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All Journal JURNAL PENGABDIAN KEPADA MASYARAKAT Lantanida Journal Science Midwifery Indonesian Journal of Chemical Science and Technology Hydrogen: Jurnal Kependidikan Kimia KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Jurnal Nasional Holistic Science CHEDS: Journal of Chemistry, Education, and Science JUrnal Riset Ilmu Pendidikan Reflection Journal Chemedu: Jurnal Ilmiah Pendidikan Kimia Journal of The Indonesian Society of Integrated Chemistry Indonesian Journal of Chemical Science J-PEK (Jurnal Pembelajaran Kimia)
Kurniawan, Ekin Dwi Arif
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Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Dentistry Education Energy Health Professions Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Nursing Physics Public Health Social Sciences Veterinary Other

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The Effect of Acids, Bases and Salts in Removing Rust Using the Electrolysis Method Kurniawan, Ekin Dwi Arif; Moondra Zubir; Alfira Julian Pratiwi; Rafidah Almira Samosir; Mutia Ardila; Agnes Aprilyani Br Silitonga; Anna Sakila; Dindy Louiza Pangaribuan; Geby Mai Irawan; Okta Miranda Samosir; Vivy Cintia Laudia Hutagaol
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 2 (2025): JULY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i2.68718

Abstract

Corrosion is a natural process of metal deterioration caused by chemical or electrochemical reactions with the surrounding environment, and it commonly occurs in iron and steel. This study examined the use of electrolysis as a simple method to reduce rust on iron surfaces by applying several electrolyte solutions. The solutions tested included sodium chloride, citric acid, acetic acid, sodium bicarbonate, and water, each at a concentration of 10%, while citric acid was also varied up to 100%. Electrolysis was performed for 10 to 30 minutes on both positive and negative poles. The findings showed that sodium chloride solution gave the highest effectiveness in rust removal, with 0.93% rust loss on the negative pole and 0.58% on the positive pole. Increasing solution concentration and treatment time further improved the rust removal rate, reaching 2.50% at 30 minutes.
Effect of Sugar, Salt, and Flavorings Addition on Temperature Changes and Specific Heat Capacity in Citric Acid, Acetic Acid, and Ascorbic Acid Solutions Alfira Julian Pratiwi; Ekin Dwi Arif Kurniawan; Rafidah Almira Samosir; Mutia Ardila; Gioni Thesia Boru Simbolon; Afrilia Tria Ivanka; Muhammad Fadhli; Tetra Tasya Anggraini Butar; Eren Nazura; Moondra Zubir; Abd Hakim S
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 2 (2025): JULY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i2.68735

Abstract

This study aims to evaluate the effect of the addition of additives in the form of sugar, salt, and flavorings on changes in temperature and type heat capacity in citric acid, acetic acid, and ascorbic acid solutions. The methodology used is a quantitative experimental approach with direct observation of temperature changes as well as calculation of enthalpy changes (ΔH) in various combinations of acidic and additive solutions. The results of the analysis showed that the types of additives exerted different effects on the thermal stability and heat capacity of each acidic solution. Sugars tend to provide the most optimal thermal stability with minimal fluctuations in ΔH change, while salts cause the greatest fluctuations. Flavorings show a more varied and inconsistent pattern of change. These findings provide in-depth insights into the thermal characteristics of organic acid solutions with additive modification, contributing to the development of applications in the fields of food, pharmaceutical, and applied chemistry education.
Influence of Cooking Temperature on the Moisture Content and Organoleptic Properties of Pineapple, Banana, and Dragon Fruit Jam Mutia Ardila; Rafidah Almira Samosir; Alfira Julian Pratiwi; Ekin Dwi Arif Kurniawan; Najwa Putri L. Nasution; Gresvita Sanova Turnip; Sari Mawaddah; Faizah A. Nasution; Feri P. Jahata Samosir; Moondra Zubir; Abd Hakim S
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 2 (2025): JULY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i2.68736

Abstract

Jam is a processed fruit product with high density and acidity, making it more stable than other fruit-based products. The jam-making process includes crushing the fruit, adding sugar, acid, thickening agents, and applying heat. Cooking temperature plays a critical role in determining the moisture content, texture, aroma, and taste of jam. This study investigates the influence of cooking temperature on the moisture content and organoleptic properties of pineapple (Ananas comosus), banana (Musa paradisiaca), and dragon fruit (Hylocereus spp.) jams. The jams were prepared by heating at various temperatures (900C, 1000C, 1100C), followed by moisture content measurement and organoleptic testing. Results showed that higher temperatures significantly reduced moisture content and enhanced sensory quality. Jams cooked at 110°C had the lowest moisture levels and the best organoleptic scores. These findings highlight the importance of temperature control in producing high-quality jam.
Influence of Temperature and Stirring Duration on the Solubility Kinetics of Palm Sugar (Arenga Pinnata) in Water: Implications for Food Processing Efficiency Rafidah Almira Samosir; Alfira Julian Pratiwi; Ekin Dwi Arif Kurniawan; Mutia Ardila; Trimutia Wulandari; Flia Arnesta Sipayung; Dira Rahma Cahya; Nove Briani Minar Sihombing; Einstenia Sirait; Moondra Zubir; Abd Hakim S
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 2 (2025): JULY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i2.68737

Abstract

Palm sugar (Arenga pinnata) is widely used in traditional and industrial food processing, where its solubility plays a crucial role in determining product consistency and efficiency. However, most previous studies have focused on the solubility of refined cane sugar, leaving limited understanding of how temperature and stirring conditions affect the dissolution behavior of palm sugar, which has a more complex composition. This study aims to examine the effect of temperature, solute mass, and stirring duration on the solubility of palm sugar in water. A laboratory-based experimental method was employed, varying temperature (50°C, 75°C, 100°C), sugar mass (20 g and 40 g), and stirring duration (1 and 2 minutes). In general, the findings indicate that higher temperature accelerates the dissolution rate, while greater solute mass extends dissolution time. These results confirm temperature as the dominant factor influencing dissolution kinetics. The implications of this study include improving household practices for faster sugar preparation, optimizing processing efficiency in small-scale food industries, and contributing to food science education by providing an applied example of solubility principles.
Integrating Virtual Laboratories in Chemistry Education: Vocational Students’ Responses to Cation Qualitative Analysis Samosir, Rafidah Almira; Ardila, Mutia; Pratiwi, Alfira Julian; Kurniawan, Ekin Dwi Arif; Ridho, Dimas
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 2 (2025): April 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i2.15432

Abstract

Research on student responses and the challenges of implementing virtual laboratories in qualitative cation analysis practicums within vocational pharmacy education remains limited. This study aims to explore student responses to the use of virtual laboratories as an alternative learning tool and to identify the challenges faced during its implementation. A qualitative approach with a case study method was employed. Data were collected through questionnaires and classroom observations during the learning process. The participants were 41 Grade XII students of the Pharmacy Program at SMK Galang Insan Mandiri Binjai, who engaged in virtual laboratory-based learning for qualitative cation analysis. The results indicate that virtual laboratories enhance student engagement and comprehension of the subject matter. Students responded positively to the use of virtual labs, reporting increased motivation and interest in developing technology-related skills. However, challenges such as limited digital literacy and infrastructure issues were also identified. The study suggests that virtual laboratories should be complemented with hands-on practicum sessions to provide a balanced and realistic learning experience. These findings offer valuable insights into the potential and limitations of virtual laboratory implementation in vocational pharmacy education.
General Chemistry Class Perspective On The Utilization Of Young Coconut water To Treat Fever Symptom Ridho, Dimas; Juwitaningsih, Tita; Samosir, Rafidah Almira; Pratiwi, Alfira Julian; Ardila, Mutia; Kurniawan, Ekin Dwi Arif; Sianipar, Mirna Wulan Sari; Alisya, Syalwa Nur; Br. Hutahuruk, Novitasari; Tafonao, Firman Satria
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 3 (2025): June 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i3.15819

Abstract

This study aims to analyze the perspectives of students from the Department of Mathematics enrolled in a General Chemistry class regarding the use of young coconut water as a natural remedy to treat fever symptoms. The research is grounded in the widespread trust of Indonesian society in herbal medicine, particularly young coconut water, which has been traditionally used across generations to treat various health conditions, including fever. Young coconut water is known to contain vital nutrients such as electrolytes (potassium, sodium, magnesium), B-complex vitamins, and vitamin C, which help lower body temperature naturally, especially during dehydration caused by fever. A quantitative approach with a descriptive survey method was employed. The data were collected using a closed questionnaire based on a Likert scale, which was tested for validity and reliability, achieving a Cronbach's Alpha value of 0.977-indicating a high level of reliability. Results showed that students' average scores in knowledge (3.90), understanding (3.81), attitude (3.89), and application (3.87) were all in the high category. This indicates that students not only understand the benefits of young coconut water but also grasp scientific concepts related to electrolyte function in fluid balance and immune response. Despite the high scores, some misconceptions persist. For example, a few students believe young coconut water can entirely replace medical treatment or that higher consumption leads to faster healing without regard for appropriate dosage. This highlights the need for improved science-based health literacy. The study concludes that continuous health education through lectures, seminars, and healthy campus campaigns integrating both traditional and medical approaches is essential. These findings are significant in promoting the wise and measurable use of natural remedies like young coconut water while avoiding misuse. Furthermore, the results can serve as a basis for future research, such as clinical trials or laboratory comparisons with other rehydration fluids, and can help develop health promotion policies in academic settings to encourage smart and healthy decision-making among students.
Difference Effect of Addition of Acetic Acid and Citric Acid on the Biodegradation Characteristics of Starch-Based Bioplastics Julian, Alfira; Rafidah Almira Samosir; Mutia Ardila; Ekin Dwi Arif Kurniawan
Indonesian Journal of Chemical Science Vol. 14 No. 3 (2025): Indonesian Journal of Chemical Science
Publisher : Prodi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v14i3.28455

Abstract

Bioplastik merupakan salah satu alternatif potensial untuk menggantikan plastik konvensional, karena sifatnya yang mudah terdegradasi sehingga lebih ramah lingkungan. Bioplastik dapat disintesis dari pati dan gliserol dengan penambahan asam organik. Penelitian ini bertujuan untuk menganalisis perbedaan pengaruh penambahan asam asetat dan asam sitrat terhadap laju degradasi bioplastik yang berpotensi digunakan sebagai bahan kemasan ramah lingkungan. Bioplastik dibuat menggunakan dua formulasi, yaitu: (1) pati, gliserol, dan asam asetat (cuka), serta (2) pati, gliserol, dan asam sitrat (jeruk nipis), dengan rasio komposisi 18:1,5:1,5 mL. Produk bioplastik yang dihasilkan kemudian diuji sifat biodegradabilitasnya melalui pengamatan selama tiga belas hari. Hasil penelitian menunjukkan bahwa kedua jenis bioplastik belum mengalami degradasi sempurna hingga hari ketiga belas. Namun, pertumbuhan jamur lebih banyak teramati pada bioplastik berbasis asam sitrat. Hal ini diduga berkaitan dengan tekstur bioplastik asam sitrat yang lebih lembap dibandingkan dengan bioplastik yang menggunakan asam asetat. Temuan ini mengindikasikan bahwa jenis asam yang digunakan dalam pembuatan bioplastik dapat mempengaruhi tingkat kelembapan dan pertumbuhan mikroorganisme selama proses degradasi.
Macromedia Flash 8: Learning Media to Enhance Students' Understanding of Chemical Bonding Haqqi Annazili Nasution; Syah Nurul Riswana; Ekin Dwi Arif Kurniawan
J-PEK (Jurnal Pembelajaran Kimia) Vol. 10 No. 1 (2025): J-PEK (JURNAL PEMBELAJARAN KIMIA)
Publisher : Department of Chemistry, Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aims to examine the effect of Macromedia Flash 8-based learning media on students’ learning outcomes in the topic of chemical bonding. The research employed a quasi-experimental design with a pretest-posttest control group, involving two randomly selected classes from a public secondary school in Medan. The experimental class was taught using interactive media developed with Macromedia Flash 8, while the control class received instruction using conventional PowerPoint-based methods. Both classes were instructed using the Discovery Learning model to ensure consistency in pedagogy. A multiple-choice test served as the research instrument and was administered to both groups as a pretest and a posttest. The collected data were analyzed using normality and homogeneity tests, N-Gain calculations, and a one-tailed t-test to determine statistical significance. The results indicated a significant improvement in students’ learning outcomes in the experimental class compared to the control class, based on the N-Gain value (0.64) compared to the control class (0.56). These findings suggest that using Macromedia Flash 8 enhances students’ conceptual understanding and engagement, particularly in abstract topics such as chemical bonding. The interactive animations and visual elements embedded in the media helped bridge the gap between microscopic chemical representations and student comprehension. Therefore, integrating multimedia learning tools in chemistry instruction can contribute to more effective teaching and improved student performance.References Akaygun, S., & Jones, L. L. (2014). How does level of guidance affect understanding when students use a dynamic simulation of liquid–vapor equilibrium? In Learning with understanding in the chemistry classroom (pp. 243–263). Springer. Al-Muqtafa, A. K. (2019). 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Strategi Pembelajaran Problem-Based Learning untuk Meningkatkan Literasi Sains Siswa pada Mata Pelajaran Kimia: Kajian Literatur Terkini Ardila, Mutia; Kurniawan, Ekin Dwi Arif; Pratiwi, Alfira Julian; Samosir, Rafidah Almira
ChemEdu Vol 7, No 1 (2026)
Publisher : Jurusan Kimia FMIPA UNM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/chemedu.v7i1.83560

Abstract

Pembelajaran abad ke-21 menuntut peserta didik memiliki kemampuan literasi sains yang memadai, khususnya dalam memahami materi kimia yang kompleks dan abstrak. Namun, hasil asesmen internasional menunjukkan bahwa kemampuan literasi sains siswa, termasuk di Indonesia, masih belum optimal. Penelitian ini bertujuan untuk menganalisis penerapan model Pembelajaran Berbasis Masalah (Problem Based Learning/PBL) dalam meningkatkan literasi sains pada pembelajaran kimia di tingkat Sekolah Menengah Atas (SMA/MA). Metode yang digunakan adalah Systematic Literature Review (SLR) dengan menganalisis artikel yang diterbitkan antara tahun 2018 hingga 2024. Berdasarkan hasil analisis diperoleh 13 artikel yang memenuhi kriteria inklusi untuk dianalisis. Hasil tinjauan menunjukkan bahwa penerapan PBL secara konsisten memperkuat pemahaman konsep sains secara mendalam dan meningkatkan keterampilan berpikir kritis serta pemecahan masalah siswa. Model pembelajaran ini tidak hanya mendukung prestasi akademik, tetapi juga membantu siswa mengaitkan ilmu yang dipelajari dengan situasi nyata, sehingga meningkatkan kualitas literasi sains yang dibutuhkan dalam pembelajaran kimia saat ini.
Pengembangan E-modul Berbasis Problem-Based Learning dan Pendekatan Deep Learning pada Materi Termokimia Sitinjak, Ezra Rohanauli; Pulungan, Ahmad Nasir; Dalimunthe, Makharany; Kurniawan, Ekin Dwi Arif; Pratiwi, Alfira Julian; Ardila, Mutia; Samosir, Rafidah Almira
Reflection Journal Vol. 6 No. 2 (2026): June
Publisher : Lembaga Penelitian dan Pemberdayaan Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/4rgcf177

Abstract

Penelitian ini bertujuan untuk mengembangkan e-modul pembelajaran kimia berbasis Problem-Based Learning (PBL) yang terintegrasi dengan pendekatan deep learning pada materi termokimia serta mengetahui tingkat kelayakan, kepraktisan, dan efektivitasnya. Penelitian ini merupakan penelitian pengembangan (Research and Development) dengan model 4D (Define, Design, Develop, Disseminate). Subjek penelitian adalah siswa kelas XI SMA Negeri 17 Medan tahun ajaran 2025/2026. Instrumen yang digunakan meliputi lembar validasi ahli, angket respon siswa, serta tes hasil belajar (pretest dan posttest). Hasil penelitian menunjukkan bahwa e-modul yang dikembangkan dinyatakan layak berdasarkan penilaian ahli materi dan ahli media. Tingkat kepraktisan e-modul tergolong baik berdasarkan respon siswa terhadap kemudahan penggunaan, tampilan, dan manfaat pembelajaran. Selain itu, e-modul terbukti efektif dalam meningkatkan hasil belajar siswa dengan nilai N-gain sebesar 0,71 yang termasuk dalam kategori tinggi. Dengan demikian, e-modul berbasis PBL dan pendekatan deep learning dapat digunakan sebagai bahan ajar yang inovatif untuk meningkatkan pemahaman konsep, keterlibatan, serta kemampuan berpikir kritis siswa pada materi termokimia. Development of an E-Module Based on Problem-Based Learning and a Deep Learning Approach in Thermochemistry This study aims to develop a chemistry e-module based on Problem Based Learning (PBL) integrated with a deep learning approach on thermochemistry material and to determine its validity, practicality, and effectiveness. This research employed a Research and Development (R&D) method using the 4D model (Define, Design, Develop, Disseminate). The subjects were eleventh-grade students of SMA Negeri 17 Medan in the 2025/2026 academic year. The instruments used included expert validation sheets, student response questionnaires, and learning outcome tests (pretest and posttest). The results showed that the developed e-module was valid based on expert evaluations. The practicality level was categorized as good based on student responses regarding ease of use, design, and learning benefits. Furthermore, the e-module was proven effective in improving students’ learning outcomes with an N-gain score of 0.71, categorized as high. Therefore, the PBL-based e-module integrated with a deep learning approach can be used as an innovative teaching material to enhance conceptual understanding, student engagement, and critical thinking skills in thermochemistry learning.
Co-Authors Abd Hakim S Afrilia Tria Ivanka Agnes Aprilyani Br Silitonga Ahmad Fauzi Syahputra Yani Ahmad Nasir Pulungan Alisya, Syalwa Nur Anna Sakila Ardila, Mutia Ayi Darmana, Ayi Br. Hutahuruk, Novitasari Budiman Anwar Dalimunthe, Makharany Damanik, Marini Dian Wardana Dimas Ridho Dindy Louiza Pangaribuan Dira Rahma Cahya Dwi Sapri Ramadhan Einstenia Sirait Eren Nazura Faizah A. Nasution Feri P. Jahata Samosir Flia Arnesta Sipayung Geby Mai Irawan Gioni Thesia Boru Simbolon Gresvita Sanova Turnip Haqqi Annazili Nasution Ida Duma Riris Indra Koto Jaman Fahmi Julian, Alfira Juwitaningsih, Tita Mahyunidar Mahyunidar Moondra Zubir Muhaimin Muhaimin Muhammad Fadhli Mutia Ardila Mutia Ardila Najwa Putri L. Nasution Nasution, Haqqi Annazili Ningsi, Rira Octa Nove Briani Minar Sihombing Nur, M Rosyadi Izzuddin Okta Miranda Samosir Pratiwi, Alfira Julian Rabiah Afifah Daulay Rahmani, Mei Ratna Sari Dewi Samosir, Rafidah Almira Sari Mawaddah Sa’diyah, Halimatus Sianipar, Mirna Wulan Sari Sitinjak, Ezra Rohanauli Sri Adelila Sari Syah Nurul Riswana Tafonao, Firman Satria Tetra Tasya Anggraini Butar Trimutia Wulandari Vivy Cintia Laudia Hutagaol Wilda Syahri Wulan Dwi Safitri