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Chap. 1　The fact that bubbles are produced by mixing
　　　　　　of iron powder with carbonated water

1.1 The bubble that is produced by mixing of iron with carbonated water
1.1.a　The materials those used for experiment
　The material of iron that was used for experiments is shown in Fig.2 (a), and the carbonate water is shown in Fig..1 (b).
　　　　　　　　　　　　　　　　 　
　 (a) The powder of iron　　　　　　 (b) The carbonated water
Fig. 1　Materials for experiments (Sodium is included 13ppm in the carbonated water)

1.1.b The bubbles produced in the carbonated water by mixing powder of iron for some time 　
　After powder of iron was mixed with carbonated water, many bubbles are produced at the bottom of the water. Each bubble surfaces together with small solid material. The bubble explodes at the surface of the water at first. But according to accumulation of floating materials, the bubbles begin to stay on the surface of the water for some time.
　Fig.3 (a),(b),(c),(d),(e),(f)　show the photographs of bubbles under the surface. The photographing is carried out by PENTAX Optio W 90, 1cm macro, microscope mode. 　　 　
(a) after 86minites　　　　　　　　　　　　　(b) after 2hours

　 　
(c) after 3hours 52minutes　　　　　　　(d) after 4hours 45minutes
Fig.2 The bubbles those were masde from the carbonated water (80cc), that is mixed with powder of iron (5g)


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