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All Journal Jurnal Pendidikan Kimia (JPKim) Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Budapest International Research and Critics in Linguistics and Education Journal (Birle Journal) Indonesian Journal of Chemical Science and Technology Didaktika: Jurnal Kependidikan Duconomics Sci-meet (Education & Economics Science Meet) EDUCENTER JURNAL PENDIDIKAN Jurnal Akademika Kimia
Marham Sitorus
Chemistry Education Department, Universitas Negeri Medan, Indonesia
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Energy Environmental Science Health Professions Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Social Sciences Other

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Pengembangan E-Modul Kimia Berbasis Proyek pada Materi Larutan Elektrolit dan Non Elektrolit Indah Sari Sihombing; Marham Sitorus
Educenter : Jurnal Ilmiah Pendidikan Vol. 1 No. 4 (2022): Educenter : Jurnal Ilmiah Pendidikan
Publisher : ARKA INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55904/educenter.v1i4.89

Abstract

This study aims to (1) to determine the results of the analysis of chemistry teaching materials on electrolyte and non-electrolyte solution materials used in schools according to BSNP standards, (2) to develop e-modules for electrolyte and non-electrolyte solution materials according to the BSNP eligibility criteria and have been based on projects, and (3) To determine student learning outcomes after being given project-based e-modules. The population in this study were all students of class X MIA SMA Negeri 1 Deli Tua, totaling 6 classes. The sample in this study was class X MIA 5 who was taught with a project-based chemistry e-module. The instrument used is an e-module feasibility questionnaire according to the BSNP standard, a learning outcome test of 20 questions that have been tested valid. This study uses the method and media development (R&D) with the ADDIE model. The ADDIE model has several stages, namely Analysis, Design, Develop, Implementation, and Evaluation. Where the results of the feasibility analysis of the content feasibility aspect of the e-module are 3.82; language eligibility is 3.83; The feasibility of presenting 3.81 and the feasibility of graphics 3.77 means that the teaching materials from the trial are very valid based on the BSNP. The average student learning outcomes who are taught project-based e-modules in one class are 78.8095. The results of the right-hand t-test with t count = 4.147> t table = 2.086. Thus the criteria for testing the hypothesis t count > t table are met. This means that Ho is rejected, Ha is accepted, so it can be concludedthat the project based chemistry learning e-module developed is better in improving students' chemistry learning outcomes in electrolyte and non-electrolyte solution materials.
Pengembangan Web Pembelajaran Berbasis Web Pada Materi Asam dan Basa Qomaruddin Dalimunthe; Marham Sitorus; Ratu Evina Dibiyantini
Didaktika: Jurnal Kependidikan Vol. 13 No. 4 Nopember (2024): Didaktika Jurnal Kependidikan
Publisher : South Sulawesi Education Development (SSED)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58230/27454312.1022

Abstract

Pada dasarnya manfaat pembelajaran berbasis teknologi dalam menunjang pelaksanaan proses pembelajaran dapat meningkatkan daya serap peserta didik dalam memahami konteks materi pembelajaran, mendorong kemampuan belajar mandiri, guru harus mampu menggunakan web pembelajaran dengan memanfaatkan teknologi yang ada sekarang yang memudahkan siswa untuk pembelajaran. Dalam observasi yang sudah dilakukan di SMA Negeri 1 Sidamanik dalam pembelajaran kimia saat ini hanya menggunakan buku pelajaran dan ppt, hal membuat pembelajaran kurang menarik bagi siswa dan terkadang membuat siswa kurang memahami isi dari materi pembelajaran, tujuan dari penelitian ini adalah untuk mengembangkan web pembelajaran berbasis web yang dikembangkan pada mata pelajaran kimia, dan kelayakan web pembelajaran berbasis web yang dikembangkan. Model penelitian dan pengembangan web pembelajaran berbasis web google sites ini menggunakan model pembelajaran ADDIE. Penelitian ini menggunakan instrumen non test berupa lembar validasi. Hasil kelayakan validasi menunjukkan bahwa pengembangan web pembelajaran web pada materi asam dan basa penilaian validator ahli materi, ahli web dan guru kimia, untuk kelayakan web yang dikembangkan berturu-turut adalah 83,5% ; 86%; 86%; yang berarti web pembelajaran berbasis web pada materi Asam dan Basa tersebut sangat layak untuk digunakan sebagai web pembelajaran.
Influence of the PBL Model on Increasing HOTS and Students' Learning Motivation in Medan High Schools Angel S. Panjaitan; Marham Sitorus
Jurnal Akademika Kimia Vol. 14 No. 4 (2025)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2025.v14.i4.pp204-208

Abstract

This research is motivated by the continued use of conventional learning models (e.g., lectures) in instructional practice. In the learning process, it remains more teacher-centred, with students listening and receiving the material provided. This causes a lack of critical thinking and student motivation in learning. The purpose of this study is to determine the effect of the PBL learning model on improving HOTS and student motivation, and also to determine the effectiveness of the PBL learning model in improving students' HOTS. This research is a quantitative study with a quasi-experimental method. The study results indicate a significant improvement in students' HOTS, as evidenced by the pretest and posttest scores.
Characterization of Gandapura Oil by GC and Analysis of Nitration Product Structure Using FTIR Spectroscopy Theresia Novianti Marpaung; Marham Sitorus
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 9 No. 2 (2026): JULY 2026
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v9i2.72726

Abstract

A study has been conducted on the orientation of the nitration reaction of methyl salicylate from wintergreen oil (Gaultheria Procumbens L.) with sulfuric acid catalyst. The research method was carried out through a reflux process between gandapura oil, HNO3, and H2SO4 at a temperature of 56-60°C for 60 minutes, followed by a washing and recrystallization stage using ethyl acetate. The product obtained was then analyzed using FT-IR. The nitration product is a white crystal, indicating that the compound is relatively pure with a melting point of 100-109℃. Based on the FTIR spectrum, it was confirmed that a nitration reaction had occurred with the appearance of characteristic nitrate (NO2+) absorption at 1537 cm⁻1 (asymmetric).
Co-Authors Angel S. Panjaitan Bernika Evelyn Sibarani Dewi Syafriani Ester Hartina Ria Sinaga Ester Muliana Marpaung Francisca T. A Sitorus Ida Duma Riris Iis Siti Jahro Indah Sari Sihombing Innovayani Saragih Irving Josafat Alexander Junifa Layla Sihombing manihar Situmorang, manihar Nova Damanik Osi Annauli Br Girsang Qomaruddin Dalimunthe Ramlan Silaban Ratu Evina Dibiyantini Retno Dwi Suyanti Rezki Maya Ananda Ribka J Sirait Risma Siahaan Roselva Theresia Manalu Ruth Natalia Manurung Saronom Silaban Simson Tarigan Suria Bersinar Siahaan Theresia Novianti Marpaung