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      The effectiveness of predict-observe-explain technique in probing students' understanding about acid-base chemistry: a case for the concepts of pH, pOH and strength

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      Author(s)
      Kala, N.
      Yaman, F.
      Ayas, A.
      Date
      2013-06
      Source Title
      International Journal of Science and Mathematics Education
      Print ISSN
      1571-0068
      Publisher
      Springer Netherlands
      Volume
      11
      Issue
      3
      Pages
      555 - 574
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      The present study describes high school students’ conceptions about acids and bases in terms of pH, pOH, microscopic level, strength, and concentration. A total of 27 high school students participated in the study. The data was collected using 3 POE tasks and a semi-structured interview. The data analysis demonstrated that most of the students had poor understanding related to a drawing of weak and strong acids. In addition, the findings revealed that the POE’s were effective in terms of gathering students’ predictions and reasons for the prediction of outcomes in an open-ended format. The POE tasks also revealed that some of the students had misconceptions regarding pH and pOH. The students believed that pH was a measurement of the acidity, while pOH was a measurement of the basicity. The findings obtained have certain implications for the secondary chemistry program.
      Keywords
      Assessment
      Misconceptions
      Ph
      Poe
      Poh
      Strength
      Permalink
      http://hdl.handle.net/11693/13088
      Published Version (Please cite this version)
      http://dx.doi.org/10.1007/s10763-012-9354-z
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      • Graduate School of Education 108
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