Halide
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In
alkali metals combine directly with halogens under appropriate conditions forming halides of the general formula, MX (X = F, Cl, Br or I). Many salts are halides; the hal- syllable in halide and halite reflects this correlation. All Group 1 metals form halides that are white solids at room temperature.[citation needed
]
A halide ion is a halogen atom bearing a negative charge. The halide
astatide (At−).[clarification needed] Such ions are present in all ionic halide salts. Halide minerals
contain halides.
All these halides are colourless, high melting crystalline solids having high negative enthalpies of formation.
Tests
Halide compounds such as
precipitate
, with varying colour depending on the halogen:
For organic compounds containing halides, the Beilstein test is used.
Uses
colour rendition than orange high-pressure sodium lamps. Metal halide lamps are also commonly used in greenhouses or in rainy climates to supplement natural sunlight
.
Silver halides are used in photographic films and papers. When the film is developed, the silver halides which have been exposed to light are reduced to metallic silver, forming an image.
Halides are also used in solder paste, commonly as a Cl or Br equivalent.[3]
Synthetic
organohalide
compounds.
Compounds
Examples of halide compounds are:
- Sodium chloride (NaCl)
- Potassium chloride (KCl)
- Potassium iodide (KI)
- Lithium chloride (LiCl)
- Copper(II) chloride (CuCl2)
- Silver chloride (AgCl)
- Calcium chloride (CaCl2)
- Chlorine fluoride (ClF)
- Organohalides
- Bromomethane (CH3Br)
- Iodoform (CHI3)
- Hydrogen chloride (HCl)
- Hydrogen bromide (HBr)
Silicon
See also
- Salinity
- Organohalide
- Hydrogen halide
- Silver halide
References
- ^ "Definition of HALOGENIDE". www.merriam-webster.com. Retrieved 2022-01-07.
- ^ AgF can solve in water.
- ^ "Halogen-Free Solder Paste" (PDF). Archived from the original (PDF) on 2012-03-17. Retrieved 2011-03-21.
