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　　The hydrogen ion that obtained an electron from the negative pole becomes hydrogen gas and it produces bubbles as shown in Fig.18. By electric current for a period of 40 hours, with 24V, while irradiating the ultraviolet rays, the positive electrode of high conductive charcoal becomes black as shown in Fig.18.
　　The carbon atom that adhered on the positive electrode is explained as follows. The carbon atom in carbonated water touches to the positive electrode, and it adheres to the carbon electrode owing to the energy given from ultraviolet light. This evidence supports the following idea. It is conceivable that a carbon atom behaves as an anion.

　　　　　　　　
Fig.18 Hydrogen gas is produced by electric current where carbon electrodes are used in carbonated water.


3.2.c　Production of iron carbide by an electrode reaction of carbon and iron in water
　The experiment was carried out in order to confirm the fact that iron carbide is produced in the water. The floating substances are produced by an electrolysis processing of water solved with iron by using carbon electrodes. This reaction is an electrode reaction, because production of the floating substances is promoted remarkably by agitation.
　　It is considered that the same substance similar to the products from carbonated water mixed with iron powder was produce, because it is made from the same material through similar water. At the beginning of this process, many small bubbles appear at negative electrode. The hydrogen ions are produced by oxidization of iron atoms and the protons for the bubbles at the negative electrode.
　　After some hours, iron atoms adhere to the negative electrode of carbon. On the other hand, the exhaustion on positive electrode of carbon is large amount, and the temperature of the water becomes high. Although there is the possibility related to the nature of charcoal electrode, we consider the exhaustion is caused by the oxidation of charcoal electrode, and the carbon oxide reacts with iron.
　Fig.19 shows the result of the experiment. Here, the electric current was carried out by voltage of 24 bolts, a period of 4 hours, setting the rotating magnet for agitation. The floating substance includes bubbles a lot. So the floating substance decreases after the reaction.




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