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Oxygen: Bleaching Powder Solution Heated with a Little Cobalt Oxide at 70–80 °C
Oxygen from bleaching powder, as Thorpe's Dictionary (1913) gives it: a strong solution of bleaching powder with a little cobalt oxide gives a steady stream of oxygen at about 70–80 °C, leaving calcium chloride.
The picture: our diagram.
中级
1 day
说明
1
1
Mix bleaching powder solution with a little cobalt oxide
Mix bleaching powder solution with a little cobalt oxide
Make a concentrated solution of bleaching powder and add a small quantity of cobalt oxide. No amounts are given. Ours: in a flask.
此步骤所需材料:
漂白粉1 as required所需工具:
氧化钴
水
圆底烧瓶
化学防溅护目镜2
2
Heat to about 70–80 °C
Heat to about 70–80 °C
Heat to about 70–80 °C, the best temperature for a steady stream of gas. Ours: a water bath.
所需工具:
水浴
电热板
实验室温度计3
3
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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