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Experiment of Iron Powder and Sulfur Powder
The test of iron and sulfur
In the past, there was a test of iron powder and sulfur powder. At the beginning, take an appropriate amount of iron powder and sulfur powder, and separate the two devices. Looking at it, the color of iron powder is black and heavy, and the color of sulfur powder is yellow and light.
Then, put the two together in one device to pestle and grind them, so that they can be mixed. After mixing, you can see that their colors are mixed, but the two still have their own characteristics. The magnet is close, the iron powder is attached to the magnet, and the sulfur powder does not respond. Although the two are mixed, they are not combined into one.
Once, use a device to hold this mixture and set it on fire. After a while, the fire gradually intensifies, the mixture changes color and is very hot, and there is a flame that appears at first, and then intensifies, and if it will burst. When it cools, a black lump is obtained, which is strong and heavy.
Then approach the lump with a magnet, and there is no more iron powder attached to it. It can be seen that after the fire, iron and sulfide combine to form a new substance. This shows that sometimes the combination of the substances changes, and the shape changes. At the beginning of mixing but not combining. When it is burned, it will combine, and the physical properties will also change.
In the past, there was a test of iron powder and sulfur powder. At the beginning, take an appropriate amount of iron powder and sulfur powder, and separate the two devices. Looking at it, the color of iron powder is black and heavy, and the color of sulfur powder is yellow and light.
Then, put the two together in one device to pestle and grind them, so that they can be mixed. After mixing, you can see that their colors are mixed, but the two still have their own characteristics. The magnet is close, the iron powder is attached to the magnet, and the sulfur powder does not respond. Although the two are mixed, they are not combined into one.
Once, use a device to hold this mixture and set it on fire. After a while, the fire gradually intensifies, the mixture changes color and is very hot, and there is a flame that appears at first, and then intensifies, and if it will burst. When it cools, a black lump is obtained, which is strong and heavy.
Then approach the lump with a magnet, and there is no more iron powder attached to it. It can be seen that after the fire, iron and sulfide combine to form a new substance. This shows that sometimes the combination of the substances changes, and the shape changes. At the beginning of mixing but not combining. When it is burned, it will combine, and the physical properties will also change.
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