Penerapan Problem-Based Learning Pada Materi Stoikiometri Larutan

Abstract

Most 11th-grade science students exhibit low motivation and struggle with understanding chemistry because it is perceived as abstract, difficult, and irrelevant to everyday life, as evidenced by diagnostic test results showing persistent misconceptions in writing chemical reaction equations and equivalents. To address this issue, a problem-based learning (PBL) strategy is implemented to facilitate students' understanding of concepts through real-world problems.Structured assignments based on case study worksheets complement the students' learning process and become a bridge for them to see God's providence in His creation. This paper aims to evaluate the effectiveness of applying PBL to stoichiometric solution material in 11th grade using a descriptive qualitative method. Overall, the PBL approach enhances students' motivation and aids in comprehending abstract material. The learning outcomes showed that from 19 students, more than 10 successfully wrote ion equations, identified types of chemical reactions, and performed stoichiometric calculations when analyzing various real-world problems. The author acknowledges that not all students can capture all concepts in a limited time, because in the process there is still a need for personal guidance from the teacher for each student. Therefore, to improve future outcomes, it is crucial to provide special time for independent learning, enabling students to develop a deeper understanding and critical thinking skills.