
| IUPAC name
Barium sulfate
| |
| Other names
Barium sulphate
| |
| Identifiers | |
| Jmol-3D images | Image |
| |
| Properties | |
| BaSO4 | |
| Molar mass | 233.43 g/mol |
| Appearance | White solid |
| Odor | Odorless |
| Density | 4.49 g/cm3 |
| Melting point | 1,580 °C (2,880 °F; 1,850 K) |
| Boiling point | 1,600 °C (2,910 °F; 1,870 K) (decomposes) |
| 0.0002448 g/100 mL (20 °C) 0.000285 g/100 mL (30 °C) | |
| Solubility | Soluble in concentrated sulfuric acid Insoluble in acetone, chloroform, ethanol, toluene |
| Thermochemistry | |
| Std molar
entropy (S |
132 J·mol−1·K−1 |
| Std enthalpy of
formation (ΔfH |
−1465 kJ·mol−1 |
| Hazards | |
| Safety data sheet | ScienceLab |
| Flash point | Non-flammable |
| Related compounds | |
| Related compounds
|
Magnesium sulfate Calcium sulfate Strontium sulfate |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Barium sulfate or barium sulphate is an insoluble salt of barium, with a variety of applications. It has the chemical formula BaSO4.
Contents
Properties
Chemical
Barium sulfate isn't terribly reactive, but there is a way of converting it to other barium salts. The trick is that barium carbonate is even less soluble than barium sulfate, and sulfate can be converted to carbonate by lengthy boiling in a solution of sodium carbonate. This should be done under reflux, to prevent the solution in the pot from drying.
Physical
Barium sulfate is a dense white solid, insoluble in water.
Availability
Barium sulfate can be purchased from many pharmacies.
Preparation
Barium sulfate can be easily prepared by reacting any soluble barium salt with sulfuric acid or a sulfate.
Projects
- Make white pigment
- Green flame in some pyrotechnics
- Paper brightener
- Making barium carbonate
Handling
Safety
Although soluble salts of barium are toxic to humans, barium sulfate is nontoxic due to its insolubility. This allows it to be used safely in X-ray investigations.
Storage
Barium sulfate should be stored in closed bottles.
Disposal
Due to its low toxicity, barium sulfate doesn't require special disposal.
References
Relevant Sciencemadness threads
- Chemical pages without CAS Registry Number
- Articles without EBI source
- Chemical pages without ChemSpiderID
- Chemical pages without DrugBank identifier
- Articles without KEGG source
- Articles without InChI source
- Articles without UNII source
- Articles containing unverified chemical infoboxes
- Chemical compounds
- Inorganic compounds
- Barium compounds
- Sulfates
- Insoluble compounds
- Easily prepared chemicals
- Readily available chemicals
