Calcium carbonate
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| Calcium carbonate | |
|---|---|
| |
| General | |
| Systematic name | Calcium carbonate |
| Other names | Limestone calcite aragonite chalk marble |
| Molecular formula | CaCO3 |
| SMILES | |
| Molar mass | 100.087 g/mol |
| Appearance | White powder. |
| CAS number | [471-34-1] |
| Properties | |
| Density and phase | 2.83 g/cm3, solid. |
| Solubility in water | ? g/100 ml (?°C) |
| Melting point | 825°C (1098 K) |
| Boiling point | Decomposes |
| Acidity (pKa) | ? |
| Basicity (pKb) | ? |
| Chiral rotation [α]D | ?° |
| Viscosity | ? cP at ?°C |
| Structure | |
| Molecular shape | Linear |
| Coordination geometry | Tetrahedral |
| Crystal structure | ? |
| Dipole moment | ? D |
| Hazards | |
| MSDS | MSDS Data |
| Main hazards | Not hazardous |
| NFPA 704 |
0
0
0
|
| Flash point | ?°C |
| R/S statement | R: ? S: ? |
| RTECS number | ? |
| Supplementary data page | |
| Structure and properties | n, εr, etc. |
| Thermodynamic data | Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Related compounds | |
| Other anions | ? |
| Other cations | ? |
| Related ? | ? |
| Related compounds | ? |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Disclaimer and references | |
Calcium carbonate is one of most common compounds on the earth, and the main component of sea shells. Sedimentary rocks made from this compound have been historically used as building materials since the time of ancient Egypt. It was also traditionally used as classroom chalk.
Calcium carbonate is used medicinally as a calcium supplement or as an antacid. Many of soy milk products include calcium carbonate. Also it reacts with water that is saturated with carbon dioxide, so it forms large caverns underground.
Contents |
Properties
Because this calcium carbonate has carbonate in the formula, it shares properties of carbonate, making it very reactive with water. One of the properties is that this compound reacts with strong acid. Also, it reacts with water that is saturated with carbon dioxide, this reaction makes the big caverns under the ground.
Occurrences
Calcium carbonate chemically bonds together particulates to form a sedimentary rock known as limestone, which can be found almost everywhere. It is one of the most common minerals on earth.
They can be found in rocks and seashells. It is found in fossil remains, shale, slate, chalk, travertine, and marble. Eggshells are made of almost 95% calcium carbonate. More than 4% of earth's crust is comprised of it. Also, because it strongly reacts with acid, it can be used to find whether the rocks and seashells have calcium carbonate or not. When they react, the reactants (calcium carbonate) fizz and produce carbon dioxide and water.
Uses
Two hundred tons of Calcium carbonate is used around the world every year in applications ranging from medicine to agriculture. It is commonly referred to as chalk because it has historically been used for chalk on chalkboards, although the mineral gypsum is more commonly used today. Calcium carbonate also used widely as a filler in adhesives, and sealants.
Gallery
 Calcite is made of calcium carbonate |
 Chalk |
Related References
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