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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.
中级
1 day
说明
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.
此步骤所需材料：
二氧化锰（软锰矿）100 parts所需工具：
锻铁气瓶
铁匠炉
耐热手套
等臂天平2
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.
所需工具：
玻璃导气管
带集气瓶的排水集气槽
水此蓝图制作
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