Barium carbide
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Names | |
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IUPAC name Barium ethynediide | |
Other names Barium acetylide | |
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Properties | |
Chemical formula | BaC2 |
Molar mass | 161.35 g/mol |
Appearance | black crystalline solid |
Density | 3.75 g/cm3 |
Related compounds | |
Other cations | Calcium carbide; Strontium carbide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references |
Barium carbide (also referred to as barium ethynediide or barium acetylide)[1] is a chemical compound in the carbide family having the chemical formula BaC2.[2]
Preparation
Barium carbide can be synthesized as an impure compound by reducing barium carbonate powder with metallic magnesium in the presence of carbon-14.[3] Carbon-14 containing barium carbide can also be made by reducing 14C carbon dioxide with hot barium metal at 600°C.[4] These methods are used because of their high yield, and because the carbide is used to make acetylene. (Carbon-14 is not something to turn into a waste product.) It can also be prepared by heating a barium amalgam and carbon powder mixture in a hydrogen current. The pure compound is prepared by reducing barium oxide with carbon at high temperature.[5]
Properties
Barium carbide reacts similarly to calcium carbide,[6] but it's more fusible. When exposed to extreme heat, the barium will evaporate leaving behind crystals of graphite. It can also absorb the carbon in a solution at high temperature.[5]
Hazards
Barium carbide can cause damage to the GI tract and irritation in the skin and eyes.[1]
References
- ^ a b "Barium acetylide | C2Ba | ChemSpider". chemspider.com. Retrieved 2019-12-17.
- ^ "Barium Carbide". American Elements. Retrieved 2019-12-11.
- ^ Mishin, V. I.; Georgievskij, S. S.; Eksel', L. M.; Koval', A. I.; Afanas'eva, L. A.; Puchkov, L. D.; Ulybin, V. B. (1989-12-07). "Method for preparation of barium carbide labelled by carbon 14" (in Russian).
- ^ Arrol, W. J.; Glascock, R. (1948). "308. The conversion of carbon dioxide into acetylene on the scale of 2—20 micromoles". J. Chem. Soc. 3: 1534–1537. doi:10.1039/JR9480001534. PMID 18101450.
- ^ a b "Barium Carbide, BaC2". barium.atomistry.com. Retrieved 2019-12-11.
- ^ "Carbide". InfoPlease. Retrieved 2019-12-11.
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CH4 +H | He | ||||||||||||||||||||
Li4C Li2C2 | Be2C | B4C BnCm +B | C C2 C4− | CN− (CN)2 +N | CO CO2 C3O2 | CF CF4 | Ne | ||||||||||||||
Na2C2 | Mg2C | Al4C3 | SiC +Si | +P | CS2 +S | CCl4 +Cl | Ar | ||||||||||||||
K2C2 | CaC CaC2 | ScC Sc3C4 Sc4C3 Sc15C19 | TiC | VC | Cr3C2 | MnC2 | Fe2C Fe3C Fe5C2 | CoC | Ni2C | CuC CuC2 | Zn2C | Ga | +Ge | +As | CSe2 | CBr4 +Br | Kr | ||||
Rb2C2 | SrC2 | YC | ZrC | NbC | MoC Mo2C | Tc | Ru2C | Rh2C | PdC2 | Ag2C2 | CdC | InC | Sn | Sb | Te | CI4 +I | Xe | ||||
Cs2C2 | BaC2 | * | LuC2 | HfC | TaC TaC5 | WC | Re2C | Os2C | Ir2C | PtC | Au2C2 | Hg2C2 | TlC | ?PbC | Bi | Po | At | Rn | |||
Fr | Ra | ** | Lr | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Nh | Fl | Mc | Lv | Ts | Og | |||
* | LaC2 | CeC2 | PrC2 | NdC2 | PmC2 | SmC2 | EuC2 | GdC2 | TbC2 | DyC2 | HoC2 | ErC2 | TmC2 | YbC2 | |||||||
** | Ac | ThC ThC2 | PaC | UC | NpC | PuC Pu2C3 | Am | Cm | Bk | Cf | Es | Fm | Md | No |