Conceptual Validation of Project Based Learning in Buffer Solution

This research was applied to the project learning model of supporting materials at high school SMAN 3 Jambi City. The in 2013 curriculum must fulfill five steps scientific approach namely Observing, Asking, Experimenting, Collecting data, and Communicating, which is goal a like this make students understand well, educational design-based that adopts substance formative evaluation type with characteristics experts procedural assessment, one-on-one evaluation, small group field presentation. concept can be integrated development method. Project Based Learning (PjBL) Buffer Solution using process hybrid theory-based directing eight-step practice. theoretical are identifying data sources, collecting analyzing while practical generating ideas, describing models, validating concepts practitioners formulating recommendations for testing models. product validated by team includes practitioner validation see practicality being developed. A test carried out application results showed chemistry PjBL could increase activity students' on buffer solutions. student outcomes solution also observed based value general obtained cycle I 68.09 increased 74.81 II % completion classical way from 39.39 percent 87.88 fulfills marker success completeness reaching 85 Minimum Completeness Criteria 70.