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Modification of the Experimental Setup to reduce Misconceptions for the Voltaic Cell described in High School Chemistry Textbooks
Modification of the Experimental Setup to reduce Misconceptions for the Voltaic Cell described in High School Chemistry Textbooks
Journal of the Korean Chemical Society. 2003. Feb, 47(1): 79-86
  • Published : February 20, 2003
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Jang, Nak Han
Lee, Kyung Ok
Lee, Jin Seung
Suh, Jung Sang

Abstract
Misconceptions of students for a Voltaic cell were studied and their contents described in the high school chemistry II textbooks were analyzed. This study shows that students have many misconceptions and a few of chemistry textbooks contain some false description in a Voltaic cell. In the most textbooks, the reasons why the measured cell voltage of a Voltaic cell is near 1.1 V at the initial stage and then it decreases with time are not explained clearly. The emf of a Voltaic cell at a standard state is 0.76 V but in some textbooks it is described as 1.1 V of a Daniel cell. Even after learning the Voltaic cell or performing the experiment of textbooks, most students still have some misconceptions. These may be due to at least two following facts: the first is that the measured cell voltage of a Voltaic cell at the initial stage is very similar to that of a Daniel cell. The second is that the most experiment of a Voltaic cell is not performed under the condition of a standard state. Therefore, we have suggested a model of the modified experimental setup of a Voltaic cell that could reduce misconceptions of students.
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