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All Journal Cakrawala Pendidikan Jurnal Pengajaran MIPA Jurnal Pengajaran Matematika dan Ilmu Pengetahuan Alam Jurnal Sains dan Teknologi Kimia Jurnal Riset dan Praktik Pendidikan Kimia Jurnal Inovasi Pendidikan IPA Lantanida Journal JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika) Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Journal of Chemistry Diklabio: Jurnal Pendidikan dan Pembelajaran Biologi Jambura Journal of Educational Chemistry JURNAL PENDIDIKAN MIPA Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Didaktika: Jurnal Kependidikan Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram JIPI (Jurnal IPA dan Pembelajaran IPA) Jurnal Pengabdian Isola Jurnal Riset dan Praktik Pendidikan Kimia Jurnal Pendidikan IPA Indonesia IJIS Edu : Indonesian Journal of Integrated Science Education
Ijang Rohman
Universitas Pendidikan Indonesia
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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aMixer Mini-Data Acquisition System: An Optimization Approach to Observe of the HCl-Sodium Thiosulfate Reaction Nabira Salwa; Ijang Rohman; Miarti Khikmatun Nais; Achmad Mudzakir; Gun Gun Gumilar
Jurnal Penelitian Pendidikan IPA Vol 12 No 7 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i7.15401

Abstract

In determining the reaction rate between hydrochloric acid (HCl) and sodium thiosulfate (Na₂S₂O₃), conventional experiments commonly rely on visual observation of sulfur turbidity, making endpoint determination highly dependent on lighting conditions and observer judgment. These limitations reduce measurement accuracy, repeatability, and objectivity, highlighting the need for an alternative Data Acquisition System (DAS) capable of providing continuous quantitative measurements. This study focuses on the development and optimization of a Data Acquisition System (DAS) utilizing transducers and photodetectors through the Research Science Design (RSD) approach as an alternative method for reaction kinetics analysis. The experimental setup consisted of a borosilicate reactor enclosed in a black acrylic chamber to minimize ambient light interference, equipped with 3 W high-power LEDs (green, blue, and white) as light sources and a Mini Mixer interface integrated with MGA software for continuous data acquisition. Each LED configuration was evaluated through three experimental repetitions, and the recorded signals were analyzed using Relative Standard Deviation (RSD) to assess measurement stability and determine the optimum light source. Based on the evaluation results, the DAS was capable of (1) continuously recording sulfur colloid formation in real time, (2) demonstrating the highest measurement stability under green light with an RSD of 1.18%, and (3) eliminating observer-dependent visual bias. The proposed system provides a simple, coding-free, objective, and affordable solution for improving the quality and efficiency of reaction kinetics measurements in chemistry education.
Fostering Critical Thinking Skills in Discovery Learning: The Role of a Covalent Bond Simulator Riani Damay Rosida; Gun Gun Gumilar; Miarti Khikmatun Nais; Ijang Rohman; Muhamad Nurul Hana
Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Vol. 14 No. 3: July 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-ps.v14i3.21573

Abstract

Critical thinking skills are among the 21st-century competencies that need to be fostered in science education. The abstract nature of the covalent bond concept continues to cause difficulties and misconceptions, potentially hindering the development of critical thinking skills. This study aimed to analyze the role of a feedback-based covalent bond simulator integrated with the Discovery Learning model in fostering students' critical thinking skills. A one-group pre-test post-test design was employed, involving 22 Grade 11 students from a public high school in Bandung. Data were collected using a critical thinking skills test based on Robert Ennis's indicators and analyzed using the Shapiro-Wilk test, Paired Sample t-Test, and Wilcoxon test. The results showed that the mean critical thinking skills score increased from 10.27 to 18.50. Based on the paired-samples t-test, a statistically significant difference was found between the pre-test and post-test scores (t = -6.475; df = 21; p < 0.001), and all critical thinking skill indicators showed significant improvement (p < 0.05). These findings provide preliminary evidence that integrating the simulator with Discovery Learning plays a role in facilitating students' critical thinking skills and supporting conceptual understanding for advanced chemistry learning.
Co-Authors Abdurachman, Bagas Abraham Mora Achmad Mudzakir Ade Elvia Adeng Slamet Agus Setiabudi Ali Kusrijadi Amalia, Vina Nurul Any Fitriani Asep Kadarohman Bagas Abdurachman Billy Oktora Abdillah Fauzi Binar Kurnia Prahani Budiman Anwar Candrawati, Emilia Cindy Lestari Deira Angelina Djaka Sasmita Elva Stiawan Emilia Candrawati Emilia Candrawati Ezha, Sephianti Dwika Firli Nurpatihah S Fitria Fathan Fransisca Sudargo Tapilouw Gun Gun Gumilar Gun Gun Gumilar Harianti Harianti Heli Siti Halimatul Heli Siti Munawaroh Hendrawan Hendrawan Hokcu Suhanda Iip Izul Falah Irvan Permana Lathifah, Siti Maulani Liliasari Liliasari , Mellyta Uliyandari Uliyandari Miarti Khikmatun Nais Mr Sjaeful Anwar Muhamad A. Martoprawiro Muhamad Nurul Hana Muhamad Nurul Hana Muhammad Nurul Hana Muhammad Syahrur Royhan Nabira Salwa Nais, Miarti Khikmatun Nopiyanti Nopiyanti Novi Nurhayati Nurhamida Anar Nurhayati, Mita Nurjanah, Desi Fauza Nurlatifah*, Nurlatifah Nursyahbana, Galih Lazuardi Nuryani Rustaman Omay Sumarna Pingky Chandra Priyanka Pusfitasari, Dewi Vitama Rahmat Setiadi Rahmat Setiadi Rahmat Setiadi Ramaulita, Thara Nabila Ratnaningsih Eko S. Riani Damay Rosida Ropi Marlina Santi Deva Satwika Trianti Ngandoh Shiang-Yao Liu Sianturi, Winda Fourthelina Sri Mulyani Sukasih Sukasih Triannisa Rahmawati Triannisa Rahmawati, Triannisa Yanti Herlanti Yanti Herlanti Yaya Sonjaya Yayan Sunarya Yendi Yuliani, Galuh Yusi Riksa Yustiana, Yusi Riksa