Hydrogen: Jurnal Kependidikan Kimia
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.
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<![CDATA[Need Analysis for Development (E-Module) of Analytical Chemistry Integrated with Environmental Analysis Research Results ]]>
<![CDATA[Yulis, Putri Ade Rahma]]>;
<![CDATA[Oktariani, Oktariani]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 1 (2024): February 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i1.10601
<![CDATA[The current condition is still limited to analytical chemistry teaching materials that are integrated with research results, only using Analytical Chemistry textbooks as teaching materials or in the form of e-books. This is one of the causes of the lack of student interest in participating in the teaching and learning process. The purpose of this research is to produce innovative teaching materials in analytical chemistry based on research results, aiming to enhance students' interest in learning.This research is the initial stage as a basis for developing analytical chemistry e-modules integrated with research results. The development model used is ADDIE which consists of five stages, namely Analysis, Design, Development, Implementation and Evaluation. This research is limited to the needs analysis stage which includes RPS analysis, analysis of problems and needs of lecturers and problems and needs of students. Data collection instruments used interviews and questionnaires. The subjects of this study consisted of 6 Analytical Chemistry lecturers and 59 students from Riau Province, Riau Islands, North Sumatra, and West Java. The research results of this preliminary analysis include RPS analysis where there are 10 topics of study material and based on the needs questionnaire the topic of quantitative analysis is the topic with the highest percentage to be developed into an e-module. Then also obtained the results that there are still some shortcomings with the teaching materials used today, so that 98% of lecturers and students stated that they need the development of teaching materials, especially those that are digital-based and can be integrated with research results which are evidence of the implementation of analytical chemistry learning theory. ]]>
<![CDATA[Conducting Polymers for Wearable Sensors: A Bibliometric Analysis Using VOSviewer ]]>
<![CDATA[Mora, Abraham]]>;
<![CDATA[Aziz, Arrizal Abdul]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 1 (2024): February 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i1.10435
<![CDATA[The objective of this study is to conduct a bibliometric analysis using VOSviewer on the research progress of the conducting polymer for wearable sensors topic. Data was extracted from the Dimensions database from 2014 to August 2023. 268 Dimensions articles were relevant to the keywords. The title and abstract from the metadata were employed to be analyzed for co-occurrence using VOSviewer. As a result, 9544 terms were obtained through the search method, but only 184 met the threshold of 10 minimum occurrences in all retrieved articles and were selected for further analysis. There was a consistent upward trend in publication numbers between 2014 to August 2023. Based on the network visualization of keyword co-occurrence, it evidenced six clusters that group all specific keywords based on the common themes. The most recent keywords (occurred between 2021 and 2022) included conductive hydrogel, polymer hydrogel, flexible sensor, MXene, strain sensor, and stretchable strain sensor. Based on this study, it is suggested to discover more about conducting and flexible hydrogel materials and the possibilities to enhance the electrical and mechanical properties of conducting polymers by introducing MXene. The materials are viewed for applications such as flexible strain sensors and other wearable sensors.]]>
<![CDATA[Chemsitry Learning Outcomes of 11th Grade Science Students at SMAN 1 Rasau Jaya ]]>
<![CDATA[Fitrianti, Nenny]]>;
<![CDATA[Melati, Husna Amalya]]>;
<![CDATA[Rasmawan, Rahmat]]>;
<![CDATA[Sartika, Rody Putra]]>;
<![CDATA[Hadi, Lukman]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 1 (2024): February 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i1.10440
<![CDATA[This study discusses the ineffective chemistry learning process resulting in poor grades at State Senior High School (SMAN) 1 Rasau Jaya, students tend to receive information from the teacher without constructing their own knowledge, so students have difficulty in constructing the material obtained from the teacher. The purpose of this study is to describe the learning outcomes of students in 11th Grade Science Class odd semester in chemistry subjects at SMAN 1 Rasau Jaya. The form of research used in this research is descriptive research, and the type of research is a case study. Case study is one of qualitative research, in which researchers conduct in-depth exploration of programs, events, processes, activities, for one or more people. The subjects of this study were students of 11th Grade Science Class at SMAN 1 Rasau Jaya in the 2019/2020 school year who took the odd semester general test, totaling 93 students. The research process includes three stages, namely the preparation stage, the implementation stage, and the final stage. The data collection tool used is the odd semester general test score. Results and Discussion regarding Indicator 1: List the general formula of alkane, alkene and alkyne compounds, Indicator 2: Mention the law of conservation of energy, Indicator 3: Determine the number of moles from the results of the experiment, Indicator 4: Determine the value of the equilibrium constant Kc based on the reaction. The results of the general test conducted on 11th Grade students of SMAN 1 Rasau Jaya can be concluded that the learning outcomes of students in the class are not adequate.]]>
<![CDATA[Separation of Kaolinite from Clay Minerals and Its Catalytic Activity in Transesterification Reactions ]]>
<![CDATA[Rahayu, Rahayu]]>;
<![CDATA[Nengsih, Zarnida Widia]]>;
<![CDATA[Arief, Syukri]]>;
<![CDATA[Rilda, Yetria]]>;
<![CDATA[Alif, Matlal Fajri]]>;
<![CDATA[Syukri, Syukri]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 1 (2024): February 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i1.10600
<![CDATA[Kaolinite is a type of clay mineral that has the potential to be used as a heterogeneous catalyst in transesterification reactions. However, natural clay still contains a mixture of minerals that occur together. Therefore, as an effort to search for cheaper catalysts to reduce the price of biodiesel production, this study carried out the separation of kaolinite from natural clay and tested its performance as a catalyst in biodiesel production from Waste Cooking Oil (WCO). Separation of the kaolinite fraction was carried out with the help of NH4Cl as a dispersing agent. The main mineral composition of clay as quartz, kaolinite, montmorillonite and hematite. After the separation process, the crystallinity of the minerals experienced an increase marked by an increase in the intensity of several kaolinite peaks, namely in the 2θ 12.24° area from 103 to 108 and at 25.00° from 95 to 125. Thermal modification caused the loss of several kaolinite peaks in the area. 2θ 12.17°; 24.94° and 62.39°. The Si/Al ratio decreased after the fractionation and calcination processes. Average particle size of h-clay decreased from 27.61 µm to 21.09 µm in K-clay. The K-clay catalyst produced the highest conversion of palmitic acid at 42%, while c-K-clay produced the highest conversion of oleic acid and stearate at 30%. In addition, the density and water content of biodiesel catalyzed by K-clay and c-k-clay meet SNI standards. This finding has the potential to be further developed as a cost-effective catalyst based on natural resources in biodiesel production.]]>
<![CDATA[The Effect of Problem Based Learning (PBL) Learning Model on Students' Argumentation Ability on Salt Hydrolysis Material ]]>
<![CDATA[Prifes, Ramda]]>;
<![CDATA[Okmarisa, Heppy]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 1 (2024): February 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i1.10679
<![CDATA[The application of problem-based learning model teaches students how to deal with problems and find solutions by expressing opinions and providing logical justification for real problems, so it is expected to improve students' argumentation skills. This study aims to determine the effect of problem-based learning model on students' argumentation skills on salt hydolysis material. This study was carried out in the even semester of the 2022/2023 academic year at MAN 2 Kampar, class XI IPA.Pretest-posttest Non-Equivalent Control Grub Design was the experimental design for this study, which used quasi-experimental methods. The sample consisted of XI IPA1 students as the experimental class and XI IPA2 as the control class. Data collected to measure students argumentation skills through tests and observations and analyzed using t-test and coefficient of determination test in SPSS 24. In the t-test, the Sig (2-tailed) = 0.000 outcome is more modest than 0.05, and that implies H0 is dismissed and Ha is accepted. For the determination test, the value (r2) = 0.284 is obtained, it can be concluded that the problem-based learning model affects students argumentation skills on salt hydrolysis material by 28.4%.]]>
<![CDATA[Biosynthesis of Gold Nanoparticles Using Wuluh Star Fruit (Averrhoa bilimbi) for Chromium Analysis ]]>
<![CDATA[Dewi, Ria Kemala]]>;
<![CDATA[Firdaus, M. Lutfi]]>;
<![CDATA[Nursa'adah, Euis]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 1 (2024): February 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i1.10188
<![CDATA[One of the heavy metals that can pollute waters is the heavy metal chromium (Cr). Chromium has many important roles in life. Chromium material is widely used by humans for various purposes, especially in the industrial world. However, the large number of uses of chromium in the industrial world and the waste it generates can have a negative impact on the environment and human health. One way to deal with chromium pollution is by analyzing the presence of chromium in waters. The aim of this research is to analyze the presence of chromium using a simple, effective, economical and accurate method, namely the biosynthesis of gold nanoparticles using samples of starfruit (Averrhoa bilimbi) as a bioreductor rich in ascorbic acid, with a colorimetric method, namely a method based on the aggregation of gold nanoparticles with ascorbic acid from starfruit, which causes a shift in plasmons and causes color changes that can be seen by the eye. Based on the analysis results, data was obtained that gold nanoparticles synthesized from the starfruit bioreductor can detect chromium with a concentration of 10 ppm with optimum conditions at pH 5, temperature 75oC, optimum incubation time of 5 minutes and gold nanoparticles are selective and sensitive for detecting chromium.]]>
<![CDATA[Development of Science Process Skills Assessment Instruments in Environment Based Practicum on Reaction Rate Material ]]>
<![CDATA[Nurmala, Nurmala]]>;
<![CDATA[Sahputra, Rachmad]]>;
<![CDATA[Rasmawan, Rahmat]]>;
<![CDATA[Masriani, Masriani]]>;
<![CDATA[Melati, Husna Amalya]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 1 (2024): February 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i1.10441
<![CDATA[This study aims to produce an Environmental-Based Chemistry Practicum Assessment Instrument for Reaction Rate Material for 11th Grade of MA/ SMA. The development model used in this research is the development model according to Borg and Gall which consists of 4 stages: Potential and Problems, Gathering Information, Product Design, and Design Validation. The development in this study refers to the product produced in the form of an assessment instrument. which is measured until the validity of the expert where the validity aspects are based on the results of the experts' assessment validation questionnaire. The aspects assessed in the product of the environmental-based practicum performance instrument assessment instrument are the feasibility of instructions, content feasibility and language feasibility. The assessment instrument in this content aspect is arranged sequentially according to the practicum procedure. Based on the results of validation by validators, the linguistic aspect obtained a score with a percentage of 93%, then the linguistic aspect is divided into several assessment criteria, including the use of language in accordance with EYD, clarity of instructions and directions and the language used is straightforward and easy to understand Based on the results of validation by validators, the linguistic aspect obtained a score with a percentage of 91%. The validity level of the chemistry practicum performance assessment instrument measured practicum performance in the form of scores 1-4. Determination of the validity of the practicum performance assessment instrument is done by calculating the score given by the validator and analyzing the validator's suggestions and input on the instrument product assessment questionnaire sheet in the form of a check list. The results concluded that the student practicum performance assessment instrument was feasible to use.]]>
<![CDATA[The Modification of Eco-Enzyme Liquid and The Effect on Tomato Preservation with Soaking Then Rinsing in Water Method ]]>
<![CDATA[Yuliana, Meta]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 1 (2024): February 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i1.10593
<![CDATA[Tomatoes are the popular fruit but having short shelf life. This fruit require some treatment to maintain it’s quality during post-harvesting. Eco-enzyme is a fermented liquid, it’s made by fermentation process of fresh waste vegetables or fruits. Previous study showed that spraying tomatoes with Eco-enzyme can maintain the shelf life of tomatoes. This study aim to observe the effect of various liquid in Eco-enzyme fermentation and it’s effect to tomatoes preservation by soaking method. The research was experiment research using quality scale of tomatoes. The Eco-enzyme was fermented using different liquid such as water, coconut water and rice rinsed water. Tomatoes were soaked with each Eco-enzyme treatment with 50% and 100% concentration of each liquid for 5 minutes then rinsed them and observed their quality for 8 days during storage process. The control treatments are non-soaked and non-rinsed tomatoes. The observation include the quality of tomatoes and the quality of Eco-enzyme. The result of this study found that modification of liquid in Eco-enzyme fermentation have different effect for tomatoes preservation. Soaking and rinsing method also have different effect for tomatoes. The best treatment for EE1 is EE1-rinse-concentration 50%, EE2 is EE2-rinse-concentration 100%, and EE3 is EE3-rinse-concentration 50%. The soaking followed rinsing was the best method for tomatoes preservation treatment using Eco-enzyme.]]>
<![CDATA[Development of Acid-Base Titration Practicum Guide Using Natural Indicators of Butterfly Pea Flowers ]]>
<![CDATA[Hanifa, Suci Rahma]]>;
<![CDATA[Ardiansyah, Ardiansyah]]>;
<![CDATA[Afrianis, Neti]]>;
<![CDATA[Okmarisa, Heppy]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 1 (2024): February 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i1.10813
<![CDATA[Sustainable Development Goals (SDGs) need to be implemented to create environmentally friendly chemistry learning. This can be done in an acid-base titration experiment using natural indicators of butterfly pea flowers. This research aims to produce a practicum guide for acid-base titrations using natural indicators of butterfly pea flowers that are valid and practicum. The research design uses the ADDIE research design, namely Analysis, Design, Development, Implementation, and Evaluation. The research results showed that butterfly pea flowers can be used as a natural indicator for acid-base titrations with color changes from pink (acidic condition) to blue (basic condition). The resulting learning media is a practicum guide which has a validity of 92% (very valid) and a practicality level of 88.75% (very practical). This data was analyzed using qualitative and quantitative analysis. The practicum guide developed is valid and practical to use as a practicum learning media in schools.]]>
<![CDATA[Development of Chemistry Learning Media based on Joyful Learning with Snakes and Ladders Game on Stoichiometry material to Improve Student Learning Outcomes ]]>
<![CDATA[Janah, Miftakhul]]>;
<![CDATA[Mitarlis, Mitarlis]]>
<![CDATA[ Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 1 (2024): February 2024 ]]>
Publisher : <![CDATA[Universitas Pendidikan Mandalika ]]>
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DOI: 10.33394/hjkk.v12i1.10192
<![CDATA[This research aims to obtain chemistry learning media based on joyful learning with the snakes and ladders game on stoichiometric material that is suitable for use to improve student learning outcomes based on the validity, practicality and effectiveness of the game. The research method used is the research development (R&D) method with the 4D model by Tigharajan which consists of 4 main stages, define, design, develop and disseminate. However, the development of Joyful Learing-based Chemistry Learning Media with the Snakes and Ladders game has only reached the development stage. The research was carried out at Surabaya State University and SMA Negeri 1 Menganti Gresik. Test the game media using the One Group Pretest-Posttest Design system. Validity is obtained from the assessment of the stoichiometric snake and ladder game media by the validator. Practicality is obtained from the results of observing student activities, observing the implementation of learning activities, and student response questionnaires. Effectiveness is obtained from student learning outcomes. The results of the research show that chemistry learning media based on joyful learning with the snakes and ladders game on stoichiometric material is suitable for improving student learning outcomes with a feasibility score of ≥ 4 in the feasible to very feasible category. The practicality of chemistry learning media based on joyful learning with the snakes and ladders game on stoichiometric material to improve student learning outcomes is said to be suitable for use in terms of the results of observations of student activities which obtained a percentage of 96.81%, the results of observations of learning implementation obtained a percentage of 93.98%, and Student responses obtained a percentage of 91.52%. Then, the effectiveness of chemistry learning media based on joyful learning with the snakes and ladders game on stoichiometry material to improve student learning outcomes which was developed in terms of pretest and posttest scores was declared effective. This is shown by the N-gain score of all students being in the medium to high category and meeting the KKM value, with an average N-gain value of 0.79 with high criteria. This shows that the stoichiometric snakes and ladders game is declared suitable for use as a chemistry learning medium based on joyful learning on stoichiometric material to improve student learning outcomes.]]>
