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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 26 Documents
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Search results for , issue "Vol. 13 No. 3 (2025): June 2025" : 26 Documents clear
Development of Chemistry Learning Performance Assessment Instruments: Systematic Literature Review Hasibuan, Nurhalimah; Ariani, Winda; Nahadi, Nahadi
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.v13i3.14381

Abstract

Assessments that are generally carried out by teachers usually only focus on cognitive aspects, whereas assessments of cognitive, affective, and psychomotor aspects also need to be carried out. This study aims to develop a performance assessment instrument. Performance assessment is a form of authentic assessment that aims to improve learning and provide constructive feedback to teachers and students. Although it has many benefits, performance assessments are rarely carried out by teachers during learning due to the teacher's limitations in creating performance assessment instruments. Performance assessments can be in the form of product assessments and practice assessments. The research method used follows the PRISMA guidelines, namely by selecting articles from Google Search and Google Scholar. The results of the study showed that out of 121 articles, 9 articles met the criteria for further review. In conclusion, research on the development of performance assessments, especially in the field of chemistry, needs to be further developed. This has implications for the need for more effective developmental performance assessment instruments, especially in Indonesia, so that they can meet the needs of the current education curriculum.
Kinetic Analysis of Saponification Reaction in Eco-Friendly Soap Production Based on Waste Cooking Oil Wahyudi, Apri; Sitrous, Berlian; Hidayat, Ferdinand
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.v13i3.14828

Abstract

This study aims to determine the kinetics of the saponification reaction in making solid soap from wasted cooking oil and its effect on the quality of the solid soap produced. The novelty of this study lies in evaluates the effect of different NaOH concentrations and reaction durations on the the kinetic model with quality parameters (free fatty acid, free alkali content, and pH) to demonstrating that a pseudo second order reaction mechanism contributes to superior soap characteristics. The method begins with the refining of wasted cooking oil using activated carbon, making solid soap from refined oil with variations in NaOH concentrations of 1; 1.5; and 2 M in 30; 45; and 60 minutes. Determination of reaction kinetics was carried out by titrimetry and testing the quality of solid soap with parameters of free fatty acid content, free alkali, and degree of acidity (pH) based on SNI 3532-2021. The results showed that the saponification reaction followed 2nd order pseudo kinetics. This is supported by the value of the reaction constant reaching 1.0995 min-1 and the coefficient of determination R2= 0,9954. The optimum variation of solid soap obtained is 2 M NaOH concentration in 60 minutes. Soap products produced through pseudo second-order reaction kinetics have high quality with a white appearance, no rancid odor, smooth and soft texture. This is evidenced by the parameters of free fatty acid and free alkali content of 0.1126% and 0.016%. The degree of acidity (pH) of the solid soap produced is also in the range of 9.5-10. All of these parameters have met the criteria for solid soap according to SNI 3532: 2021.
Formulation of Solid Soap Preparation from Used Cooking Oils with Pineapple Peel Eco-enzyme Salsabila, Luvena; Pradnya, Irene Nindita; Maulana, Ivan; Diana, Savira Rahma; Amalia, Annisa
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.v13i3.15337

Abstract

This study explores the formulation and quality evaluation of solid soap made from recycled cooking oil enriched with fermented Ananas comosus (pineapple) peel extract. Three formulations were prepared using varying concentrations of pineapple peel eco-enzyme, while maintaining consistent proportions of palm sugar and water. The soap samples underwent physicochemical characterization in accordance with Indonesian National Standards (SNI). Results showed that all formulations had pH values within the acceptable range. Moisture content met regulatory limits in two formulations. All samples exhibited good foam stability, although the free fatty acid content exceeded permissible levels, likely due to extended hydrolysis during processing. Organoleptic assessment revealed uniform cream coloration, a characteristic aroma resembling soybean milk that decreased with higher eco-enzyme concentrations, and increased astringency corresponding to the concentration of pineapple extract. The soap maintained a solid texture with varying degrees of tackiness. This research demonstrates the potential for converting household waste into value-added products, while highlighting the need for further optimization to ensure compliance with commercial quality standards.
Alpha Amylase Inhibitory Activity of Curcumin Analogs and Its Synergy with Ferulic Acid in Vitro Nafillah, Khoirotun; Ariyani, Helena Devi; Asfirah, Lia Retian
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.v13i3.15683

Abstract

Curcumin analog compounds are α,β unsaturated compounds through simplifying the beta diketo group to monoketo, which has better bioavailability and a more stable structure than curcumin compounds. This study aims to determine the α-amylase inhibitory activity on symmetric curcumin analog compounds, namely the compounds 2,6-bis(3,4-dimethoxybenzylidine)cyclohexanone (A) and 2,6-bis(3,4-dimethoxybenzylidine)cyclopentanone (B). as well as testing its synergistic interaction with ferulic acid in vitro. The α-amylase inhibition test was carried out using an iodine reagent and a starch solution as a substrate. The absorbance value was measured using a UV-vis spectrophotometer (λ 568 nm), and the % inhibition was calculated. The average value of the optimum α-amylase inhibition percentage for compounds A, B, and ferulic acid, respectively is 58.17%; 22.95%, and 93.52%. Based on the synergistic interaction, it was concluded that compounds A and B showed synergistic activity with ferulic acid. The percentage of α-amylase inhibition in the concentration ratio of curcumin analog A: ferulic acid (1:8) was 98.65%, and curcumin analog B: ferulic acid (1:4) was 98.37%. This shows that combining compounds between symmetrical curcumin analogs and ferulic acid can increase the activity of antidiabetic drug candidate compounds compared to single compounds. This study offers a new approach by testing the potential combination of curcumin and ferulic acid analogues as α-amylase inhibitors in vitro, demonstrating a synergy that has not been widely explored and opening up opportunities for developing more effective natural antidiabetic therapies.
Comparative Analysis of Antioxidant Potential in Hexane and Methanol Fractions of Sungkai Leaves Deswita, Elvira; Imelda, Imelda; Suryati, Suryati
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.v13i3.15692

Abstract

This study aimed to compare the antioxidant potential of hexane and methanol fractions of sungkai (Paronema canescens Jack) leaves from Tanah Datar Regency, West Sumatra, Indonesia. The methanol extract was then fractionated using hexane and ethyl acetate. Total phenolic content was determined using the Folin-Ciocalteu method and antioxidant activity was evaluated using the DPPH (2,2-diphenyl-1-picrylhydrazyl) assay. According to the conducted research, the methanol fraction exhibits a significantly higher total phenolic content, quantified at 92.22 mg GAE/g, in contrast to the hexane fraction, which recorded a content of 25.33 mg GAE/g. Furthermore, the methanol fraction demonstrated robust antioxidant activity, with an IC50 value of 75.425 mg/L, whereas the hexane fraction demonstrated comparatively weaker antioxidant activity, with an IC50 value of 232.595 mg/L. The strong antioxidant activity of the methanol fraction can be attributed to its high content of phenolic compounds, such as flavonoids and tannins, which are known to possess potent antioxidant properties. The synergistic effects of these compounds may further enhance the overall antioxidant capacity of the methanolic fraction. In conclusion, the methanol fraction of sungkai leaves from Tanah Datar Regency demonstrates superior antioxidant potential compared to the hexane fraction, suggesting its potential as a natural source of antioxidants for various applications.
Educational Magazine Contains Phytochemical Screening Materials for Chemistry Education Students: Development and Validation Furnapasta, Lestia; Sofia, Baiq Fara Dwirani
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.v13i3.15768

Abstract

This study aims to develop and validate an educational magazine as supplementary reading material for chemistry education students, focusing on the phytochemical screening of renggak leaf extracts using methanol and ethanol as solvents. The development of this magazine was carried out using a 4D model which was carried out until the third stage. The three stages are Define, Design, and Develop. Validation was conducted by three experts, and the evaluation results, analyzed using the Aiken V formula, yielded a score of 0.86, categorized as highly valid. Practicality testing with students indicated a score of 88%, demonstrating that the magazine is effective and user-friendly as a learning medium. Thus, this magazine is a viable supplementary resource for chemistry education students, particularly in understanding secondary metabolite compounds and phytochemical screening. The novelty of this research lies in the development of a visual educational magazine based on the phytochemical screening of Amomum dealbatum leaves, which has not been previously presented in this format to support chemistry learning.
The Effect of Collaborative Problem Solving Learning Model on Students' Collaboration Skills in Chemistry Learning Lestari, Wahyu Yunita; Erika, Farah; Rahmadani, Agung
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.v13i3.15784

Abstract

The low collaboration skills of students are due to the less-than-optimal role of the teacher in fostering interpersonal skills and cooperation in the classroom. Selecting an appropriate learning model is key to effectively enhancing students' collaboration skills. Therefore, the Collaborative Problem Solving (CPS) learning model optimizes students' collaboration skills. This study aims to determine the effect of the Collaborative Problem Solving (CPS) model on students' collaboration skills in elements, compounds, and mixtures. The approach employed is a quasi-experimental design utilizing a non-equivalent control group format. All 8th-grade junior high school students in Samarinda for the 2023/2024 academic year served as the population in this study. Class VIII A was assigned as the experimental group, whereas Class VIII B was the control group. The sample was selected using purposive sampling based on the subject teacher’s considerations, including classroom participation, group collaboration, and peer interaction. The instrument used was a collaboration skills questionnaire consisting of 25 statement items, utilizing a 5-point Likert scale. Data collection was also carried out using an observation sheet developed based on the indicators of collaboration skills. The data were analyzed descriptively after being collected through observations and collaboration skill questionnaires. The findings indicated that the experimental group achieved a higher average score than the control group, indicating that the CPS model syntax positively improved students' collaboration skills.
Students’ Misconceptions in Chemistry Learning: A Systematic Literature Review from 2015 to 2025 Pahriah, Pahriah; Sudatha, I Gde Wawan; Suartama, I Kadek; Santosa, Made Hery
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.v13i3.15805

Abstract

This study aims to identify the forms of misconceptions in chemistry learning, the methods/instruments used to detect these misconceptions, and effective instructional strategies to address them through a Systematic Literature Review (SLR) approach. The review was conducted on 24 scientific articles published between 2015 and 2025, obtained from the Scopus and Google Scholar databases (via Publish or Perish). Article selection was carried out in stages following the PRISMA flow, and the results were analyzed using a thematic content analysis approach. The review findings indicate that the topics most frequently associated with misconceptions are chemical bonding, acid-base concepts, chemical equilibrium, and reaction rates. The most commonly used instruments to identify misconceptions are three-tier diagnostic tests, followed by interviews and two-tier tests. Effective instructional strategies include the use of multiple representations, digital simulations, the 5E model, inquiry-based learning, and educational games. The study also revealed several research gaps, such as the lack of longitudinal studies, limited topic coverage in chemistry, and the underutilization of interactive digital technologies. Therefore, the development of innovative learning approaches and technology-based conceptual assessments is necessary to sustainably reduce misconceptions in chemistry learning.
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.
Improving Students’ Creative Thinking Skills through Problem Based Learning on Colloid: A Lesson Study Practice Munawaroh, Siti; Herunata, Herunata; Silviani, Silviani
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.v13i3.15840

Abstract

This study aims to improve students' creative thinking skills with Problem Based Learning (PBL) model assisted google sites on through lesson study practice on colloid topic. The research was conducted in the form of Classroom Action Research (CAR) over two open class cycles involving 34 students of class XI-C at state senior high school (SMAN) 2 Malang. The learning strategies used were mind mapping in cycle I and colloid-based product design projects in cycle II. Data were collected through observation sheets and creative thinking skills questionnaires based on Torrance’s indicators: fluency, flexibility, originality, and elaboration. The results showed a significant increase in the average score of students' creative thinking skills from 1.97 (fair) in cycle I to 2.64 (good) in cycle II. The highest improvement occurred in elaboration and flexibility indicators, while originality improved but remained in the fair category. These findings indicate that the integration of context-based digital media with the PBL model and reflective practices such as lesson study can gradually and significantly improve students' creative thinking skills.

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