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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 207 Documents
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Profile of Computational Thinking Skills of Pre-Service Chemistry Teachers Langitasari, Indah; Mudzakir, Ahmad; Sunyono, Sunyono; Nugraha, Asep Wahyu
EduChemia: Jurnal Kimia dan Pendidikan Vol 9, No 2 (2024)
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.v9i2.29554

Abstract

This study aims to analyze the computational thinking (CT) skills of pre-service chemistry teachers using a set of twelve test items adapted from the international CT Bebras Challenge. The items represent three difficulty levels: easy, medium, and hard. The CT components assessed include algorithmic thinking, abstraction, and pattern recognition. A descriptive quantitative method was employed, involving students from a chemistry teacher education program. The responses were scored and analyzed using descriptive statistics to identify trends in students’ CT performance across components and difficulty levels. The results show varied levels of proficiency, with higher performance in pattern recognition tasks and lower performance in algorithmic thinking. These findings highlight the importance of embedding CT skill development in chemistry education and teacher training curricula.
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.
Smart-Coating Corrosion Inhibitor for Carbon Steel Using LDH Modified with Laundry Detergent Waste Irmayanti, Dwi; Jamilah, Badrotul; Agustin, Ardianti Dwi; Fitria, Maulida Rizki; Wijayanto, Herry
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.v10i1.29560

Abstract

This research was conducted with the aim of reducing environmentally harmful detergent waste while utilizing its anionic surfactant content for the development of Zn-Al LDH composites with benzimidazole as a smart corrosion inhibitor for low-carbon steel, providing dual protection. The samples used in this research included detergent waste collected from commercial laundry services in the Ketintang area of Surabaya, commercial detergent, dodecylbenzenesulfonate, and pure Zn-Al LDH. The methodology involves the synthesis of Zn-Al LDH followed by characterization using FTIR, XRD, and TGA. The results indicate that the thermal decomposition profiles of Zn-Al LDH intercalated with commercial detergent, detergent waste, and dodecylbenzenesulfonate confirm that Zn-Al LDH can be modified with laundry waste. Additionally, interactions between Zn-Al LDH and benzimidazole enhance the crystalline structure of Zn-Al LDH, improving its quality as an anticorrosion material. Quantitative corrosion rate analysis using the weight loss method revealed that the Zn-Al LDH–dodecylbenzenesulfonate–benzimidazole sample exhibited the highest corrosion resistance, followed by the Zn-Al LDH–commercial detergent–benzimidazole, Zn-Al LDH–pure–benzimidazole, and Zn-Al LDH–detergent waste–benzimidazole samples. Overall, these findings support the feasibility of repurposing detergent waste as a functional additive for Zn-Al LDH-based corrosion inhibitors. Although not as effective as pure commercial surfactants, detergent waste provides environmental and functional benefits, reducing environmentally harmful and sustainable smart coatings for corrosion protection.
Identifying Students’ Understanding Levels and Sources of Misconceptions in Acid–Base Concepts Through a Five-Tier Diagnostic Test Sari, Sandi Danar Cynthia; Ardi, Triyanto; Parameswary, Clara Shabrina; Widiastuti, Nabila Lailil
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.v10i1.35563

Abstract

Identifying misconceptions experienced by students is an important step in understanding learning difficulties and designing more effective learning strategies. This study aims to analyze the level of understanding, misconceptions, and learning sources that cause students' misconceptions on acid-base material through the use of the Five-Tier Diagnostic Test. The results of the study show that 32.06% of students are in the sound understanding category, 25.44% in the partial understanding category, 7.21% have misconceptions, and 4.41% are in the not understanding category. The majority of students have understood the basic concepts of acids and bases, but many have only achieved partial understanding, which indicates partial comprehension without proper reasoning. Additionally, the analysis of the fifth tier, which identified the sources of misconceptions, revealed that 75.98% of misconceptions originated from personal thoughts, 14.95% from the internet, 9.06% from books, while teachers and other sources did not contribute (0.00%). The highest misconceptions were found in the subconcepts of pH and pOH, influenced by personal thoughts and daily experiences that do not align with scientific concepts. These findings confirm the effectiveness of the Five-Tier Diagnostic Test in revealing the details of students' understanding as well as the sources of misconceptions. Therefore, teachers need to utilize this instrument to design more targeted conceptual change-based learning strategies to reduce misconceptions in acid-base material.

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