Details

Autor(en) / Beteiligte

• Matsuyama, Yukinori
• Yasuoka, Takashi
• Mitsuzawa, Syunmei
• Sasaki, Tunetaka

Titel

Observation of magnetic repulsion acting on a nitrogen bubble on a water surface: A simple experiment studying diamagnetic property of nitrogen

Ist Teil von

• Journal of chemical education, 1997-08, Vol.74 (8), p.943

Ort / Verlag

Division of Chemical Education

Erscheinungsjahr

1997

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Observation of the paramagnetic property by a simple experiment showing the attraction of an oxygen bubble on the water surface to a magnet has been reported. In this article, we report the opposite behavior magnetic repulsion observed for a nitrogen bubble by the same method. A nitrogen bubble of 1-0.5cm diameter is produced by using a syringe on the surface of a dilute soap solution placed in a Petri dish in the atmosphere. A permanent magnet with 4500 gauss is made to approach the bubble from a 45 angle to the water surface. As the distance between the magnet and the bubble approaches 0.3cm, the bubble will be seen to be repelled by the magnet. The present experiment may become more attractive and instructive for students of college chemistry and physics, if it is demonstrated together with the experiment of the attraction of an oxygen bubble to the magnet.