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All Journal JKPK (Jurnal Kimia dan Pendidikan Kimia) Sciening : Science Learning Journal
Tuerah, Jeanne Maria
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Chemical Engineering, Chemistry & Bioengineering Chemistry Education Environmental Science

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Peningkatan Hasil Belajar Stokiometri pada Kuliah Kimia Dasar Menggunakan Pendekatan Flipped Classroom Rumengan, Stefan Marco; Maanari, Chaleb Paul; Utami, Aisyiah Restutiningsih Putri; Mustapa, Mustapa; Jannah, Miftahul; Paat, Vlagia Indira; Dumanauw, Varisky Abraham; Tuerah, Jeanne Maria; Karundeng, Marlina; Sambeka, Yana
SCIENING : Science Learning Journal Vol. 5 No. 1: Juni 2024
Publisher : Jurusan Pendidikan IPA FMIPAK Universitas Negeri Manado

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Abstract

Flipped classroom< em> merupakan pendekatan pembelajaran di mana isi materi dan keterampilan yang biasanya diajarkan selama sesi kelas disampaikan di luar kelas Penelitian ini bertujuan untuk mengevaluasi peningkatan hasil belajar mahasiswa dengan menggunakan model pembelajaran flipped classroom< em> pada materi stokiometri dalam kuliah kimia dasar Metode penelitian yang digunakan adalah penelitian kuantitatif dengan metode eksperimen dan desain one group pretest posttest< em> Sampel penelitian terdiri dari 35 mahasiswa kelas A di program studi pendidikan matematika Universitas Negeri Manado Unima Data dikumpulkan melalui tes hasil belajar dengan memberikan pretest< em> sebelum proses perkuliahan dan posttest< em> setelah proses perkuliahan dilaksanakan Hasil penelitian menunjukkan bahwa rata rata hasil belajar mahasiswa pada pretest< em> adalah 49 33 sedangkan pada posttest< em> meningkat menjadi 87 33 Pengujian N Gain score< em> menunjukkan skor sebesar 77 yang masuk dalam kategori efektif dan tinggi Berdasarkan temuan tersebut dapat disimpulkan bahwa penerapan model flipped classroom< em> secara efektif dan signifikan meningkatkan hasil belajar mahasiswa pada materi stokiometri dalam kuliah kimia dasar di program studi pendidikan matematika Unima < p>
Effect of Phosphoric Acid (H3PO4) Activation on the Preparation of Activated Carbon from Gymnostoma Rumphianum Wood Tengker, Soenandar Milian Tompunu; Lumingas, Pamela; Tuerah, Jeanne Maria; Jannah, Miftahul; Rampengan, Alfrie Musa
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 10, No 2 (2025): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v10i2.107623

Abstract

The utilization of Roya wood branches (RWB) as raw material for activated charcoal production has not yet been optimized in North Sulawesi, specifically in Wulauan Village, North Tondano District. This study aims to present the results of the analysis of the physical and chemical properties, X-Ray Diffraction (XRD), and Transmission Electron Microscope (TEM) of RWB-based activated charcoal. The production of activated charcoal was conducted in three stages: sample preparation, pyrolysis of RWB at a temperature of 365°C for approximately 3 hours, and activation of RWB charcoal using phosphoric acid (H₃PO₄) at concentrations of 1%, 2%, and 3% for 24 hours. The analysis of physical and chemical properties of both non-activated and H₃PO₄-activated RWB activated charcoal showed that the best quality was obtained at a 3% activator concentration, with a moisture content of 0.1683%, ash content of 2.3321%, volatile matter content (VMC) of 0.9429%, fixed carbon (FC) content of 96.7250%, and iodine adsorption capacity (IAC) of 10,535 mg/g, all of which meet the SNI 06-3037-1995 for activated charcoal. XRD analysis showed that non-activated RWB charcoal had three broad diffraction peaks in the ranges of 9–14°, 20–25°, and 35–50°, along with one sharp peak in the range of 25–30°. After activation with H₃PO₄, only three broad diffraction peaks were observed at 9–14°, 20–25°, and 35–50° for all three H₃PO₄ concentration variations.TEM analysis indicated that non-activated RWB charcoal had particle sizes ranging from 20–33 nm, while after activation with 1% H₃PO₄, the particle sizes ranged from 41–51 nm..
Co-Authors Aisyiah Restutiningsih Putri Utami Alfrie Musa Rampengan Chaleb Paul Maanari Lumingas, Pamela Marlina Karundeng Miftahul Jannah Mustapa Mustapa Paat, Vlagia Indira Stefan Marco Rumengan Tengker, Soenandar Millian Tompunu Varisky Abraham Dumanaw Yana Sambeka