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In the Classroom
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JCE DigiDemos: Tested Demonstrations
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Mercury Beating Heart: Modifications to the Classical Demonstration
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Metodija Najdoski, Valentin Mirceski, and Vladimir M. Petruševski
Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Sts. Cyril and Methodius University, 1000 Skopje, Republic of Macedonia
Sani Demiri
Private Yahya Kemal College, ul. Aleksandar, Makedonski, No 221000 Skopje, Republic of Macedonia
checked by Daniel Rosenberg
Science Center, Harvard University, Cambridge, MA 12138
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August 2007
Vol. 84 No. 8
p. 1292
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| Abstract |
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By analogy with the classical variant of the mercury beating heart (MBH), we propose several demonstrations of the MBH with various solutions of electrolytes, where the beating is generated by external power supply. Details for performing the experiments of MBH are given in this article. Video clips are offered in addition to classical demonstrations with an overhead projector or video camera. Mercury oscillations were observed without physical contact of mercury with the electrodes. When an aqueous solution of sodium sulfate or alkali hydroxide was used as electrolyte, an amalgam formed (even without direct contact between the electrode and mercury drop) and a mechanism is proposed for this phenomenon.
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| Supplement |
Videos of these experiments are available for viewing online or download.
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Download |
Contents |
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JCE2007p1292W.zip
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Folder JCE2007p1292W containing six video files (QuickTime MPG).
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| More Information |
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Citation |
Najdoski, Metodija; Mirceski, Valentin; Petruševski, Vladimir M.; Demiri, Sani. J. Chem. Educ. 2007, 84, 1292.
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Keywords |
Analytical Chemistry; Demonstrations; Electrochemistry; First-Year Undergraduate / General; High School / Introductory Chemistry; Inorganic Chemistry; Multimedia-Based Learning; Oxidation / Reduction; Second-Year Undergraduate; Surface Science
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History |
Created:
Last Updated: |
6/22/2007
7/6/2007
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 Caution! | | Experiments, laboratory exercises, lecture demonstrations, and other descriptions of the use of chemicals, apparatus, instruments, computers, and computer interfaces are presented in the Journal of Chemical Education as illustrative of new or improved ideas or concepts in chemistry instruction and are directed at qualified teachers. Although every effort is made to assure and encourage safe practices and safe use of chemicals, the Journal of Chemical Education cannot assume responsibility for uses made of its published materials. Many chemicals are hazardous. Precautions for the safe use of hazardous chemicals and directions for their proper disposal are described in the Material Safety Data Sheets and on the labels. We strongly urge all those planning to use materials from our pages to make choices and to develop procedures for laboratory and classroom safety in accordance with local needs and situations. |
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