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Hydrogen: Jurnal Kependidikan Kimia
Published by Universitas Pendidikan Mandalika
ISSN : 23386487     EISSN : 26563061     DOI : Prefix 10.33394
Core Subject : Science, Education,
Chemistry Education
Hydrogen: The Chemistry Education Journal published by the Chemistry Education Study Program which contains articles raised from the results of conceptual research and studies in chemistry and chemistry education including education and learning, device development, media and learning models.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 689 Documents
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Synthesis and Application of CaO-MgO Catalyst from Dolomite for Biodiesel Production Poeloengan, Vikky Pramudya Herdiansyah; Pratama, Ananda Melati Octa; Saputro, Erwan Adi
Hydrogen: Jurnal Kependidikan Kimia Vol. 14 No. 1 (2026): February 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v14i1.19579

Abstract

Dependence on dwindling fossil fuels drives the development of biodiesel as a renewable alternative energy. However, the use of homogeneous catalysts, which are difficult to separate, non-reusable, and generate waste, remains a major obstacle. This review aims to examine the potential of dolomite-based heterogeneous catalysts (CaO–MgO) as a more sustainable solution. These catalysts are synthesized through the calcination of dolomite, an abundant carbonate mineral with main components of CaCO₃ and MgCO₃, and can be modified by adding Fe₂O₃, Fe₃O₄, SiO₂, or Na doping to enhance catalytic activity, surface area, and bifunctional properties. Various vegetable oil feedstocks such as Crude Palm Oil (CPO), used cooking oil, tamanu oil, and canola oil have been successfully converted into biodiesel via transesterification (and simultaneous esterification-transesterification) using these catalysts, yielding biodiesel >90% with quality that meets national and international standards. Thus, the synthesis of CaO–MgO catalysts from dolomite promises an effective, economical, and environmentally friendly application for large-scale biodiesel production.
Validation of Ethnochemistry-Integrated Two-Tier Items for Chemical Literacy among Pre-service Chemistry Teachers Ningthias, Dyah Puspitasari; Hidayanti, Ermia; Anwar, Yunita Arian Sani; Listantia, Nora; Firmansyah, Dodiy; Sugondo, Baiq Viona Olganita
Hydrogen: Jurnal Kependidikan Kimia Vol. 14 No. 1 (2026): February 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v14i1.19581

Abstract

Chemical literacy is an essential competency for preservice chemistry teachers because it supports the ability to understand chemical concepts, interpret chemical information, and apply chemistry in daily and socio-scientific contexts. However, chemical literacy assessment is often limited to conventional multiple-choice tests that do not adequately measure reasoning or contextual application. This study aimed to validate ethnochemistry-integrated two-tier multiple-choice with 10 items test for measuring chemical literacy among preservice chemistry teachers. A quantitative survey design was employed with 35 participants from a public university in West Nusa Tenggara selected through convenience sampling. This approach allowed the researchers to obtain initial empirical evidence on the psychometric quality of the ethnochemistry-integrated two-tier instrument for measuring chemical literacy among pre-service chemistry teachers. The instrument was developed by adapting chemical literacy indicators and integrating local ethnochemical contexts into two-tier items, followed by expert judgment validation. Data were collected through face-to-face, paper-based administration and analyzed using the Rasch measurement model to examine item difficulty calibration, item fit statistics, reliability, separation indices, and unidim The Wright map shows that most pre-service chemistry teachers were clustered around the mean ability range (−1 to +1 logits), indicating moderate chemical literacy, while the items were well distributed in difficulty with more challenging tasks such as Item 8 and Item 4 located at higher logits. Rasch analysis further confirmed acceptable measurement quality, with person reliability of 0.71 and Cronbach’s alpha of 0.74, item fit statistics mostly within the acceptable range (Infit MNSQ 0.78–1.43), and strong unidimensionality evidenced by 40.9% variance explained by the measures.ensionality through residual analysis. This study is novel in validating an ethnochemistry-integrated two-tier multiple-choice instrument using Rasch analysis to provide a culturally responsive and reasoning-based assessment of chemical literacy among pre-service chemistry teachers by connecting chemical concepts with local wisdom and real-life contexts.
Needs Analysis of Redox Reaction E-Module Teaching Material Based on PjBL Integrated with Local Wisdom Pakpahan, Edwin; Silaban, Ramlan; Sianturi, Citra
Hydrogen: Jurnal Kependidikan Kimia Vol. 14 No. 1 (2026): February 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v14i1.19587

Abstract

This study aims to identify the need for developing a redox reaction e-module based on Project-Based Learning (PjBL) integrated with ethnopedagogy in senior high school chemistry learning. The research addresses the gap between the Merdeka Curriculum’s emphasis on contextual, student-centered learning and the predominantly textbook-oriented instructional practices implemented in classrooms. A descriptive qualitative approach was employed at SMA Negeri 2 Percut Sei Tuan involving one chemistry teacher and 33 twelfth-grade students selected through purposive sampling. Data were collected through teacher interviews, student needs questionnaires, analysis of the Learning Objective Flow (ATP), and evaluation of existing textbooks using BSNP criteria. Quantitative data from questionnaires were analyzed using percentage calculations, while textbook feasibility was assessed using a five-point Likert scale. The findings indicate that 81.81% of students experience difficulties in understanding redox concepts, and learning remains largely expository and textbook-centered. Although the analyzed textbooks achieved a high feasibility score (89.36%, categorized as very suitable), they lack support for project-based, contextual, and ethnopedagogical integration. Furthermore, 96.96% of students expressed the need for interactive electronic learning media integrated with local wisdom. These results confirm the urgency of developing a structured e-module that aligns curriculum standards with active and culturally responsive learning. This study contributes theoretically by providing an empirical and systematic needs-analysis framework as a foundational basis for designing a PjBL-oriented redox e-module integrated with ethnopedagogy, addressing the limited research on culturally contextualized digital chemistry teaching materials.
Green Synthesis of Copper Nanoparticles (CuNPs) using Chaya (Cnidoscolus aconitifolius) Leaves Extract as a Bioreductant Faricha, Yeni Askiyatul; Sutoyo, Suyatno
Hydrogen: Jurnal Kependidikan Kimia Vol. 14 No. 1 (2026): February 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v14i1.19612

Abstract

Copper nanoparticles (CuNPs) are metallic particles sized 1-100 nm. This study was conducted to develop an ecofriendly and sustainable approach for CuNP synthesis using Cnidoscolus aconitifolius (chaya) leaves extract as a natural bioreductant. The research aimed to determine the optimal synthesis conditions, and characterize the resulting CuNPs. This experimental laboratory study employed a green synthesis method by reducing CuSO₄·5H₂O solution with chaya leaves extract. CuNPs were synthesized at various volume ratios (1:1, 1:2, 1:3, 1:4) and pH values (6-12). Data were collected using instrumental analyses (UV–Vis, FTIR, PSA, and XRD). The obtained data were analyzed descriptively based on spectral, structural, and particle size characteristics. The optimal synthesis condition was achieved at a 1:1 ratio and pH 10, producing CuNPs with a maximum absorption peak at 325 nm, an average particle size of 35.17 nm, and a polydispersity index of 0.2656. FTIR spectra indicated Cu vibrations, while XRD analysis shows the typical 2θ peaks for copper (32.57°, 35.60°, 38.72°, 48.91°, 53.32°, 61.67°, 68.02°, and 72.51°). These findings demonstrate the potential of chaya (Cnidoscolus aconitifolius) leaves extract as a sustainable bioreductant for green synthesis of copper nanoparticles, supporting the development of ecofriendly nanomaterials.
Theoretical Study of The Structure of Anthocyanin Dyes to Improve The Performance of Dye Sensitized Solar Cells (DSSCs) Imelda; Jusmarni; Aziz, Hermansyah; Deswita, Elvira; Admi; Ostari, Dwi Ningsih
Hydrogen: Jurnal Kependidikan Kimia Vol. 14 No. 2 (2026): April 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v14i2.18246

Abstract

In this study, anthocyanin dyes have been designed in two ways: without modification and with modification, incorporating donor chains and π-chains, and forming the structure of type D-π-A dyes. The anthocyanin dyes used are delphinidine, cyanidin, pelargonidin, malvidin, petunidine, and fragarine. Meanwhile, the modified molecule is a combination of anthocyanin dye as an acceptor chain, coumarin as a donor chain, and 1,4-dihydro-pyrrolo[3,2-b]pyrrole as a π-conjugation chain. The molecular structure was calculated using a 16W Gaussian Software with the DFT method and the B3LYP/6-31G base set. The results of the calculation on the dye without modification showed that the malvidin dye produced the smallest bandgap of 2.4085 eV and the largest light absorption. Meanwhile, the results of the calculation of the modified dye showed that the modified dye with the delphinidin acceptor produced the smallest bandgap of 1.4485 eV and the largest light absorption. In conclusion, modified anthocyanin dyes can improve the light absorption efficiency in DSSCs.
CHEMLIT: Development and Feasibility of a Sensor-Based Chemistry Practicum Tool for Electrolyte Solutions Surbakti, Lorry Enjlina Br; Parhusip, Maria Murniyanti; Patulak, Natasya; Palilingan, Septiany Ch.; Rumengan, Stefan Marco; Akbar, Jakub Saddam
Hydrogen: Jurnal Kependidikan Kimia Vol. 14 No. 2 (2026): April 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v14i2.19512

Abstract

Chemistry learning requires the integration of macroscopic, submicroscopic, and symbolic representations. However, limited availability of practicum tools in senior high schools often hinders students’ comprehensive understanding of chemical concepts, particularly in electrolyte and nonelectrolyte solutions. This study aimed to develop and implement CHEMLIT, a sensor-based chemistry practicum tool designed to support learning on solution electrical conductivity. The study employed a Research and Development (R&D) approach using the ADDIE model, consisting of analysis, design, development, implementation, and evaluation stages. Needs analysis was conducted through classroom observations and teacher interviews, followed by prototype design, assembly, calibration, and functional testing to ensure stability and safety. The implementation involved two senior high schools in the Minahasa region, with chemistry teachers serving as reviewers and students as trial users. Feasibility was evaluated by media experts, material experts, teachers, and students using five-point Likert-scale questionnaires, and the data were analyzed by converting scores into percentage-based feasibility criteria. Product feasibility was evaluated through validation by media experts, subject matter experts, chemistry teachers, and students using questionnaire instruments. The validation results indicated a very high level of feasibility, with scores of 91.7% from media experts, 96% from material experts, 92% from teachers, and student responses exceeding 93.99%, categorized as very good. These findings indicate that CHEMLIT meets technical, visual, and content feasibility standards and can serve as an alternative practicum tool for teaching electrolyte and non-electrolyte solutions, especially in schools with limited laboratory facilities. Its novelty lies in a portable sensor-based design that integrates quantitative conductivity measurement into conventional testing without complex digital systems.
Development of A Virtual Laboratory for Electrochem to Support Students' Critical Thinking Skills Rizki, M; Asyhar, Rayandra; Miharti, Isra; Zurweni; Ekaputra, Firdiawan
Hydrogen: Jurnal Kependidikan Kimia Vol. 14 No. 2 (2026): April 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v14i2.19708

Abstract

The application of interactive learning media plays an important role in stimulating motivation and deepening students' understanding, especially in bridging the characteristics of abstract chemistry learning, one of which is the material of electrolyte and non-electrolyte solutions. The main problem in chemistry learning in Madrasah Aliyah is the limited physical laboratory facilities, which impacts the low critical thinking skills of students. This study aims to develop a Virtual Laboratory "Electrochem Lab" that supports critical thinking skills and to test its feasibility conceptually and practically. As a supporting instrument, Electrochem Lab is equipped with an evaluation feature in the form of a quiz consisting of 5 questions based on Higher Order Thinking Skills (HOTS) that have been adjusted to train students' critical thinking skills independently. The study adopts a Research and Development (R&D) framework, specifically following the Lee & Owens model, which progresses through phases of analysis, design, development, implementation, and evaluation. The experimental subjects involved two experts (materials and media), one chemistry teacher, and 13 students of grade XI IPA MAN 5 Batang Hari consisting of 3 students in one-to-one tests with heterogeneous cognitive representations and 10 students in small group tests. The data collection instrument used a Likert Scale questionnaire consisting of a media expert questionnaire and a material expert questionnaire, a student response questionnaire and a one-to-one trial instrument. Evidence of the validity of the instrument and product was obtained through expert assessments stating that the media was very suitable for testing. The results showed a feasibility percentage of 90% from media experts and 89.23% from material experts, both of which were considered very suitable. The practitioner's assessment (chemistry teacher) reached 94.55%, while the one-to-one test reached 86,6% and the small group trials reached 98% with a very good category. It can be concluded that the Android-based virtual laboratory "Electrochem Lab" is very suitable to be used as an innovative solution to bridge the understanding of abstract concepts through sub-microscopic visualization and support the training of students' critical thinking skills. The novelty of this research lies in the integration of a contextual approach in digital simulations that connect learning materials with the students' surroundings and the Madrasah Aliyah environment.
Cognitive and Emotional Engagement in Stoichiometry Learning: A Correlational Study Waviza; Erlina; Mayasari, Eni
Hydrogen: Jurnal Kependidikan Kimia Vol. 14 No. 2 (2026): April 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v14i2.19717

Abstract

The purpose of this study was to measure the strength of the relationship between students’ cognitive and emotional engagement in stoichiometry learning. This research employed a descriptive quantitative approach, including descriptive analysis and correlational analysis. The participants consisted of 70 eleventh-grade students enrolled in the science-track chemistry course, drawn from two classes: Grade XI Chemistry 1 and Grade XI Chemistry 2. Data were collected using a four-point Likert-scale questionnaire measuring cognitive and emotional engagement, as well as through observations, semi-structured interviews, and documentation. The results showed that: (1) students’ cognitive engagement was categorized as very high (13%), high (34%), low (43%), and very low (10%); (2) students’ emotional engagement was categorized as very high (20%), high (16%), low (53%), and very low (11%); (3) the correlation test between cognitive and emotional engagement was significant (0.000 < 0.05), indicating a positive relationship; and (4) the strength of the relationship between cognitive and emotional engagement, as indicated by Spearman’s rho, was 0.447, which represents a moderate level of correlation. Therefor, higher cognitive engagement is associated with higher emotional engagement, and vice versa.
Correlation between Metacognitive Awareness and Students’ Self-Efficacy in Chemistry Learning among Grade XII Students Tsani, Mutiara; Erlina; Mayasari, Eni
Hydrogen: Jurnal Kependidikan Kimia Vol. 14 No. 2 (2026): April 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v14i2.19718

Abstract

This study aims to identify the relationship between metacognitive awareness and students’ self-efficacy in chemistry learning among grade XII students at MAN Pontianak. This research employed a quantitative approach with a descriptive correlational design involving 36 students selected through purposive sampling. The instruments used were the Metacognitive Awareness Inventory (MAI) questionnaire and a self-efficacy questionnaire, both of which had been validated and tested for reliability. Data were analyzed using descriptive statistics and the Pearson Product-Moment correlation test. The results showed that students’ metacognitive awareness was predominantly in the very well-developed category (66.7%), while self-efficacy was classified as very high (91.7%). The correlation analysis revealed a positive but weak and statistically insignificant relationship between metacognitive awareness and self-efficacy (r = 0.249; p = 0.144 > 0.05). These findings indicate that although both variables are at high levels, metacognitive awareness does not necessarily predict students’ self-efficacy in chemistry learning. This study contributes to the understanding of the complex interaction between cognitive and affective factors in chemistry education. Practically, the results suggest that teachers should not only develop students’ metacognitive skills but also implement instructional strategies that explicitly strengthen self-efficacy, such as providing mastery experiences, constructive feedback, and problem-based learning environments.
The Effect of Implementing the Practicum Method on Students' Learning Motivation in Reaction Rate Material Hariono, Seto; Enawaty, Eny; Sahputra, Rachmat
Hydrogen: Jurnal Kependidikan Kimia Vol. 14 No. 2 (2026): April 2026
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v14i2.19750

Abstract

This study aims to determine the effect of the application of the practicum method on student learning motivation in the reaction rate material of class XI of SMA Negeri 11 Pontianak. This study uses a quantitative approach with a quasi-experimental design with a one group pretest–posttest design model. The research sample consisted of 36 students of class XI Chemistry 2 who were selected using the purposive sampling technique. Data collection was carried out using a learning motivation questionnaire consisting of 25 statements on a Likert scale. Data analysis included normality test, homogeneity test, Wilcoxon test, and N-Gain calculation. The results showed that the average student learning motivation increased from 61.02% (high category) before treatment to 87.36% (very high category) after the application of the practicum method. The increase occurred in all indicators of learning motivation with an increase of 23.77% to 30.19%. The results of statistical tests also showed a significant difference between learning motivation before and after treatment. These findings show that practicum activities not only increase students' motivation to learn, but also help students understand the concept of reaction rate more concretely through hands-on experience. The implication of this study is that the practicum method can be an effective learning strategy to increase student engagement, strengthen the understanding of abstract chemistry concepts, and create more active and meaningful learning in the classroom.

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