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EduChemia: Jurnal Kimia dan Pendidikan
Published by Universitas Sultan Ageng Tirtayasa
ISSN : 25024778     EISSN : 25024787     DOI : http://dx.doi.org/10.30870/educhemia.v6i2.10412
Core Subject : Science, Education, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology
Focus and Scope Educhemia (Jurnal Kimia dan Pendidikan) is Periodicals published the results of research related to the development of science and technology in the field of Chemistry and Chemistry education as a form of intellectual property Chemistry: Organic chemistry, Inorganic chemistry, Biochemistry, Physical chemistry, Analytical Chemistry, Environmental Chemistry, Material chemistry, Ethnochemistry. Chemistry education: chemistry learning design and model, chemical education curricula, Technology innovation and media/multimedia in chemistry learning, development of evaluation tools, lesson study and classroom action research
Arjuna Subject : Kimia(semua kategori) - Kimia Organik
Articles 12 Documents
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Search results for , issue "Vol 10, No 1 (2025)" : 12 Documents clear
Synthesis of Biodiesel from Used Cooking Oil Using Composite Photocatalyst from Milkfish Bones And TiO2 Adiwibowo, Muhammad Triyogo; Wardalia, Wardalia; Kustiningsih, Indar; Daimah, Radhini Salma; Nugroho, Adhitiya Aprianto; Maemunah, Shiva; Alawiyah, Rizqi
EduChemia: Jurnal Kimia dan Pendidikan Vol 10, No 1 (2025)
Publisher : Department of Chemistr Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v10i1.29402

Abstract

The increasing number of vehicles in Indonesia has increased air pollution and fuel consumption. The fuels commonly used come from fossil, the availability of which is limited. One solution that can be applied is switching to alternative energy, such as biodiesel from vegetable oils, including used cooking oil. This study investigates the effect of reactant ratio, catalyst weight, UV exposure, and catalyst reusability on biodiesel yield and characteristics (density and viscosity) according to Indonesian national standards (SNI). The method used involves the impregnation of CaO catalysts with TiO2 photocatalysts and simultaneous transesterification-esterification reaction for biodiesel production, with oil to methanol molar ratios of 1:6, 1:9, and 1:12 and catalyst weights of 3, 5, and 7%. The results showed that the best product had a yield of 90.6%, a density of 882 kg/m³, and a viscosity of 2.45 mm2/s at a reactant ratio of 1:9 and a catalyst weight of 5%, with UV exposure for 4 hours at a temperature of 65°C. XRD and EDS analysis revealed the presence of CaO-TiO2 compounds in the synthesized photocatalyst, and the GCMS analysis shows that FAME (fatty acid methyl ester) content in the biodiesel is more than 96%.
Development of Merdeka Curriculum Teaching Modules for PjBL-Based Green Chemistry Learning Said, Umar; Zidny, Robby; Aisyah, Ratna Sari Siti
EduChemia: Jurnal Kimia dan Pendidikan Vol 10, No 1 (2025)
Publisher : Department of Chemistr Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v10i1.30716

Abstract

The world of Indonesian education, which is already experiencing a learning crisis, is increasingly affected by the Covid-19 pandemic. The government through the Indonesian Ministry of Education and Culture developed an merdeka curriculum to solve this problem. However, in its implementation, there are still many educators who have not been able to compile teaching modules for the merdeka curriculum. In fact, the learning process of the merdeka curriculum without teaching modules experiences material irregularities. This study aims to develop an “Merdeka Curriculum Teaching Module for PjBL-based Green Chemistry Learning”. The research design used is R&D with the ADDIE model. Literature study and questionnaire data collection techniques. The data analysis technique uses the Aiken's V 0.73 validation instrument on teaching module material and media validated by 10 validators. Teaching modules that were declared valid were tested on 43 student’s of class X SMAN. The results showed that the teaching module was proven valid with a material aspect validity value of 0.96 and a media aspect of 0.95 and obtained student response results with a value of 0.84% (including very good criteria). It can be concluded that the teaching module developed is valid and feasible to use as a school teaching tool.
Effectiveness of Anti-Lice Shampoo from Lemongrass Stalk (Cymbopogon Citratus) Sjamsiah, Sjamsiah; Nurwahyuni, Nurwahyuni; Gani, Rahmiani
EduChemia: Jurnal Kimia dan Pendidikan Vol 10, No 1 (2025)
Publisher : Department of Chemistr Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v10i1.30603

Abstract

Head lice (Pediculus humanus capitis) are ectoparasites that attack the human head, causing excessive itching. To overcome this problem, shampoo with active substances from natural sources can be used, namely, kitchen lemongrass (Cymbopogon citratus). This study was designed to determine the effects of various concentrations of lemongrass stalk extract and the optimal concentration of the anti-head lice shampoo on head louse mortality. The results of the phytochemical screening revealed that the lemongrass stalk extract contains flavonoids, tannins, terpenoids, saponins and alkaloids. Lemongrass stalk extract can be used as a shampoo formulation with several concentrations ranging from 3%, 5%, 7% and 9%. The characteristic results revealed a thick liquid, homogeneous, brown to blackish brown color, a characteristic smell of the lemongrass stalk, a foam height range of approximately 6–5 cm, a pH range of approximately 5–6, and a viscosity range of approximately 100–5700 cP. The optimum concentrations that can kill head lice effectively and meet the SNI requirements for an adequate and safe shampoo to use are shampoo at concentrations of 5% and 7%.
AI-Powered Automated Assessment: Aiken Index Analysis of Content Validity Scientific Literacy Asesment Putri, Bela Anisa; Yamtinah, Sri; Shidiq, Ari Syahidul; Widarti, Hayuni Retno; Wiyarsi, Antuni
EduChemia: Jurnal Kimia dan Pendidikan Vol 10, No 1 (2025)
Publisher : Department of Chemistr Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v10i1.30640

Abstract

This study aims to analyze the content validity of the Scientific Literacy Asesment (SLA) instrument, which integrates ethnochemistry based on artificial intelligence through expert agreement based on the Aiken index so that the instrument can measure what should be measured. The research method used is a qualitative descriptive method based on the results of content validity calculated through the Aiken formula. Content validity data were obtained from 10 experts, namely, chemistry education lecturers from UNS, UNY, and UM and high school chemistry teachers in Surakarta, through focus group discussions (FGDs). Content validity is assessed by a score of 1 – 4, namely, irrelevant (TR) with a score of 1; less relevant (KR) with a score of 2; quite relevant (CR) with a score of 3; and relevant (R) with a score of 4 for each question item with aspects measured, namely, aspects of content, language, and construct.  Based on the calculation, 15 questions were declared valid with an Aiken index value ≥ 0.73.
Phosphate Accumulation Using MgO-Fe3O4/Agarose/Oxalic Acid Gel as a Diffusive Gradient in Thin Films (DGT) Binding Layer Dinira, Layta; Rafif, Sullahudin Ahmad; Ulayya, Salwa; Rumhayati, Barlah; Darjito, Darjito; Sabarudin, Akhmad
EduChemia: Jurnal Kimia dan Pendidikan Vol 10, No 1 (2025)
Publisher : Department of Chemistr Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v10i1.29113

Abstract

Monitoring phosphate concentration in waters is critical because excessive phosphate can lead to the death of aquatic organisms. Phosphate can be monitored via a passive sampler called Diffusion Gradient in Thin Films (DGT). This study combines MgO and Fe3O4 impregnated in agarose crosslinked with oxalic acid to accumulate phosphate from the solution as a DGT binding gel. The parameters observed in this study were MgO/Fe3O4 mass ratio (1:3, 1:1, 3:1), accumulation time (20, 40, 60, 120, 240, and 1440 min), phosphate concentration (0.2, 0.4, 0.6, 0.8, and 1 mg/L) and pH (4, 5, 6, 7, and 8) on phosphate accumulation. XRD pattern confirmed that the adsorbents used were MgO and Fe3O4. SEM analysis showed that the gel had an average pore size of 31.78 μm, and the adsorbents were evenly distributed. Gel with MgO/Fe3O4 mass ratio 3:1 can adsorb phosphate up to 97.19 ± 0.36%. The phosphate accumulation reached optimum after a minimum adsorption time of 4 hours and when the phosphate concentration in the solution was 0.4 mg/L. The solution's pH had no significant effect on phosphate accumulation. This study shows that MgO-Fe3O4/agarose/oxalic acid gel is an excellent binding gel to accumulate phosphate from water.
Estimation of Students' Chemistry Ability Based on Dichotomous and Polytomous Data Kriswantoro, Kriswantoro; Wulandari, Lucya; AJ, Suharli
EduChemia: Jurnal Kimia dan Pendidikan Vol 10, No 1 (2025)
Publisher : Department of Chemistr Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v10i1.31224

Abstract

This research aims to evaluate the quality of an instrument used to measure the chemistry proficiency of senior high school students in Yogyakarta city in response to high order thinking test questions. The evaluation employs the item response theory (IRT) approach, which considers both dichotomous and polytomous data types. The assessment involved analyzing three fundamental assumptions: unidimensionality, local independence, and invariance. The unidimensionality assumption was examined through factor analysis, revealing that the first factor contributed the most to both dichotomous and polytomous data. Local independence was tested using variance-covariance matrix analysis, which revealed that the covariance values between ability intervals were minimal or nearly zero, thereby fulfilling this assumption. Furthermore, invariance testing was conducted on both item parameters and student ability parameters. The results indicated a high correlation (0.893) for item parameters and a moderate correlation (0.761) for ability parameters, confirming that the invariance assumption was satisfied. The students’ ability levels were categorized into five levels, ranging from very low to very high. The analysis revealed that dichotomous data covered a broader range of abilities than polytomous data did. Overall, the study confirms that the instrument used is valid, reliable, and aligns with the core assumptions of IRT. These findings have significant implications for enhancing the quality of chemistry assessment tools using the IRT approach, ensuring that test questions are more accurate and dependable. These insights can help teachers design instructional methods that promote higher-order thinking skills (HOTSs), encourage the broader application of IRT in assessment, and support data-driven educational policies. Moreover, students gain improved training in analytical thinking and problem solving, leading to a deeper understanding of chemistry.
Structure and Properties of α-Fe2O3 Based on Natural Iron Sand through Low-Temperature Process as an Adsorbent of Metal Ion Mn Indrawati, Wiwik; Simbolon, Silviana; Apadi, Mochammad Rizky; Prijono, Kusdi; Nugroho, Edo Prasetyo; Yunus, Muhammad
EduChemia: Jurnal Kimia dan Pendidikan Vol 10, No 1 (2025)
Publisher : Department of Chemistr Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v10i1.30761

Abstract

One of the countermeasures against heavy metal environmental pollution is through an adsorption process utilizing nanoparticle technology, one of which uses hematite (α-Fe2O3) nanoparticles. In this study, the manufacture of α-Fe2O3 nanoparticles derived from natural iron sand through the process of precipitation as adsorbent of the heavy metal manganese (Mn) was carried out. The variable used is the temperature of the coprecipitation process in the range of 60–80°C. Furthermore, characterization and adsorptivity tests of α-Fe2O3 nanoparticles against the heavy metal ion Mn were carried out. The synthesized α-Fe2O3 was characterized in terms of phase using XRD, morphological structure using SEM‒EDS, density using pycnometer and adsorption using AAS. The results obtained from XRD show that α-Fe2O3 crystallizes well in the (104) plane at the 2θ region of 35.612° and has the smallest crystal diameter of 3.03760 nm at 60°C. SEM revealed that there was still agglomeration in the results and a particle size distribution of 62 nm at 60°C. The density results revealed the highest value at 80°C, with a value of 30 g/cm3. However, the manganese (Mn) adsorption results revealed the optimal conditions for the value of the Mn content adsorbed at 70°C, namely, 2176 µ/g.
Content Validity of Assessment Instrument and Storyboard Two-Tier Virtual Reality (TTVR) in Acid Base Material Astuti, Yuli; Yamtinah, Sri; Saputro, Sulistyo; Shidiq, Ari Syahidul; Sudarmin, Sudarmin; Rahayu, Sri
EduChemia: Jurnal Kimia dan Pendidikan Vol 10, No 1 (2025)
Publisher : Department of Chemistr Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v10i1.33166

Abstract

The aim of this research is to analyze the content validity of the TTVR assessment instrument for acid‒base materials based on the Aiken validity index. This ensures that the instrument can effectively measure what it intends to assess. Content validity data were obtained from seven experts, including two chemistry education lecturers from UNS and five high school teachers in Surakarta. The content validity test used a 1‒4 rating scale, with categories defined as follows: relevant with a score of 4; less relevant with a score of 3; irrelevant with a score of 2; and quite relevant with a score of 1. This scale was applied to 15 instrument questions and 16 storyboard indicators related to media and material aspects. The development results of the TTVR assessment instrument for acid‒base content achieved an Aiken index of over 0.76, indicating that the instrument is valid. This suggests that the TTVR assessment instrument and storyboard are suitable, with improvements made based on suggestions and feedback from experts.
The Effect of PjBL-STEM Integrated with Green Chemistry Principles on Enhancing Creative Thinking Skills and Environmental Literacy Wahyudi, Haekal; Gani, Abdul; Syukri, Muhammad; Fazli, Rahmad Rizki; Safrijal, Safrijal
EduChemia: Jurnal Kimia dan Pendidikan Vol 10, No 1 (2025)
Publisher : Department of Chemistr Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v10i1.32815

Abstract

The demands of 21st-century competition require several fundamental competencies, one of which is creativity. Additionally, the affective domain, particularly environmental awareness, has received increasing international attention. This study aims to examine the effect of implementing PjBL-STEM integrated with green chemistry principles in enhancing students' creative thinking skills and environmental literacy. The research employed a quasi-experimental design with a nonequivalent control group approach involving 10th-grade students at SMAN 1 Baitussalam. Class X IPAS 1 served as the experimental group, whereas Class X IPAS 2 served as the control group. The research instruments included validated learning material evaluation sheets, creative thinking skills test items, and environmental literacy comprehension tests, all of which were reviewed by experts and analyzed empirically. The data analysis techniques involved N-Gain tests and independent sample t tests with a significance level of 0.05. The hypothesis testing results revealed significant N-Gain scores for both creative thinking skills and environmental literacy (p < 0.001). These findings indicate a significant difference in the improvement of creative thinking skills and environmental literacy understanding between the experimental and control groups following the implementation of the PjBL-STEM model integrated with green chemistry principles.
Identification and Antibacterial Activity of Bioactive Compounds Extracted from Gading Coconut (Cocos nucifera var. eburnea) Leaf Hasanah, Uswatun; Mulyati, Ade Heri; Riyadi, Sandra Amalia; Pita, Lusia Magdalenis
EduChemia: Jurnal Kimia dan Pendidikan Vol 10, No 1 (2025)
Publisher : Department of Chemistr Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/educhemia.v10i1.31974

Abstract

Traditional medicine continues to play a vital role in Indonesia’s healthcare landscape, with increasing reliance on plant-derived remedies for disease prevention and treatment. Among these, the gading coconut (Cocos nucifera var. eburnea), native to Bogor, Indonesia, presents untapped potential as a source of antibacterial agents. This study aimed to identify bioactive compounds with antibacterial activity from gading coconut leaves and to evaluate the impact of extraction methods—maceration and sonication—on their yield and efficacy. Compared with maceration (5.92%), sonication produced a significantly greater extract yield (9.48%). Phytochemical screening confirmed the presence of alkaloids, flavonoids, and tannins in both extracts. Quantitative analysis revealed that the sonicated extract contained greater concentrations of total flavonoids (52.06 mg QE/g) and total phenolics (147.10 mg GAE/g). Chemical profiling using liquid chromatography‒tandem mass spectrometry (LC‒MS/MS) identified key antibacterial constituents, including 3-hydroxycoumarin, isoorientin, vitexin, and α-linolenic acid. Biological evaluation demonstrated that the sonicated extract exhibited stronger antibacterial activity, with minimum inhibitory concentrations (MICs) of 50 mg/mL against Escherichia coli and 25 mg/mL against Staphylococcus aureus. These findings suggest that the extraction method significantly influences both the chemical composition and antibacterial potency of gading coconut leaf extracts. Overall, this study highlights the pharmacological relevance of C. nucifera var. eburnea as a promising source of natural antibacterial agents and contributes to the scientific validation of traditional medicinal plants in Indonesia.

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