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Oxygen: Manganese Dioxide Heated to Bright Redness in an Iron Bottle
Oxygen from pyrolusite, as Thorpe's Dictionary (1913) gives it: heated to a bright-red heat, manganese dioxide gives up a third of its oxygen. Glass will not stand the heat, so it is heated in an iron bottle in a furnace. Pure dioxide yields 12.3 parts of oxygen per 100; pyrolusite, about 70 % dioxide, gives less.
The picture: our diagram.
Intermediate
1 day
Instructions
1
1
Heat in an iron bottle to bright redness
Heat in an iron bottle to bright redness
Put manganese dioxide in an iron bottle and heat it in a furnace to a bright-red heat. 100 parts of pure dioxide give 12.3 parts of oxygen. Ours: a forge as the furnace.
Materials for this step:
Manganese Dioxide (Pyrolusite)100 partsTools needed:
Wrought-Iron Gas Bottle
Blacksmith Forge
Heat-Resistant Gloves
Balance Scale2
2
Collect the gas over water
Collect the gas over water
Ours: lead the gas through a delivery tube into gas jars standing full of water in a pneumatic trough.
Tools needed:
Glass Delivery Tube
Pneumatic Trough with Gas Jars
WaterMaterials
1- 100 partsPlaceholder
Tools Required
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