- Carbonate of potash redirects here. For one of potassium carbonate's impure forms, see potash. Potash (or carbonate of potash) is an impure form of Potassium carbonate ( K 2 CO3)
| Potassium carbonate | |
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| IUPAC name | Potassium carbonate |
| Other names | Potash, pearlash |
| Identifiers | |
| CAS number | [584-08-7] |
| RTECS number | TS7750000 |
| Properties | |
| Molecular formula | K2CO3 |
| Molar mass | 138. IUPAC Nomenclature is a system of naming Chemical compounds and of describing the science of Chemistry in general CAS registry numbers are unique numerical identifiers for Chemical compounds Polymers biological sequences mixtures and Alloys They are also referred to Registry of Toxic Effects of Chemical Substances ( RTECS) is a Database of Toxicity information compiled from the open scientific literature without reference A chemical formula is a way of expressing information about the Atoms that constitute a particular Chemical compound, and how the relationship between those atoms changes Molar mass, symbol M, is the Mass of one mole of a substance ( Chemical element or Chemical compound) 2055 g/mol |
| Appearance | White deliquescent solid |
| Density | 2. The density of a material is defined as its Mass per unit Volume: \rho = \frac{m}{V} Different materials usually have different 29 g/cm3, solid |
| Melting point |
891 °C |
| Boiling point |
Decomposes |
| Solubility in water | 112 g/100 mL (20 °C) |
| Hazards | |
| NFPA 704 |
 0
2
0
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| Flash point | Not flammable |
| Related compounds | |
| Other cations | Lithium carbonate, sodium carbonate, caesium carbonate |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Potassium carbonate is a white salt, soluble in water (insoluble in alcohol), which forms a strongly alkaline solution. The melting point of a solid is the temperature range at which it changes state from solid to Liquid. The boiling point of a liquid is the temperature at which the Vapor pressure of the liquid equals the environmental pressure surrounding the liquid Solubility is the characteristic Physical property referring to the ability of a given substance the Solute, to dissolve in a Solvent. Water is a common Chemical substance that is essential for the survival of all known forms of Life. Symbolism The four divisions are typically color-coded with blue indicating level of Health Hazard, red indicating The flash point of a flammable liquid is the lowest Temperature at which it can form an ignitable mixture in air An ion is an Atom or Molecule which has lost or gained one or more Valence electrons giving it a positive or negative electrical charge Lithium carbonate is a Chemical compound with the formula Li2CO3 Sodium carbonate (also known as washing soda or soda ash), is a Sodium Salt of Carbonic acid. In Chemistry, the standard state of a material is its state at 1 bar (100 Kilopascals exactly Solubility is the characteristic Physical property referring to the ability of a given substance the Solute, to dissolve in a Solvent. Water is a common Chemical substance that is essential for the survival of all known forms of Life. In Chemistry, an alcohol is any Organic compound in which a Hydroxyl group ( - O[[hydrogen H]]) is bound to a Carbon In Chemistry, an alkali (from Arabic: Al-Qaly القلي القالي) is a basic, ionic salt of an Alkali metal It can be made as the product of potassium hydroxide's absorbent reaction with carbon dioxide. Potassium hydroxide is the Inorganic compound with the formula K[[hydroxide OH]] Carbon dioxide ( Chemical formula:) is a Chemical compound composed of two Oxygen Atoms covalently bonded to a single It is deliquescent, often appearing a damp or wet solid. Hygroscopy is the ability of a substance to attract Water Molecules from the surrounding environment through either absorption or Adsorption A solid' object is in the States of matter characterized by resistance to Deformation and changes of Volume. Potassium carbonate is used in the production of soap and glass. SOAP (see below for name and origins is a protocol for exchanging XML -based messages over Computer networks normally using Glass in the common sense refers to a Hard, Brittle, transparent Solid, such as that used for Windows many
Contents |
History
Potassium carbonate was first identified in 1742 by Antonio Campanella and is the primary component of potash and the more refined pearlash or salts of tartar. Potash (or carbonate of potash) is an impure form of Potassium carbonate ( K 2 CO3) Historically pearlash was created by baking potash in a kiln to remove impurities. Potash (or carbonate of potash) is an impure form of Potassium carbonate ( K 2 CO3) Kilns are thermally insulated chambers or Ovens in which controlled temperature regimes are produced The fine white powder remaining was the pearlash. The first patent issued by the U.S. Patent Office was awarded to Samuel Hopkins in 1790 for an improved method of making potash and pearlash. A patent is a set of Exclusive rights granted by a State to an inventor or his assignee for a fixed period of time in exchange for a disclosure of an The United States Patent and Trademark Office ( PTO or USPTO) is an agency in the United States Department of Commerce that issues Patents to Samuel Hopkins ( December 9, 1743 – 1818) was an American Inventor from Philadelphia Pennsylvania. Year 1790 ( MDCCXC) was a Common year starting on Friday (link will display the full calendar of the Gregorian calendar (or a Common year
In late 18th century North America, before the development of baking powder, pearlash began to be used as a leavening agent in "quick breads". The 18th century lasted from 1701 to 1800 in the Gregorian calendar, in accordance with the Anno Domini / Common Era numbering system Baking powder is a dry chemical Leavening agent used in cooking mainly baking A leavening agent (sometimes called just leavening or leaven) is a substance used in Doughs and batters that causes a foaming action intended Bread is a Staple food prepared by Baking a Dough of Flour and Water.
Other terms for potassium carbonate:
- Carbonate of potash
- Dipotassium carbonate
- Dipotassium salt
- Pearl ash
- Potash
- Salt of tartar
- Salt of wormwood
Production
Today potassium carbonate is prepared commercially by the electrolysis of potassium chloride. Potash (or carbonate of potash) is an impure form of Potassium carbonate ( K 2 CO3) In chemistry and manufacturing electrolysis is a method of separating chemically bonded elements and compounds by passing an Electric current The Chemical compound potassium chloride (KCl is a Metal Halide salt composed of Potassium and Chlorine. The resulting potassium hydroxide is then carbonated using carbon dioxide to form potassium carbonate, which is often used to produce other potassium compounds. Potassium hydroxide is the Inorganic compound with the formula K[[hydroxide OH]] Carbon dioxide ( Chemical formula:) is a Chemical compound composed of two Oxygen Atoms covalently bonded to a single
- 2KOH + CO2 → K2CO3 + H2O
Applications
Pearlash has been used for soap, glass, and china production. SOAP (see below for name and origins is a protocol for exchanging XML -based messages over Computer networks normally using Glass in the common sense refers to a Hard, Brittle, transparent Solid, such as that used for Windows many
In the laboratory, it may be used as a mild drying agent where other drying agents such as calcium chloride may be incompatible. A Desiccant is a Hygroscopic substance that induces or sustains a state of dryness ( Desiccation) in its local vicinity in a moderately-well sealed container Calcium chloride (CaCl2 is an ionic compound of Calcium and Chlorine. However, it is not suitable for acidic compounds.
Mixed with water it causes an exothermic reaction that results in a temperature change, producing heat. An exothermic reaction is a Chemical reaction that releases Heat.
In cuisine, it is used as an ingredient in the production of grass jelly, a food consumed in Chinese and Southeast Asian cuisines. Grass jelly, or Leaf jelly, is a Jelly-like dessert found in China, Taiwan and Southeast Asia.
Potassium carbonate is being used as the electrolyte in many cold fusion experiments. An electrolyte is any substance containing free Ions that behaves as an electrically conductive medium Cold fusion, sometimes called low energy nuclear reactions (LENR or condensed matter nuclear science, is a set of effects reported in controversial laboratory experiments
Potassium carbonate is sometimes used as a buffering agent in the production of mead or wine. For an aqueous solution composed of both a weak acid or base and its conjugate see Buffer solution. Mead (ˈmiːd is a fermented Alcoholic beverage made of Honey, Water, and Yeast. Wine is an Alcoholic beverage made from the fermentation of Grape juice
Aqueous potassium carbonate is also used as a fire suppressant in extinguishing deep fat fryers and various other B class related fires.
References
A Dictionary of Science, Oxford University Press Inc., New York 2003
External links
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