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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.
Juu
2 days
Maagizo
1
1
Mix the absorbent
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.
Zana zinazohitajika:
Kabaidi ya kalsiamu
Kloridi ya kalsiamu
Mrija wa Kaure
Tanuru ya Mrija2
2
Drive off volatile matter
Drive off volatile matter
Heat the mixture under reduced pressure first, to drive off anything volatile.
Zana zinazohitajika:
Pampu ya utupuTanuru ya Mrija3
3
Lead air over it at 800 °C
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.
Vifaa kwa hatua hii:
Hewa ya angahewa - Dunia1 as requiredZana zinazohitajika:
Kipima joto kali
AsipiretaTanuru ya Mrija4
4
Burn the traces over hot copper oxide
Burn the traces over hot copper oxide
Lead the gas over hot copper oxide. It burns any hydrogen, hydrocarbons and carbon monoxide.
Zana zinazohitajika:
Oksidi ya shabaMrija wa KaureTanuru ya Mrija5
5
Take out water and carbon dioxide
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.
Zana zinazohitajika:
Chokaa cha soda (kinyonya CO2)
Fosforasi Pentoksaidi
Chupa ya Kuosha Gesi6
6
Collect the argon
Collect the argon
Collect the gas. Expect about 11 litres in two days from 7 kg of carbide. Ours: over water in gas jars.
Zana zinazohitajika:
Birika la Nyumatiki lenye Mitungi ya GesiVifaa
1- 1 as requiredKishikilia Nafasi
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