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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 21 Documents
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Search results for , issue "Vol. 12 No. 5 (2024): October 2024" : 21 Documents clear
Comparison of Ethanol Levels in Yellow and Red Watermelon Wine Tan, Andreas Felix; Manao, Mutiara Angelina; Delviyanti, Maria Novia; Honesty, Pricillia Pretty Septy; Hapsari, Natalia Diyah
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 5 (2024): October 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i5.11464

Abstract

Watermelon is one of the tropical fruits that has high water and sugar content. However, the selling price of watermelon is still relatively low, and there is limited processing variation. By utilizing the high water and sugar content in watermelon to create an alcoholic beverage, wine is one promising form of innovation. The aim of this research is to determine the difference in alcohol content of wine made from yellow and red watermelon. The samples used in this study were yellow and red watermelons. Yellow and red watermelons fermented with Saccharomyces cerevisiae yeast to transform them into wine. The ethanol content in wine and red watermelons was analyzed using GC-MS instruments. Subsequently, the soluble sugar content, pH, IR spectra, as well as the color, taste, and aroma of the wine also analyzed. The research results show that the average ethanol content of yellow and red watermelon wines is 7.59% and 6.61% respectively. The average soluble sugar content in yellow and red watermelon wines is 8.6% Brix and 12.64% Brix, respectively. The pH value of each wine sample is 4, and the IR spectra of each wine sample indicate the presence of stretching OH groups. In conclusion, red watermelon wine has a lower ethanol content than yellow watermelon wine.
Development of Chemistry Edutainment Learning Media to Enhance Students Retention Nisa, Chairun; Kurniasih, Dedeh; Hadiarti, Dini; Kurniati, Tuti
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 5 (2024): October 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i5.12350

Abstract

The teaching media that a teacher uses can have an impact on the comprehension and memory of the students. Chemical bonding material is one of the learning resources that educators are encouraged to employ to assist and promote more creative, engaging, and enjoyable learning experiences. Chemistry Edutainment media is one type of educational resource that can be employed. This study attempts to characterize student learning retention following chemistry lessons using chemistry edutainment on chemical bond material for class X MAN 3 Pontianak, as well as to ascertain the validity, practicality, and efficacy of chemistry edutainment media. The methods of measurement, observation, and interviewing are employed in the data collection process. Student learning outcomes assessments, observation sheets, and interview sheets were the instruments utilized to collect the data. The study employs the ADDIE method, yielding validation rates of 93.3% for the material aspect and 90.6% for the media aspect. These percentages denote a high level of validity. The practicality percentages, derived from the initial and main field trial questionnaire responses, are 87.17% and 94.03%, respectively, indicating a high degree of practicality. Moreover, the effectiveness analysis, based on the learning outcomes following the use of Chemistry Edutainment media, resulted in N-Gain scores of 0.92 and 0.71 for the initial and main field trials, respectively, meeting the high effectiveness criteria. The retention percentages obtained in the initial and main field trials are 75% and 89.97%, respectively, which meet the high retention criteria.
Antioxidant Activity of Hydnophytum formicarum Extract by TEAC method (Trolox Equivalent Antioxidant Capacity Assay) Purnamasari, Mayshah
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 5 (2024): October 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i5.12624

Abstract

Oxidative stress, caused by excess reactive oxygen species (ROS), is believed to be a major contributor to aging and various degenerative diseases. Plant-based antioxidants have gained significant attention for their potential in combating R.O.S. Hydnophytum formicarum, traditionally used to treat diabetes, is evaluated as a natural antioxidant source. This study is the first to assess the antioxidant activity of H. formicarum tuber ethanol extract using the TEAC method, revealing a high antioxidant capacity (220.38 ± 0.61 M TE/100 g), highlighting its potential as a dietary supplement.
Designing POGIL Based Student Worksheets for Buffer Solution Learning at SMAN 2 Sawahlunto Wanti, Sri; Mawarnis, Elvy Rahmi; Herman, Mimi
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 5 (2024): October 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i5.12696

Abstract

The purpose of this study was to produce a valid and practical Process Oriented Guided Inquiry Learning (POGIL)-based Student Worksheet (LKPD) on 11th Grade Class Buffer Solution Material at State Senior High School (SMAN) 2 Sawahlunto. This research uses the Research and Development research method with the 4-D development model (define, design, develop, and disseminate). However, the stages in research with this 4-D model are only carried out from the first to the third stage, namely the define stage aims to get an overview of field conditions, the design stage aims to compile and design POGIL-based Student Worksheets (LKPD) on buffer solution material, and the develop stage aims to continue the POGIL-based LKPD on buffer solution material that has been designed with validity and practicality tests. The research instruments used were validation sheets and response questionnaire sheets. The validation sheet was filled by 2 lecturers and 1 chemistry educator. The response questionnaire sheet was filled by 25 of 11th grade students and 2 chemistry educators of SMAN 2 Sawahlunto. The results showed that 1) POGIL-based LKPD on buffer solution material meets the valid criteria with 85.42% validation results. 2) POGIL-based LKPD on buffer solution material has met the practical criteria with educator practicality response questionnaire results of 92.31% and student response questionnaire results of 82.15%.
Ethnochemistry: Analysis the Relevance of Elements Periodic System in the Making of Kawali Bugis Bone as a Learning Chemistry Source Yusaerah, Nur; Imranah, Imranah; Sartika, Sartika; Fajrah, Nur
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 5 (2024): October 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i5.12811

Abstract

Kawali is one of the war tools of the Bugis Bone community which in its manufacture involves the process of forging, carving, chiseling, and the use of artistic symbols which are used as cultural heritage. Given the importance of knowledge about the benefits of chemistry in life, knowledge about the chemical elements contained in the kawali cultural heritage is needed as an effort to foster learning awareness that is integrated with local wisdom values. This research was carried out to reveal the fundamental chemical activities contained in the kawali making process starting from the forging and folding process, blade formation, ornament formation and electroplating which can be used as a source of learning chemistry by paying attention to the chemical concept involving chemical elements in the kawali making process. This research adopts a qualitative descriptive approach with ethnographic methods, involving observation, interviews, and documentation. The data analysis process is carried out inductively using source triangulation, so that key, primary, and supporting informants are selected for each aspect that is the focus of the study. The results of the research show that the fundamental activities in the process of making kawali Bugis Bone include heating and expansion, metal extrusion, metal reduction and electroplating with chemical concepts including metal elements, electron configuration, metal properties, corrosion, redox reactions, and metal alloys, as well as chemical elements involved in the manufacturing process, namely iron, steel containing carbon, manganese, silicon, aluminum, nickel, chromium, cobalt, molybdenum and vanadium.
Exploration of Natural Dye Plants in Kumpang Ilong Village, Belitang Hulu District, Sekadau Regency Listiani, Etma; Masriani, Masriani; Erlina, Erlina
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 5 (2024): October 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i5.12916

Abstract

The people of Kumpang Ilong Village, Belitang Hulu District, Sekadau Regency have used plants as natural dyes for daily needs, such as dyes for woven fabrics, food, and beverages. The use of natural dyes from local plants can be an environmentally friendly alternative compared to synthetic dyes which can cause various problems such as environmental pollution, toxicity, and the risk of allergies to humans. This study aims to identify the types, parts, and ways of using plants as natural dyes by the community of Kumpang Ilong village, Belitang Hulu District, Sekadau Regency. This study is a descriptive research to describe the use of plants used as natural dyes by the people of Kumpang Ilong Village using a data collection method that is carried out in a triangulation manner with interview, observation, and documentation techniques. The determination of 24 informants was carried out by purposive sampling technique in order to obtain detailed information.  Information was obtained by direct observation using semi-structured interview techniques. The results of the study showed that there were 20 types of natural dye plants used by the people of Kumpang Ilong village, Belitang Hulu District, Sekadau Regency.
Utilization of Chili Citrus (Citrus microcarpa) as a Natural Fixator for Dyeing Cotton Fabrics with Dayak Onion Tuber Extract (Eluetherine palmifolia (L.) Merr) Widyasari, Ida Ayu Made Tania; Masriani, Masriani; Hairida, Hairida
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 5 (2024): October 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i5.12917

Abstract

The high demand for the textile industry can pollute the environment through waste. Natural dyes from natural ingredients are used as a step to minimize this waste.  Dayak onions can be used as a natural dye because they produce a red color from anthocyanin compounds. However, natural dyes have weaknesses, namely that the color is less stable and fades easily, so a fixator is needed. Fixator is used to strengthen the color in fabrics that use natural dyes. Orange chili sauce has the potential to be a natural fixator because it contains citric acid. This research aims to analyze the effect of the concentration of chili pepper fixator (Citrus microcarpa) on the color fastness of cotton fabric using natural dyes from Dayak onion bulbs (Eleutherine palmifolia (L.) Merr). The research method used was an experiment using a colorimeter application whose results were in the form of ΔE values. The test was carried out on the color of the fabric that had been dyed and fixed and then the average value (ΔE) was measured before and after washing the soap. The research results showed that the average value (ΔE) of the smallest to largest fixator was a concentration of 20%, 100%, 0%, 40%, 60% and 80%. Based on the results of the Kruskal Wallis test followed by the Bonferroni test, a significant value of 0.024 (p>0.05) was obtained at a concentration of 20%. This shows that the chili lime fixator has a significant influence on the fastness of the fabric.
Optimization of Distillation Process for Scale-up Production of Lavender Essential Oil: A Literature Review Dwipa, Yusri Hajjo; Salsabila, Cheryl; ‘Azmi, Madah Ikrimatul; Sukmawati, Nani; Assyifa, Muhammad Zaky; Syauqillah, Ahmad; Fikroh, Retno Aliyatul
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 5 (2024): October 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i5.12920

Abstract

Lavender essential oil being one of the most used essential oils. Oxygenated monoterpenes are the largest constituent of lavender essential oil and the determinant of the characteristic aroma produced. Lavender flowers are composed of several ingredients, such as essential oils, alpha-pinene, beta-myrcene, limonene, cineol, linalool, terpinine-4-ol, and linalyl acetate. The aim of this study is to develop an efficient, effective, and profitable method of lavender oil extraction that can be used for commercial scale production, in order to determine which method is most suitable for scale-up production. The method used in this study is literature review with the results of literature reviews conducted, the method with the highest percentage of essential oil components is the use of innovative methods such as extraction with the help of microwaves (MW) with the percentage of linalool (32.90%) linaly acetate (27%), extraction with the help of ultrasonic (AS) with the percentage of linalool (37.6% ), linalyl acetate (18.4%)., supercritical fluid extraction (SF) with linalool (24%), extraction, and negative pressure extraction (NPCE) with linalool percentage (27.18%) linaly acetate (25.23%). While the smallest percentage of essential oil components in the use of molecular distillation is the percentage of Linalool (4.56%), linaly acetate (12.78%). The originality of this research contribution can open the door for further research and wider practical applications.
Implementation of Sekolah Penggerak Programme to Address Chemistry Teachers Competency on Design PjBL-based Digital Teaching Materials in Padang Suryani, Okta; Sari, Trisna Kumala; Riga, Riga; Mawardi, Mawardi; Putra, Ahadul
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 5 (2024): October 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i5.12952

Abstract

Teaching materials for Sekolah Penggerak should be prepared based on a creative thinking learning model such as project-based learning (PjBL). However, based on the needs and situation of teachers towards the implementation of PjBL-based learning, implementation of PjBL in learning is still low, since the teachers in Padang need the advance training of preparation in PjBL learning material. The Community service activities have been carried out to provide experienced chemistry teachers in developing teaching materials based on Project-Based Learning. The implementation methods carried out in this activity are: (1) Analyzing the needs and situation of teachers towards the implementation of PjBL-based learning through questionnaires distributed, (2) Submission of material to service participants related to the PjBL learning model and syntax in this learning model explained by the speaker, then (3) Teachers are given the task of compiling and designing chemistry LKPDs using the PjBL model, (4) Teachers will present the results of the LKPD design compiled, and (5) evaluation of activities. The results of the service activities carried out can provide experience and understanding for chemistry teachers in Padang city regarding the PjBL learning model. Participants who attended this service activity could prepare chemistry teaching materials using the PjBL model so that teachers could be more innovative and creative. This activity service can provide motivation for teachers to prepare teaching materials in accordance with the demands of the Kurikulum Merdeka, especially in the implementation of project-based learning.
Development of E-Supplement Flipbook Material Amino Acid Compounds from Tampoi Fruit (Baccaurea Macrocarpa) Hidayat, Niko; Masriani, Masriani; Sasri, Risya; Enawaty, Eny; Erlina, Erlina
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 5 (2024): October 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i5.12958

Abstract

The purpose of this study was to determine the feasibility and response to E-Supplement Amino Acid in Tampoi Fruit (Baccaurea macrocarpa). This research method is research and development (R&D) with the ADDIE model consisting of analysis, design, development, implementation, and evaluation. The data collection technique in this study used measurement techniques with instruments, namely feasibility assessment sheets and response questionnaires. Data analysis used Guttman scale and average calculation. The feasibility of e-supplements was validated by two validators each. The results showed that the E-Supplement of Amino Acids in Tampoi Fruit (Baccaurea macrocarpa) has a feasibility level in the aspects of material, media, and language, which is very feasible (k = 100%). The average percentage of student responses to e-supplements is 90.94% with a very feasible category. So E-Supplement Amino Acids in Tampoi Fruit (Baccaurea macrocarpa) is very feasible to use and get a very good response from students.

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