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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 685 Documents
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Project-Based Learning in Basic Chemistry Practice: Its Impact on Vocational Students’ Analytical Abilities Munawan, Amro Hafiz; Dewi, Citra Ayu; Suryati
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.v14i2.19771

Abstract

Vocational chemistry education is expected to develop not only procedural competence but also higher-order analytical abilities aligned with industrial demands. However, Basic Chemistry Practice in vocational high schools is often dominated by teacher-centered instruction, limiting students’ capacity to interpret experimental data and connect theory with practice. This study aimed to examine the impact of Project-Based Learning (PjBL) on vocational students’ analytical abilities and to explore students’ and teachers’ perceptions of its implementation. A quantitative pre-experimental design using a one-group pretest–posttest model was employed. The participants were 34 Grade X Industrial Chemical Engineering students at a vocational high school. Analytical ability was measured using HOTS-based open-ended questions aligned with Bloom’s revised taxonomy, and perception data were collected through Likert-scale questionnaires. Statistical analysis included the Shapiro–Wilk normality test, paired sample t-test, and normalized gain (N-gain) analysis. The results showed a significant improvement in analytical ability, with the mean score increasing from 41.0 to 73.5 (p < 0.001) and an N-gain value of 0.55, categorized as moderate. Students and teachers reported highly positive perceptions, particularly regarding engagement, collaboration, and analytical skill development. These findings suggest that PjBL provides an effective pedagogical framework for strengthening analytical competence in vocational chemistry practice. The novelty of this study lies in the integration of HOTS-based assessment into authentic vocational chemistry projects within a PjBL framework, an approach that is still rarely reported in vocational chemistry education. By combining learner-centered project implementation with structured higher-order thinking assessment, this study offers a practical and context-relevant model for improving analytical competence in vocational education settings.
Development of a STEM-Based Activity Sheet to Train Critical Thinking in Reaction Rates Agustin, Ardianti Dwi; Yonata, Berta
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.v14i2.19898

Abstract

This study aims to develop a feasible STEM-based Student Activity Sheet on reaction rate material to train students’ critical thinking skills, based on aspects of validity, practicality, and effectiveness. The research employed a Research and Development (R&D) method using 4D model, which encompasses four sequential phases: define, design, develop, and disseminate. However, the implementation of this study is confined to the develop stage. The product was validated by two chemistry education experts and one chemistry teacher to assess content and construct validity. The practicality was evaluated through student response questionnaires and observation sheets, while its effectiveness was measured using pretest and posttest scores of critical thinking skills and learning outcomes analyzed through the N-Gain formula. The validation results showed a mode score of 4, which in valid category. The practicality test yielded a score of 92% from student responses and 97% from observation results, categorized as very practical. The effectiveness analysis demonstrated that most students achieved high N-Gain scores (g ≥ 0.7) in critical thinking indicators, with a significant improvement in learning outcomes from an average pretest score of 63 to a posttest score of 85. These findings indicate that the developed STEM-based LAPD is valid, practical, and effective to train students’ critical thinking skills on reaction rate material.
Development and Effectiveness of a Canva-Based Problem-Based Learning E-Module Using the 4D Model to Improve Students’ Understanding of Molecular Shapes Ndruru, Ester; Susanti, Nora; Lumbantobing, Jhonatan Ariski
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.v14i2.19963

Abstract

This study aims to develop and evaluate the effectiveness of a Canva-based e-module using the Problem-Based Learning (PBL) approach to improve students’ understanding of molecular shapes. The research employed a Research and Development (R&D) method using the 4D model (define, design, develop, disseminate). The effectiveness test applied a one-group pretest–posttest design involving 35 tenth-grade students at SMA Negeri 2 Medan selected through purposive sampling. The research instrument consisted of a multiple-choice test that was validated and tested for reliability (KR-20 = 0.811). Data analysis techniques included normality test, paired sample t-test, and N-gain analysis. The validation results showed that the e-module was highly feasible, with scores of 90.56% from media experts and 89.38% from material experts. The paired t-test results indicated a significant difference between pretest and posttest scores (p < 0.05), supported by an N-gain value of 0.76 (high category). These findings indicate that the Canva-based PBL e-module is both feasible and statistically effective in improving students’ understanding of molecular shapes.
The Effect of Spiritually Integrated Chemistry Learning on Learning Outcomes Moderated by Spiritual Quotient (SQ) Levels Zahra, Andini; Darmana, Ayi; Yesa, Denada Septiani
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.v14i2.19980

Abstract

Indonesian students' science performance remains low based on PISA 2022 results, particularly in abstract chemistry concepts such as acid-base. This study aims to analyze the effect of chemistry learning integrated with spiritual values on students' learning outcomes moderated by Spiritual Quotient (SQ) levels. A quasi-experimental method with a 2 × 2 factorial design was employed, involving 60 eleventh-grade students selected through purposive sampling. The experimental class (n = 30) applied Problem Based Learning (PBL) integrated with seven spiritual values (awareness, elegance, meaningfulness, transcendence, truth, peace, wisdom) through motivation, reflection, and contemplation, while the control class (n = 30) used PBL without spiritual values integration. Data were collected using a 20-item multiple-choice test (KR-20 = 0.95) and a 19-item SQ questionnaire adapted from Indaty N. (2022) based on Zohar and Marshall's (2000) theory (Cronbach's alpha = 0.872). Two-Way ANOVA results revealed that spiritually integrated chemistry learning significantly improved learning outcomes (F = 25.697, p = 0.000). SQ level also significantly influenced learning outcomes (F = 46.060, p = 0.001). However, no significant interaction was found between learning model and SQ level (p = 0.224), indicating that both variables independently affect learning outcomes. Low SQ students in the experimental class (M = 81.79) achieved scores comparable to high SQ students in the control class (M = 85.00), suggesting that spiritual values integration can compensate for lower SQ levels. State of novelty in this study concludes that integrating spiritual values into chemistry learning enhances academic achievement and supports holistic education by connecting scientific concepts with students' life values.
Development of Genially Based Learning Media based on Computational Chemistry on The Subject of Chemical Bonding of 11th Grade High School Hutagalung, Devi Patricia; Ramadhani, Dinda Suci; Nugraha, Asep Wahyu
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.v14i2.19994

Abstract

This study aims to develop and assess the feasibility level of Genially-based interactive learning media that integrates computational chemistry into chemical bonding materials. The media is designed to be able to display a more concrete visualization of molecular structures, so that it can help students understand abstract concepts. This research is included in the type of Research and Development (R&D) with reference to the ADDIE development model. The instruments used include media validation sheets and material validation sheets that are prepared based on the standards of the National Education Standards Agency (BSNP) and assessed by experts, as well as questionnaires to find out student responses. The results of the needs analysis at SMA Negeri 13 Medan show that the use of technology by teachers in learning is still not optimal, so students tend to feel less interested and have difficulty understanding the material. Based on these conditions, Genially learning media based on computational chemistry on chemical bonding materials was developed as a solution to support students' learning needs. The validation results showed that the developed media obtained an average feasibility percentage of 92% from media experts and 89% from material experts. Meanwhile, student response to this media reached an average of 87%. The final product of this research is in the form of interactive digital learning media. Thus, it can be concluded that Genially's learning media based on computational chemistry on chemical bonding materials is included in the category of being very feasible to be used in the learning process.
Effect of Genially-Based Computational Chemistry Media on Students’ Motivation and Learning Outcomes in Chemical Bonding Ramadhani, Dinda Suci; Hutagalung, Devi Patricia; Nugraha, Asep Wahyu
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.v14i2.20048

Abstract

This study was motivated by the low level of students’ motivation and learning outcomes in chemical bonding material at SMA Negeri 13 Medan, as indicated by low participation, limited conceptual understanding, and many students not achieving the minimum learning criteria. This study aimed to examine the effect of Genially-based computational chemistry media on students’ learning outcomes and to describe students’ learning motivation after its implementation. This research employed a quasi-experimental method with a pretest–posttest control group design. The sample consisted of 70 students, divided into an experimental class (n = 35) and a control class (n = 35). The experimental class was taught using Genially-based computational chemistry media integrated with discovery learning, while the control class used discovery learning without the media. The data were analyzed using N-gain and an independent sample t-test. The results showed that the experimental class achieved a higher increase in learning outcomes (N-gain = 0.72, high category) compared to the control class (N-gain = 0.63, medium category). The hypothesis test indicated a statistically significant difference between the two groups (t (68) = 3.74, p < 0.05). In addition, students’ learning motivation in the experimental class was categorized as high (81%). In conclusion, Genially-based computational chemistry media has a significant effect on improving students’ learning outcomes and positively contributes to students’ learning motivation. Therefore, this media can be used as an innovative alternative in chemistry learning, particularly for abstract topics such as chemical bonding.
Promoting Multiple Representation in the TPACK Framework to Clarify the Acid-Base Species Problem-Solving Mu'minah, Qonita; Mulyani, Sri
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.v14i2.20178

Abstract

Oversimplifying chemical concepts to explain the invisible part is frequent in the concept of acid-base species determination. During school time, teachers frequently drill students to use straightforward formulas to prevent time-consuming calculations in calculating pH values. This attitude contributes to misleading problem-solving even among twenty-three preservice teachers at one of the educational universities in West Java, Indonesia. Therefore, the lecturer developed a learning strategy that uses the TPACK framework and multiple representations to clarify the misleading and prepare chemistry preservice teachers to overcome similar challenges in real-world situations. The multiple representations and misconceptions analysis was assigned to determine a suitable pedagogical strategy and identify appropriate technology. Quantitative assessments were used to measure changes in problem-solving approaches. It discovers that they have an excellent understanding of solving the acid-base problems using the conceptual approach, with increasing: 13.0% to 60.9% and 43.4% to 56.5%.  However, some mathematical issues appear if the conditions are related to more complex acid-base scenarios, such as those related to buffer and hydrolysis regions. It is shown that the percentage of the conceptual approach usage decreases or remains constant: 69.6% to 45.7% and 43.4%, respectively. This shows that the symbolic level in chemistry learning is also linked to mathematical skills. As a consequence, chemistry preservice teachers must have a strong mathematical basic skills to solve problems correctly. Further study is also recommended in other chemistry subjects to get a broader view.
Quality Analysis Of Fermented Virgin Coconut Oil (VCO) By Purication Using Silica Slag Nickel By Filtration Budiman, Nadyra; Harimu, La; Rahmanpiu
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.v14i2.20189

Abstract

This study has been conducted on Quality Analysis of Fermented Virgin Coconut Oil (VCO) with Purification using Nickel Silica Slag by Filtration. This study aims to describe the physical, organoleptic and chemical qualities of fermented VCO purified with nickel silica slag. The results showed that the VCO result value obtained was 9.33% (v/v), with the organoleptic test of Fermentation VCO before and after filtration, namely colors 3.93 and 4; smells 3.20 and 3.27, and tastes 2.80 and 2.80. Determination of the physical quality of Fermented VCO with clarity values before and after respectively, Transmission 90.0% and 92.0%. Determination of the chemical quality of Fermented VCO before and after Filtration, namely the moisture content value of 0.31% and 0.08%, respectively; the value of free fatty acid content is 0.17% and 0.15%; The peroxide values were 0.53 mg eq/kg and 0.52 mg eq/kg, and the saponification values were 189.16 mg KOH/g and 249.30 mg KOH/g. The results of the chemical quality analysis in this study are in accordance with SNI No. 7381 of 2008 and SNI No. 7431 of 2015. Therefore, it can be concluded that VCO absorbed using nickel silica slag can improve its physical and chemical qualities.
Photocatalytic Degradation of Crystal Violet Using Cufe₂O₄ in a Heterogeneous Photo-Fenton System with Ascorbic Acid Rahmanisa, Apri; Dewata, Indang; Mawardi; Away, Romy Dwipa Yamesa
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.v14i2.20190

Abstract

Crystal violet is a persistent dye that is difficult to remove using conventional treatment methods. This study investigates the degradation of crystal violet using a CuFe₂O₄-based heterogeneous photo-Fenton system in the presence of ascorbic acid. The novelty of this work lies in the combined use of CuFe₂O₄ and ascorbic acid to enhance redox cycling and improve degradation performance under photo-Fenton conditions. The CuFe₂O₄ catalyst was synthesized via a sol–gel method and characterized using Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD), confirming the formation of a spinel structure with an average crystallite size of 38.4 nm. The degradation process was evaluated by varying pH (1–9) and hydrogen peroxide (H₂O₂) concentration (10–50 mmol/L). The optimum pH was found to be 3, achieving a degradation efficiency of 94.38%, while the optimum H₂O₂ concentration was 30 mmol/L with a degradation efficiency of 93.56%.The improved degradation performance is attributed to enhanced hydroxyl radical (•OH) generation facilitated by the interaction between CuFe₂O₄ and ascorbic acid. These results suggest that CuFe₂O₄ with ascorbic acid can improve crystal violet degradation under the tested photo-Fenton conditions.
Degradation of Methylene Blue by a Photo-Fenton System Based on Copper Ferrite Catalyst and Ascorbic Acid Nuzula, Adika; Dewata, Indang; Kurniawati, Desy; Effendi, Jon
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.v14i2.20202

Abstract

Water pollution caused by methylene blue is difficult to treat due to its stability and resistance to conventional methods. This study aims to evaluate the performance of a CuFe₂O₄-based photo-fenton system enhanced with ascorbic acid. The catalyst was synthesized using the sol–gel method and characterized by FTIR and XRD. Degradation experiments were carried out under UV irradiation (5 W) by varying pH (1–9) and H₂O₂ concentration (1.5–15 mmol/L). Methylene blue concentration was measured using a UV–Vis spectrophotometer at a wavelength of 664 nm. The results show that degradation efficiency reached 98.48% at pH 3 and 10 mmol/L H₂O₂. This condition promotes efficient Fe²⁺ activation of H₂O₂ to generate hydroxyl radicals (•OH), while ascorbic acid accelerates the reduction of Fe³⁺ to Fe²⁺, sustaining the redox cycle and increasing radical availability. These findings demonstrate that the system is effective and has strong potential for wastewater treatment.

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