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The student’s prediction skills in chemistry experiments areimportant skills for pre-service chemistry students to stimulate students reflective thinking at each stage of chemistry experiments, qualitatively and quantitatively. A Virtual Chemistry Laboratory was designed to provide opportunities for students to practicing kinds of chemistry experiments everywhere, anytime, and repeatedly, before exercising the real experiment. This research was conducted by mixed method with triangulation data, in which the Virtual Chemistry Laboratory content was constructed using the Model of Educational Reconstruction and developed to enhanced students ability to predict the experiment results and analysed the cause of error, calculating the accuracy and precision with carefully in using chemicals. This research bring out a new and simple experiment design inside Virtual Chemistry Laboratory, and the implementation showed student’s transformation to executing important decision, extremely beware with accuracy, but still had low concern in precision. It enhancing students level of reflective thinking skills related to their prediction skills 1 until 2 stage This study recommends for different subject matter to provide more opportunities for students to expand another chemistry experiments.

proceedings of the proceedings of the 5th annual international seminar on trends in science and science education, aistsse 2018, 18-19 october 2018, medan, indonesia

Virtual Chemistry Laboratory as Pre-Lab Experiences: Stimulating Student’s Prediction Skills