Problem-Based Worksheets Integrated with Corn Cob Adsorbent Experiments in Chemistry Education

Milatul Afifah; Yulia Sukmawardani; Ade Yeti Nuryantini; Rofiqoh Laila Qodariyah; Riri Aisyah; Citra Deliana Dewi Sundar

doi:10.24114/xgyz6371

Authors

Milatul Afifah Sunan Gunung Djati State Islamic University Bandung
Yulia Sukmawardani Sunan Gunung Djati State Islamic University Bandung
Ade Yeti Nuryantini Sunan Gunung Djati State Islamic University Bandung
Rofiqoh Laila Qodariyah Sunan Gunung Djati State Islamic University Bandung
Riri Aisyah Sunan Gunung Djati State Islamic University Bandung
Citra Deliana Dewi Sundar Sunan Gunung Djati State Islamic University Bandung

DOI:

https://doi.org/10.24114/xgyz6371

Keywords:

critical thinking skills, free fatty acid levels, problem based learning

Abstract

This study aims to analyze students' ability to complete problem-based worksheets, analyze critical thinking skills, and describe the effect of adding corn cob adsorbents on the free fatty acid content in used cooking oil. The method used is pre-experimental with a one-shot case study design. Research instruments include observation sheets, problem-based worksheets, and critical thinking skills tests. The results showed that the average ability of students in learning with problem-based worksheets reached a score of 92 (very good), and students' critical thinking skills increased with an average score of 77.72 (good). In addition, the addition of corn cob adsorbent to used cooking oil reduced the free fatty acid content from 0.53% (without treatment) to 0.26%, compared to the addition of zeolite activated carbon, which reduced it to 0.34%. This shows that corn cob adsorbent is effective in reducing the free fatty acid content in used cooking oil.

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