Music Generated by a Zn/Cu Electrochemical Cell, a Lemon Cell, and a Solar Cell: A Demonstration for General Chemistry

• Autores: Susan G. Cady
• Localización: Journal of chemical education, ISSN 0021-9584, Vol. 91, Nº 10, 2014, págs. 1675-1678
• Idioma: inglés
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• Resumen

  • The circuit board found in a commercial musical greeting card is used to supply music for electrochemical cell demonstrations. Similar to a voltmeter, the �modified� musical device is connected to a chemical reaction that produces electricity. The commercial 1 V battery inside the greeting card circuit board can be replaced with an external power source such as a zinc and copper(II) electrochemical cell, a lemon battery or other zinc/proton cell variations, or a commercial solar cell. Directions are given to modify the musical circuit board, to make two types of homemade batteries, and to connect the �modified� musical device to an external power source to create a musical electrical circuit. Unlike a buzzer or flashing light, noticeable variations in music can warn the user of a gradual impending power failure. Students, including the visually impaired and blind, can relate the low volume and the slow tempo of a familiar song with weak or dying batteries and the lack of sufficient power