Özet:

This study was designed as a survey model and aimed to determine chemistry preservice teachers’ concepts of acidity and alternative conceptions through sub-microscopic drawings. It involved 109 preservice chemistry teachers. Two open ended questions for determining their images of acidity through microscopic drawings were used as a data collection tool. The results revealed that most of the participants have images that are not in accord with scientific thought about acidity, specifically regarding ionization, hydration, stoichiometry, concentration, concentrated/dilute. It was determined that preservice teachers explain the acid strength by bond strength and the amount and elements of molecules and ions present in solution. It was also determined that preservice teachers have alternative conceptions such as: “strong acids do not ionize,” “acidity increases as the number of H3O+ in a solution increases,” and, “concentrated acids do not ionize, but diluted acids do.”

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