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Argon: Air Led over Calcium Carbide and Calcium Chloride at 800 °C (Fischer and Ringe, Thorpe 1912)
Charlie

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Charlie

1. Nobyembre 2026DE
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Argon: Air Led over Calcium Carbide and Calcium Chloride at 800 °C (Fischer and Ringe, Thorpe 1912)

Air is nearly 1 % argon. Red-hot calcium carbide with a little calcium chloride swallows both the oxygen and the nitrogen; argon, which combines with nothing, passes straight through. Result: about 11 litres of argon from 7 kg of carbide in two days. It still holds traces of neon, krypton and xenon (0.25 %, mostly neon). Source: Thorpe, Dictionary of Applied Chemistry vol. 1 (1912), p. 291, after Fischer and Ringe (Ber. 41, 2017). Not given: the vessel, the air volume, and how the water and carbon dioxide are taken out. Picture drawn by Youblob.
Abantado
2 days

Mga Tagubilin

1

Mix the absorbent

Mix calcium carbide (90 %) with calcium chloride (10 %): 7 kg carbide takes about 0.78 kg chloride (our arithmetic). Fill a tube with it. Ours: a porcelain tube in a tube furnace.

Mga kailangang kasangkapan:

Carbide ng kaltsiyoCarbide ng kaltsiyo
Calcium chlorideCalcium chloride
Tubong PorselanaTubong Porselana
Hurnong TuboHurnong Tubo
2

Drive off volatile matter

Heat the mixture under reduced pressure first, to drive off anything volatile.

Mga kailangang kasangkapan:

Bombang panghigop ng hanginBombang panghigop ng hangin
Hurnong TuboHurnong Tubo
3

Lead air over it at 800 °C

Hold the mixture at 800 °C and lead air over it slowly. The oxygen and nitrogen are taken up; what comes out is mostly argon. Ours: draw the air through with an aspirator.

Mga materyales para sa hakbang na ito:

Hangin ng atmospera - DaigdigHangin ng atmospera - Daigdig1 as required

Mga kailangang kasangkapan:

PirometroPirometro
AspiratorAspirator
Hurnong TuboHurnong Tubo
4

Burn the traces over hot copper oxide

Lead the gas over hot copper oxide. It burns any hydrogen, hydrocarbons and carbon monoxide.

Mga kailangang kasangkapan:

Copper OxideCopper Oxide
Tubong PorselanaTubong Porselana
Hurnong TuboHurnong Tubo
5

Take out water and carbon dioxide

Remove the water vapour and carbon dioxide. Ours: soda lime for the carbon dioxide, then phosphorus pentoxide for the water.

Mga kailangang kasangkapan:

Apog na may soda (sumisipsip ng CO2)Apog na may soda (sumisipsip ng CO2)
Phosphorus PentoxidePhosphorus Pentoxide
Botelyang Panghugas ng GasBotelyang Panghugas ng Gas
6

Collect the argon

Collect the gas. Expect about 11 litres in two days from 7 kg of carbide. Ours: over water in gas jars.

Mga kailangang kasangkapan:

Pneumatic Trough na may mga Gas JarPneumatic Trough na may mga Gas Jar

Mga Materyales

1

Mga Kinakailangang Kasangkapan

12

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Argon

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Calcium Carbide: Lime and Coke Fused in the Electric Furnace
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Calcium Carbide: Lime and Coke Fused in the Electric Furnace

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Copper(II) Oxide by Heating Copper in Air

Copper(II) Oxide by Heating Copper in Air

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