The Development of Demische Software to Detect and Reduce Misconception in Chemical Equilibrium through Conceptual Change Text Strategy

—This research is used to obtain Demische (Decreasing misconception in chemical equilibrium) software that is proper through conceptual change text strategy that is developed as learning media to detect and reduce misconception in chemical equilibrium 11th grade. Software feasibility can be known by three aspects that are (1) software validity based on content and construct validity, (2) practicality based on student response questionnaire supported by student observation activities, (3) effectiveness based on shifting understanding of student conceptions from misconceptions to knowing the concepts. This research uses Research and Development (R&D) method based on Borg and Gall, with 12 subject that are the students of 11th grade at Senior High School 1 Pandaan, Pasuruan in Indonesia who have studied chemical equilibrium and have potential to misconception. The result shows that Demische software was used to detect and reduce misconception through conceptual change text strategy in chemical equilibrium which can be known by three aspects that are (1) the average percentage of content validity is 83,06% and construct validity is 85,60%, both of validity are categorized as highly valid; (2) the average percentage of student response is 91,11% and categorized as highly practical; (3) the average percentage of effectiveness based on shifting understanding of student conceptions from misconceptions to knowing the concepts is 84,92% and categorized as highly effective. Based on the result, Demische software is proper to detect and reduce misconception in chemical equilibrium.