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Barium: Barium Oxide Heated with Aluminium at 1200 °C in Vacuum (Guntz, Thorpe 1912)
Charlie

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Charlie

1. Nobyembre 2026DE
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Barium: Barium Oxide Heated with Aluminium at 1200 °C in Vacuum (Guntz, Thorpe 1912)

Aluminium pulls the oxygen from barium oxide at 1200 °C. In a vacuum the freed barium boils off and condenses as metal in the cool end of the tube. Result: silver-white barium, up to 98.8 % pure. It burns easily in air; Thorpe keeps barium in dry carbon dioxide. Source: Thorpe, Dictionary of Applied Chemistry vol. 1 (1912), p. 418, after Guntz. Not given: the tube, amounts and time. Picture drawn by Youblob.
Abantado
1 day

Mga Tagubilin

1

Mix oxide with one-tenth aluminium

Weigh barium oxide and mix it with one-tenth of its weight of aluminium. Ours: aluminium powder.

Mga materyales para sa hakbang na ito:

Barium oxideBarium oxide1 as required

Mga kailangang kasangkapan:

Pulbos na AluminyoPulbos na Aluminyo
Tumpak na Digital na TimbanganTumpak na Digital na Timbangan
Batong Almires at PanghaloBatong Almires at Panghalo
2

Heat to 1200 °C in vacuum

Heat the mixture to 1200 °C in an evacuated tube. Ours: a porcelain tube in a tube furnace on a vacuum pump. Barium vapour attacks glass; in his other method Guntz lines the tube with nickel foil.

Mga kailangang kasangkapan:

Tubong PorselanaTubong Porselana
Hurnong TuboHurnong Tubo
PirometroPirometro
Bombang panghigop ng hanginBombang panghigop ng hangin
3

Collect the metal from the cool end

The barium condenses in the cooler part of the tube. Take it out and keep it in dry carbon dioxide; it oxidises fast in air.

Mga kailangang kasangkapan:

Tubong PorselanaTubong Porselana

Mga Materyales

1
  • 1
    Barium oxide
    1 as required
    Placeholder

Mga Kinakailangang Kasangkapan

7

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Barium

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