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All Journal Jurnal SOLMA Hydrogen: Jurnal Kependidikan Kimia Jurnal Senopati : Sustainability, Ergonomics, Optimization, and Application of Industrial Engineering Jurnal Abdimas Kartika Wijayakusuma CHEDS: Journal of Chemistry, Education, and Science Jurnal Lingkungan dan Sumberdaya Alam (JURNALIS) Jurnal Pijar MIPA UNESA Journal of Chemical Education Indonesian Journal of Chemical Science
Effendi, Meilisa Rusdiana Surya
Universitas Bojonegoro
Humanities Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Education Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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IMPROVING STUDENTS’ CHEMICAL LITERACY SKILLS THROUGH PROBLEM-BASED LEARNING MODELS ON STOICHIOMETRY TOPICS Trisnawati, Ade; Permatasari, Adinda Amelia; Surya Efendi, Meilisa Rusdiana
UNESA Journal of Chemical Education Vol. 15 No. 1 (2026)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ujced.v15n1.p38-45

Abstract

The purpose of this study was to determine students’ chemical literacy skills after being taught stoichiometry using a problem-based learning model. The Research design is a pre-experimental design with a one-group pretest-posttest design. The sample in this study was 13 new students of Chemical Engineering at PGRI Madiun University in the 2025/2026 academic year. Data collection used a context-based chemical literacy test carried out before and after PBL learning. Based on the Research, the pretest results showed that 100% of students had low chemical literacy, while the posttest results showed that 74% had low chemical literacy and 16% had moderate chemical literacy. Then, the analysis of students' chemical literacy levels from their pretest answers showed the highest percentage at the Scientific Illiteracy Level (72%) and the posttest results showed the most significant percentage at the Functional Scientific Literacy Level (32%). The implementation of PBL to improve students’ chemical literacy skills should consider several factors, such as the lecturer’s support for learning, the selection of material topics, information on students’ misconceptions in stoichiometry, and alignment between the activity design and targeted literacy indicators.
KARAKTERISASI VISUAL BATAS DUA FASA PADA SISTEM FENOL-AIR SEBAGAI STUDI AWAL PEMISAHAN LIMBAH FENOLIK Zuffa Anisa; Meilisa Rusdiana Surya Efendi
Jurnal Lingkungan dan Sumberdaya Alam (JURNALIS) Vol. 8 No. 2 (2025): Jurnal Lingkungan dan Sumberdaya Alam (JURNALIS)
Publisher : Program Studi Teknik Lingkungan, Fakultas Teknik, Universitas Banten Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47080/jls.v8i2.4217

Abstract

Fenol merupakan polutan prioritas yang berbahaya dan sulit diuraikan secara alami, sehingga diperlukan metode pemisahan yang efektif. Penelitian ini bertujuan memetakan miscibility gap sistem fenol–air melalui pendekatan visual sederhana berbasis transisi kejernihan dan kekeruhan. Campuran fenol dan air dengan variasi rasio diuji dengan pemanasan hingga suhu homogenisasi (T1) dan pendinginan hingga munculnya kekeruhan kembali (T2). Hasil penelitian menunjukkan bahwa transisi kejernihan terjadi pada suhu rata-rata 30-31°C di hampir seluruh komposisi, mengindikasikan keberadaan daerah dua fasa yang luas dan kestabilan suhu transisi. Hal ini menegaskan bahwa pemisahan fasa pada sistem fenol-air tidak hanya ditentukan oleh komposisi, tetapi juga sangat sensitif terhadap perubahan suhu kecil. Dengan demikian, temperatur ini dapat dijadikan acuan sebagai sebagai suhu operasi optimal atau suhu kritis batas ketercampuran fenol dari air secara praktis menggunakan metode transisi fasa. Metode visual eksperimental memberikan gambaran awal yang informatif dan dapat digunakan sebagai dasar pengembangan penelitian lanjutan maupun perancangan proses pemisahan skala laboratorium.
Co-Authors Amalia Ma’rifatul Maghfiroh Ardana Putri Farahdiansari Ardiansyah, Ananda Dimas Arifin, Putri Autika ASHARI, FAISAL Dyah Setyaningrum, Dyah Kusumaning Tiyas, Windi Pangesti Lailatul Mubarokah Lailatul Mubarokah Nursaida, Marta Citra Permatasari, Adinda Amelia Prasetya, Giraldi Eka Putri, Yustika Arida Rizky Stighfarrinata Rohsaita, Amalia Saputra, Arya Ananda Thohir, Muhammad Bakhru Trisnawati, Ade Zuffa Anisa