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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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Higher Order Thinking Skills and Visual Representations of Chemical Concepts: A Literature Review Mudzuna Quraisyah Basimin; Habiddin Habiddin; Ridwan Joharmawan
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 6 (2023): December 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i6.10173

Abstract

Efforts to assist students in understanding generally abstract chemical concepts are widely done using visual representations as a form of multiple representations in chemistry. This article evaluates and identifies articles from the year (2013-2023) through search engines that provide international services and national journal pages that can be accessed using 4 databases, namely, science direct, eric, google scholar, and crossref. Based on predefined criteria for the use of visual representation in chemistry to improve Higher Order Thinking Skills, 13 relevant articles were obtained. The results of the review show that visual representation can be utilized to train and improve higher-order thinking skills, especially critical, logical, reflective, metacognitive, and creative thinking. Visual representation has also been applied to several approaches or learning models such as Multiple Representation, Particulate Representation, 5R, SWH, Marzano's Taxonomy, Use of Concept Maps, and PcBL.
Determination of Total Tannin Content from Methanol Extracts of Various Species of Ferns (Pteridophyta) Hariyanti, Weni; Masriani, Masriani; Sasri, Risya; Sapar, Ajuk; Erlina, Erlina; Ersando, Ersando
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 2 (2024): April-May 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i2.11597

Abstract

AbstractThe use of heavy-metal mordants in fabric dyeing is prohibited due to the resulting impacts such as environmental damage and public health, therefore environmentally friendly and non-toxic mordants such as tannin mordants (biomordants) are needed. Based on phytochemical screening on fern species (Pteridophyta), it is known that they contain tannins. However, scientific evidence of determining the total tannin content of various species of ferns has so far not been found. This study aims to determine the yield and total tannin content of methanol extracts of five fern species, namely paku kawat (Lycopodium cernuum), paku resam (Gleichenia linearis), paku dayak (Blechnum orientale), paku uban (Nephrolepis biserrata), paku miding (Stenochlaena palustris). Sample extraction was carried out by maceration method using methanol solvent. Extract yield was determined by weighing method. Analysis of total tannin content was carried out by UV-Vis spectrophotometric method at a wavelength of 755.8 nm using Folin-Ciocalteu reagent and sodium carbonate. The results of the research obtained the yield of methanol extracts on paku kawat, paku resam, paku dayak, paku uban, and paku miding are 11.271%; 8.389%; 4.810%; 3.615%; and 0.854%, respectively. Total tannin levels in methanol extracts of paku kawat, paku resam, paku dayak, paku uban, and paku miding were 0.024% ± 0.002; 0.256% ± 0.029; 0.272% ± 0.037; 0.143% ± 0.019; and 0.022% ± 0.012, respectively. Based on these data, it can be concluded that the methanol extract of paku kawat produces the highest yield while paku dayak produce the highest total tannin content. The results indicate that differences in fern species cause differences in tannin levels.  
Application of Problem-Based Worksheets to Develop Higher Order Thinking Skills In The Utilization of Coconut Shells As Zn Metal Adsorbent In Laboratory Waste Lestari, Risma; Sukmawardani, Yulia; Subarkah, Cucu Zaenab; Farida, Ida
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 4 (2024): August 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i4.12191

Abstract

This study aims to analyze scientific performance and analyze students' higher-order thinking skills after the application of problem-based LK to develop higher-order thinking skills in the use of coconut shell as an adsorbent for Zn metal in laboratory wastewater. The research method used is pre-experiment with one shot case study design. The subjects in this study were chemistry education students of UIN Sunan Gunung Djati Bandung who took separation chemistry courses. The instruments used are learning descriptions, LK, and higher order thinking skills questions. Students' higher-order thinking skills are measured through working on six HOTS questions based on the concept of Bloom's taxonomy level of thinking at cognitive levels C4 (analyze), C5 (Evaluate) and C6 (Create). The results showed that the average value of student performance in solving problem-based LK was 88.35 with a very good category. The highest average score achieved was at stage 2 organizing students with a score of 91.5 and a very good category. The lowest average value at stage 4 develops and presents results with a value of 86.25 and a very good category. The results of students' higher order thinking skills obtained an average score of 78 in the good category. Thus the application of problem-based LK on the utilization of coconut shell as a heavy metal adsorbent in laboratory wastewater can develop higher order thinking skills in students.
Determination of Tannin Content in Matoa Plants (Pometia pinnata) Based on Variations in Leaf Age Ulandari, Uci; Masriani, Masriani; Sasri, Risya; Ersando, Ersando
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 4 (2024): August 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i4.12583

Abstract

The growth of the textile industry contributes significantly to environmental pollution from dye waste. The use of natural dyes from plants could be a solution to this problem, although they have weaknesses such as easy fading and less stable colors. Therefore, to improve color stability, a mordant is needed as a color fixative. Biomordants are mordants derived from plants that can be used as substitutes for metal mordants to bind dye to fabric fibers. Matoa leaves are one of the plants with the potential to be used as a biomordant because they contain tannin compounds. This study aims to determine the tannin content of methanol extracts of matoa leaf with various leaf age variations that can be used as a biomordant. The old and young matoa leaves were macerated with methanol for 3 days. The tannin content was determined using the Folin Ciocalteu method using a spectrophotometer Ultra Violet (UV) dual beam with positive control of tannic acid at a wavelength of 755.8 nm. The yield of methanol extract from old matoa leaves was 5.42% and from young matoa leaves was 8.58%. Phytochemical screening of methanol extract of old and young matoa leaves revealed the presence of secondary metabolite content of tannins, phenolics, flavonoids, saponins, triterpenoids, and alkaloids. The total tannin content of methanol extract from old matoa leaves was 0.37% ± 0.03, lower than that of young matoa leaves, which was 0.44% ± 0.06. Based on this research, it can be concluded that matoa leaves contain tannins and have the potential to be used as a biomordant.
Transforming the Chemistry Education Curriculum: Students’ Creativity Using AI in Lectures Farwati, Ratna; Sari, Indah; Fadhilah, Geby Ayu
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 4 (2024): August 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i4.12569

Abstract

This Research examines of The Usage of Artificial Intelligence (AI) such as ChatGPT and alike of that by Chemistry Education students in the learning process, and provides recommendations for the transformation of the chemistry education curriculum. The results of a survey of 76 students from universities in Palembang and Serang show that ChatGPT and similar AI have become important tools in supporting academic activities, especially in understanding chemistry concepts, compiling reports, and conducting research. However, students face several problems, including the cost of use, lack of knowledge about AI, limited access, and operational difficulties. Therefore, this study recommends the integration of AI into lecture materials, the provision of comprehensive training, increasing access and technical support, and periodic evaluation and adjustment of the curriculum.
Development of Augmented Reality Technology Integrated Learning Media on the Topic of Chemistry and Matter Liza, Wira Rahma; Guspatni, Guspatni
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 4 (2024): August 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i4.12230

Abstract

Augmented Reality (AR) technology allows interaction between the real world and objects in the virtual world in a three-dimensional form. With these advantages, AR will be a learning media that can increase students' enthusiasm for learning chemistry, especially on abstract chemistry concepts, and require the right learning media to visualize them. This type of research is Educational Design Research with the Plomp development model. The subjects of this study are UNP chemistry lecturers, chemistry teachers, and students at three senior high schools in Sumatera Barat. The object of this study is an augmented reality integrated learning media. The research instruments used were a needs analysis questionnaire, a validity test questionnaire, and a practicality test questionnaire. The data analysis technique uses the Aiken'V formula. The study results show that the developed learning media is included in the valid and practical categories with the validity values of content, construction, and quality respectively being 0.87; 0,85; and 0.85. Meanwhile, teachers' and students' average practicality score index results were 0.97 and 0.92. Thus, the learning media integrated with augmented reality technology in the chemistry concept for the E phase of SMA/MA chemistry has been successfully developed, validated, and practically used in learning.
Science Teachers' Perceptions The Merdeka Curriculum Implementation In Entikong Border State Junior High Schools Kusudaryani, Praditya Adi; Hairida, Hairida; Masriani, Masriani
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 4 (2024): August 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i4.12585

Abstract

Merdeka Curriculum emphasises the implementation of differentiated learning and considers the unique characteristics of each student. Teachers have an important role in the development and implementation of this curriculum, and must have interpretations in accordance with the provisions of curriculum development. Teachers' perceptions of the Merdeka Curriculum are very diverse and can significantly affect the readiness and quality of learning to be carried out. This study aims to determine teacher perceptions based on aspects of cognition, affection, conation. This research uses a qualitative descriptive method with data collection techniques using questionnaires, in-depth interviews, and documentation. The research questionnaire used is an open question that has been validated for content by 3 Merdeka Curriculum experts and validated for items by Merdeka Curriculum experts and Educational Psychology Experts. The results showed that teachers' perceptions are very important in implementing the Merdeka Curriculum, cognition about general concepts is positive, but for in-depth concepts, teachers' perceptions are negative. Schools that provide gradual training have succeeded in building teachers' positive cognition, although many still think that teaching modules are the same as lesson plans from the 2013 Curriculum. Teachers support the development of Merdeka Curriculum even though they feel there are limitations in understanding and readiness of infrastructure in schools. Teachers are also positive about the support and cooperation between teachers, especially through MGMP, but still feel that they are not fully capable of making their own learning tools. Although the teaching modules are in accordance with the provisions, teachers have not fully implemented differentiation plans or utilised the results of learning style diagnosis in learning.
The Relationship Between Metacognitive Ability and Self-directed Learning of Chemistry Education Students as Prospective Teacher Candrawinata, Natalia; Erlina, Erlina; Ulfah, Maria
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 4 (2024): August 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i4.12349

Abstract

Metacognitive ability and self-directed learning are crucial aspects to consider because good metacognitive skills are closely linked to academic success and self-directed learning. Students with strong metacognitive abilities are generally more capable of planning, monitoring, and evaluating their learning activities effectively. This study utilized a descriptive quantitative method with a correlational approach to examine the relationship between two variables: metacognitive ability and self-directed learning. The research was conducted in the Chemistry Education Program at FKIP Untan, focusing on 51 sixth-semester students for the academic year 2023/2024. Data were collected through indirect communication methods using the MAIT-18 and a self-directed learning questionnaire. The data analysis used descriptive statistical methods. The results indicated that the percentages of metacognitive ability and self-directed learning among sixth-semester Chemistry Education students were 79% and 68%, respectively. The Spearman Rank correlation test revealed a significance value of 0.478 >  0.05. Therefore, H0 is accepted and Ha is rejected, indicating that there is no significant relationship between metacognitive ability and self-directed learning among the students of the Chemistry Education Program at FKIP Untan.
Analysis Antioxidant of Fractions Cocoa Beans (Theobroma Cacao L.) as Potential Herbal Medicine Wibawa, Agung Ari Chandra; Pramitha, Dewa Ayu Ika; Sanjiwani, Ni Made Sukma; Adrianta, Ketut Agus
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 4 (2024): August 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i4.12548

Abstract

The cocoa seeds of the Gumbrih-Bali region are a natural commodity with great potential for development or processing by local communities. The purpose of this research is to provide information about the antioxidant potential contained in cocoa seeds. Testing the antioxidant capacity in this study uses the Uv-Vis spectrophotometry method at 517 nm wavelengths. Free radical scavanger is measured with control absorption and samples was analyzed with regression curve. The research results proved that the antioxidant (AAI) in the n-butanol fraction show result very strong ability of 4.64 compared to the 0.42 ethyl acetate fraction and 0.46 n-hexane fraction. These results prove that the potential chemical content of cocoa seeds is high in polar solvents (n-butanol fractions) such as flavonoid compounds. Furthermore, this research will be used as a basis for developing natural herbal ingredients such as cocoa which can be consumed in the community to prevent degenerative diseases.
Meta Analysis: The Effect of Project-based Learning on Students’ Learning Outcomes in Chemistry Learning Desyafrianti, Vanny; Aini, Faizah Qurrata
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 4 (2024): August 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i4.12315

Abstract

One of instructional model which can be implemented in Merdeka Curriculum is Project-based Learning (PjBL). In this model, students design a project based on their contextual understanding, thus having an impact on learning outcomes especially in knowledges aspect. Using meta-analysis with PRISMA method, researchers have traced various research articles and proceedings from 2020 to 2024 by using Publish or Perish with the keywords “project-based learning”, “learning outcomes”, “chemistry”, “pjbl”, “hasil belajar”, “kimia”. There are 200 articles found, after going through several stages there are seven articles that are the subject of this research. By calculating the effect size value of each study, the average effect size result was 1.1825 which was included in the high category. For summary that, the Project-based Learning model has an affect on student learning outcomes in chemistry learning, especially on the topics of acids and bases, colloids, chemical equilibrium, chemical bonds, solutions and thermochemistry.

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