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Fig.19　The products of electrolysis processing of water solved with iron by using carbon electrodes are similar to the products in carbonated water mixed with iron powder. 　


Summary
　The iron carbide is produced from the carbonated water that mixed with iron. The carbon dioxide dissolves in water well. Here, the electronegativity of carbon is lager than that of hydrogen atom, and electronegativity of iron atom is smaller than that of hydrogen atom. So, iron atom takes oxygen atom from carbon atom and the carbon atom connects to iron atom.

References
[3] National Astronomical Observatory, "Rika Nenpyo (Chronoligical Scientific Tables 2008), pp. 503,2007.



























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