Difference between revisions of "Potassium bifluoride"
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==References== | ==References== | ||
*[https://www.sciencemadness.org/whisper/viewthread.php?tid=16246&page=3#pid699384] | *[https://www.sciencemadness.org/whisper/viewthread.php?tid=16246&page=3#pid699384] | ||
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[[Category:Chemical compounds]] | [[Category:Chemical compounds]] | ||
[[Category:Inorganic compounds]] | [[Category:Inorganic compounds]] | ||
[[Category:Potassium compounds]] | [[Category:Potassium compounds]] | ||
[[Category:bifluorides]] | [[Category:bifluorides]] | ||
Revision as of 22:08, 16 August 2025
| Names | |
|---|---|
| IUPAC name
Potassium hydrogen difluoride
| |
| Properties | |
| K[HF2] | |
| Molar mass | 78.103 g/mol |
| Appearance | White crystalline solid |
| Odor | Slightly acidic |
| Density | 2.37 g/cm3 |
| Melting point | 238.7 °C (461.7 °F; 511.8 K) |
| 39.2 g/100 ml (20 °C) | |
| Solubility | Soluble in ethanol |
| Vapor pressure | ~0 mmHg |
| Hazards | |
| Flash point | Non-flammable |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Potassium bifluoride is a salt with the formula K[HF2]. It is a white crystalline solid, it is hygroscopic in nature, and has slight acidic odour to it.
Contents
Properties
Potassium bifluoride (KHF₂) is a white, crystalline solid that is highly soluble in water. It has a melting point of 238.7°C and decomposes before boiling. It is mildly acidic in solution due to the release of hydrofluoric acid.
Availability
Potassium bifluoride can be purchased from glass Manufacturers and chemical companies.
Preparation
Reaction of concentrated Hydrofluoric acid (about 40-50% concentrated) with Potassium hydroxide yields Potassium bifluoride.
Projects
- Make elemental Fluorine
- Etching glass
Handling
Safety
Potassium bifluoride should be handled carefully with gloves and a suitable respirator as this substance is quite irritating to the nose and the skin. If ingested fluoride ions can become quite poisonous. Potassium bifluoride should not be heated above its melting point as this may lead to decomposition of the salt and formation of highly corrosive Hydrogen fluoride gas and Potassium fluoride.
Storage
Potassium bifluoride should be stored in an airtight container (preferably a desiccator) since its hygroscopic.
Disposal
Potassium bifluoride should not be poured down the drain because fluoride ions are quite toxic to the environment. It can be recycled for fluoride ions or should be given to a specific authority for its safe disposal.
