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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 618 Documents
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The Chemistry Teacher Activities on The Training of Project Based Learning Teaching Materials Digitalisation Suryani, Okta; Sari, Trisna Kumala; Riga, Riga; Mawardi, Mawardi; Yuhelman, Nofri; Nasra, Edi; Velly, Aglin; Rahmad, Nafisah Yulia
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.13495

Abstract

This activity is the second year of community service which is a continuation of training activities and making digital teaching materials to support project-based learning (PjBL) in sekolah penggerak for chemistry teachers in Padang city. This second year of community service activities has the theme of training to digitise project-based learning teaching materials developed at the Chemistry Musyawarah Guru Mata Pelajaran (MGMP) in Padang city. This activity aims to provide direction to Padang city chemistry teachers in implementing digital teaching materials. This community service was carried out in the lecture building of FMIPA Universitas Negeri Padang on 9 August, 16 August, and 23 August 2024. The implementation methods carried out in this community service activity are: (1) conducting a needs analysis, knowing the situation of teachers towards the implementation of PjBL-based learning through questionnaires distributed, (2) delivering material to community service participants related to PjBL and an overview of teaching materials that have been designed using the PjBL learning model explained by the speaker, then (3) delivery of materials and discussions related to differentiated learning with the PJBl learning model, and (4) delivering material related to the digitalisation of project-based teaching materials or PjBL using liveworksheet. The results of the service activities carried out can provide motivation, provide experience, and understanding for Padang city chemistry teachers regarding the digitalisation of project-based learning teaching materials so that chemistry teachers in Padang city can prepare digital chemistry teaching materials, especially with liveworksheets using the PjBL model that can assist learning activities so that learning can run effectively and efficiently in accordance with the demands of the curriculum and the times.
Identify the Saccharin Content in Iced Tea Sold in Jl. Sapta Marga, Sapta Marga Village, Mataram City Wahyuningsih, Sri; Azwaruddin, Azwaruddin; Abdullah, Taufik
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.13510

Abstract

Saccharin is an artificial sweetener made from sodium salt, sodium saccharin with the chemical formula C7H5NO3S from saccharin acid which is in the form of white crystalline powder, easily soluble in water, odorless and very sweet. Saccharin has a sweetness level of 300-600 times that of natural sweeteners. This artificial sweetener also has a maximum limit for its use, namely according to Bpom No. 11. In 2019, it is 954 mg/l. The aim of the research is to determine whether there is a saccharin compound present or not and to find out how much saccharin is contained in iced tea drinks circulating on the Sapta Marga road in the Mataram City area.Sampling uses predeterminet criteria. This type of research is descriptive qualitative. The analysis in this research was carried out in 2 types, namely qualitative analysis using the resorcinol color test method and quantitative analysis using the Uv-Vis spectrophotometry method. The results of qualitative identification using the color test method carried out on 5 samples of iced tea drinks did not produce positive samples so that all samples were not continued to the quantitative test stage.
The Synthesis of Methyl Ester Nitrate from Ketapang Seed Oil (Terminalia catappa L.) Nurliana, Laily; Ritonga, Halimahtussaddiyah; Feronika, Yulita; Musta, Rustam
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.13537

Abstract

The synthesis of methyl ester nitrate (MEN) from ketapang oil (Terminalia catappa L.) have been carried out. This study aims to determine the yield and the characteristics of MEN. In this study, ketapang seed oil was obtained from the soxhlet extraction process followed by an evaporation process to separate the oil from the solvent. MEN can be produced from ketapang seed oil by esterification to convert all of FFA became ester, followed by transesterification that intended to produce ester from triglycerides and nitrationthat is reaction of esther and HNO3 to create MEN. Evaporated oil is esterified using methanol with a mole ratio of oil: methanol (1: 6), then the transesterification process using methanol with a mole ratio (1:15) gives a yield of 86%. The transesterification product was then nitrated using HNO3 and H2SO4 for 4 hours with a yield of 83%. Characterization of methyl ester using GC-MS characterization showed the presence of methyl palmitoleate (C17H32O2), methyl palmitate (C19H34O2), methyl oleate (C19H36O2), methyl 13-octadecanoic (C19H36O2), methyl stearate (C19H38O2), and methyl 18-nonadecanoic (C21H42O2). Characterization MEN using a FTIR spectrophotometer showed the presence of a C-ONO2 group at wave number 1550 cm-1, NO2 group at wave number 1365 cm-1 and a C-N group at wave number 1118 cm-1. It shows that MEN can be synthesized from ketapang seed oil.
Integrating Constructivist and Inquiry Based Learning in Chemistry Education: A Systematic Review Suryati, Suryati; Adnyana, Putu Budi; Ariawan, I PutuWisna; Wesnawa, I Gede Astra
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.v12i5.13571

Abstract

This study systematically examines the integration of constructivist and inquirybased learning (IBL) strategies in chemistry education, emphasizing their transformative potential for enhancing student engagement, conceptual understanding, critical thinking, and problem solving skills. Utilizing a systematic review methodology, 30 peer reviewed articles from credible databases such as Scopus and Web of Science were analyzed. The findings reveal that gamification, virtual reality (VR), molecular visualization, and guided inquiry significantly improve learning outcomes by contextualizing abstract concepts and fostering active participation. Gamification and VR were particularly effective at the high school and tertiary education levels, respectively, while inquiry based laboratory activities enhanced higher-order thinking skills. The analysis highlights the theoretical alignment of these strategies with constructivist principles and their practical application in modern pedagogy. Despite their benefits, challenges such as resource limitations and insufficient teacher training persist, hindering wider adoption. Addressing these barriers through professional development, resource investment, and innovative curriculum design is essential for maximizing the impact of constructivist and IBL approaches. This study provides actionable recommendations for educators, policymakers, and researchers, advocating for systemic changes to advance chemistry education in diverse learning contexts. By combining theoretical insights with practical applications, this research underscores the importance of active, inquiry driven learning environments for preparing students to excel in STEM fields.
Literature Review: Universal Design for Learning (UDL) Approach of Chemistry Learning in Inclusion Schools Nurramadhani, Aisyah Zahra; Pratama, Kiki Putri Septya; Amelia, Lisa; Kusuma, Aldi; Erika, Farah
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.13636

Abstract

Inclusive education is a promising way to create an equitable and high-quality education system that accepts all learners, including those with special needs. Universal Design for Learning (UDL) offers a flexible and dynamic approach to meet the various needs of learners, helping them to reach their full potential in education. This literature study aims to discover the application of the universal design for learning approach in chemistry learning. The research method used Narrative Literature Review (NLR), which uses the Google Scholar database to search for journal articles from the last ten years. The results of the literature show that applying the Universal Design for Learning approach in chemistry learning has a major influence in improving the learning experience and learning outcomes of students with special needs. Various interesting teaching materials such as learning videos, interactive games, and the application of E-modules are also used to support the learning process.
Antioxidant Activity of Avocado Folium (Persea americana M.) Wusurwut, Fahriya; Hasnaeni, Hasnaeni; Waris, Risda
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.13638

Abstract

Free radicals can be formed through normal cell metabolism events, malnutrition and as a result of responses to external influences such as pollution and ultraviolet rays. Free radicals can cause premature aging, therefore antioxidants are needed to prevent premature aging. Avocado folium (Persea americana M.) contain secondary metabolite compounds, namely alkaloids, saponins, tannins, glycosides and flavonoids in the form of quercetin, where flavonoid compounds can act as antioxidants. This study aims to determine the antioxidant activity of avocado leaf extract (P. americana M), using the (2,2-dihphenyl-1-picrylhdrazil) (DPPH)  method. The sample used in this research was avocado folium obtained from Southeast Maluku, Maluku Province). DPPH method with a UV-Vis spectrophotometer at a wavelength of 514 nm. The antioxidant activity of ethanol extract of avocado folium in this test is 112.410 µg / mL. The results of this study show that avocado folium extract has moderate antioxidant activity.
Development of Student Activity Sheets (SAS) to Practice Each Creativity Characteristics on Redox Reaction with Project Based Learning (PjBL) Model Fathimah, Aurellia Inin; Mitarlis, Mitarlis
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.13758

Abstract

This study aims to determine the feasibility of a Project Based Learning (PjBL) based student activity sheet (SAS) as a learning media on redox reaction material. The feasibility of this SAS is reviewed based on validity, practicality, and effectiveness. The research method used is the research and development model. The product trial design used a one-group pretest posttest. This research was conducted with a total of 29 student in class XI. The research instruments used in this study were SAS validation sheet, student response questionnaire sheet, student activity observation sheet, learning implementation observation sheet, creativity test question sheet, and learning outcome test question sheet. The SAS developed was declared: (1) feasible because it gets a mode score of 4, (2) practical because it gets the results of the student response questionnaire of 97.6%, the results of the observation of student activity and the observation of learning implementation which gets a mode score of 5, (3) effective for training student' creativity because it gets a p-value of 0.000 from the results of the paired sample t-test which shows that the posttest value is higher than the pretest value and there is a significant difference between the pretest and posttest values. The effectiveness of the developed SAS is also supported by the results of the learning outcomes test which get a p-value of 0.000 from the paired sample t-test results which also show that the posttest value is higher than the pretest value and there is a significant difference between the pretest and posttest values. For this reason, PjBL-based SAS on redox reaction material is suitable for use as a learning medium.
Colorimetric Sensor of Hg(II) Ion from AgNPs-MO Quantified Using DIC with ED Equation Approach Thohir, Muhammad Bakhru; Tiyas, Windi Pangesti Kusumaning
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.13772

Abstract

Mercury is one of the heavy metals that has high toxicity, not only for the environment but also for human health. Mercury is found in many cosmetic products; unfortunately, for people who do not understand the dangers of mercury cosmetic ingredients, their skin will become red rashes. The novelty of this article is to use colorimetric sensor for mercury combined with Digital Image Colorimetry (DIC). The image is captured with the the smartphone camera and quantified using the Euclidean Distance (ED) Equation approach. In addition, the synthesized AgNPs also use the green synthesis method with natural materials as reducing agents and stabilizers. Therefore, the purpose of this study is to determine the best synthesis conditions and determine the detection performance of mercury (II) ions. The research began with the synthesis of mercury detection substances, namely silver nanoparticles reduced and stabilized by Moringa oleifera leaf extract (AgNPs-MO). In this study, it was found that silver nanoparticles began to form at 1 hour accompanied by heating at 120°C using a hotplate, while 6 hours when without heating. The optimum pH condition is 10. This mercury detection method has good sensitivity and accuracy values, with RSD values of less than 1% for each analyte in 5 repetitions.
Synthesis of Cellulose Straw and Rice Husk as Raw Materials for Bioplastic Production Hardi, Gilar Wisnu; Dewi, Berlian Kusuma; Toruan, Sari Artauli Lumban; Nurjanah, Suci; Fitriana, Syifa Ayu; Yunita, Lia
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.13795

Abstract

The development of environmentally friendly materials such as bioplastics is a solution to reduce the negative impact of conventional plastics on the environment. This study presents a novel approach by utilizing hemicellulose extracted from rice straw and husks—abundant agricultural waste materials—as the main raw materials for bioplastic production. Hemicellulose was extracted using the alkalization method, and its characterization was carried out through FTIR analysis to identify typical polysaccharide functional groups. The results of the analysis showed the presence of O-H, C-H, and C-O-C groups, which indicate the glycosidic structure of hemicellulose, as well as indications of residual lignin with C=C groups. The resulting hemicellulose was then processed into bioplastics with the addition of plasticizers and reinforcing materials, incorporating glycerin, CMC, and TiO₂ to enhance mechanical properties and biodegradability. Mechanical and degradation tests demonstrated superior performance, highlighting the synergy between these additives. This study provides an innovative strategy for transforming agricultural waste into high-value bioplastics, contributing to sustainability and advancing green material technology.
Development of Particle Board Biocomposite From Coffee Skin and Tofu Dregs With Polyethylene Plastic Adhesive As Furniture Interior Hidayat, Ali Nurdin; Permana, Edwin; Wijaya, Dhian Eka; Pratama, Yoga; Zufri, Fauzi
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.13802

Abstract

The need for particle board interiors is still in great demand to be used as wood-sourced interiors. In line with this, currently the problem of waste is still a fairly complex problem, both organic and inorganic waste. Coffee rinds and tofu pulp are organic wastes that have not been optimally utilized. Therefore, research was conducted on the manufacture of particleboard from coffee rinds and tofu pulp with PP plastic adhesive which aims to reduce the rate of deforestation due to tree felling as raw material for interior manufacturing and to control the environment by utilizing waste in the community into functional products. This study aims to determine the best formulation of particleboard made from Polyethylene plastic, coffee bean hulls and tofu pulp. Tofu dregs need to be preserved by soaking the dregs for 48 hours in a 5% glycerol solution and 15% NaCl solution in a 50:50 ratio. Then soaked for 48 hours. soaking 15.121%. To determine a good particleboard formulation, a physical evaluation of the particleboard was carried out including particleboard density test, water absorption test, moisture content test, thickness development test and instrumentation testing using SEM to see the surface structure of the particleboard.  Based on the results of physical testing, the best formulation of particleboard biocomposites was obtained, namely the ratio of 70:30 (% w/b) (70% of tofu pulp and coffee bean skin and 30% of PET plastic) which is in accordance with SNI 03-2105-2006 standards. Biocomposite particleboard formulation 70:30 (% w/b) has a density of 0.60186 gr/cm3, water absorption of 95.395%, moisture content of 2.248% and an increase in thickness after soaking of 15.121%.

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