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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 Influence of Solution Concentration and pH for Removal Indigo Carmine using Banana Stem as a Biosorbent Zein, Rahmiana; Arianti, Yuliana; Emriadi, Emriadi; Ramadhani, Putri; Fauzia, Syiffa
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.v11i6.9844

Abstract

The textile industry is one sector that generates effluent containing a significant quantity of pollutants, including dyes, and thus has an effect on the environment. Synthetic dyes, which are toxic and difficult to degrade, are utilized extensively in the textile industry. Therefore, a new study utilizes banana stems as a cost-effective biosorbent to remove indigo carmine dye. This research aims to investigate the use of banana stem waste as a bisorobent in batch method to adsorption indigo carmine dye. The optimal concentration and pH values are 2 and 900 mg/L, respectively. The interaction between the indigo carmine dye and the banana stems is suggested by the FTIR analysis.  The solution's indigo carmine dye may be adsorbed by banana stem.
Penerapan Green Chemistry Nomor 7 untuk Penurunan Kesadahan Air Thohir, Muhammad Bakhru
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.v11i6.9871

Abstract

Bojonegoro memiliki bentangan pegunungan kapur, sehingga banyak sumber air di sekitar gunung kapur yang memiliki kualitas buruk. Solusi untuk masalah kesadahan air adalah dengan menggunakan pemanasan, namun teknik ini gagal untuk senyawa refraktori. Selain dipanaskan, solusi lain adalah disaring dan ditambah arang aktif, namun masalahnya adalah banyak arang aktif yang produksinya masih menggunakan asam sintetik dan hal ini bertentangan dengan 12 prinsip green chemistry. Tujuan dari riset ini adalah mensubtitusi asam sintetik dengan asam bahan alam dan juga mengetahui signifikansi kerja dari asam bahan alam dalam aktivasi arang aktif. Subtitusi asam sintetik dengan asam bahan alam sebagai aktivator arang adalah keterbaruan dari riset ini, karena selama ini penelitian masih berfokus pada modifikasi asam, belum mempertimbangkan pentingnya penerapan 12 prinsip green chemistry.Penelitian ini diawali dengan produksi arang, lalu aktivasi dengan beragam asam, dan terakhir pengujian performa. Asam bahan alam didapat dari pasar pasar tradisional di Bojonegoro, sementara untuk sampel air sadar adalah sampel simulasi. Hasil dari riset adalah asam bahan alam dapat digunakan sebagai aktivator untuk mengaktivasi arang, hal ini terlihat dari hasil presentase kemampuan adsorbsi, didapatkan bahwa arang aktif yang diproduksi dengan Citrus aurantifolia S. dapat menurunkan sebanyak 29,05%; arang aktif dengan Averrhoa bilimbi L. sebesar 37,50%; dan dengan aktivator HCl sebesar 19,89%. Hasil yang didapat mengindikasikan bawah riset ini memenuhi prinsip nomor 7 dari 12 prinsip green chemistry pada bidang produksi arang aktif.
Identification of Secondary Metabolite Compounds from Melandean (Bridelian micrantha) Leaf Extract Bayani, Faizul; Kurniasari, Baiq Anting; Hamdani, Ade Sukma; Yuliana, Depi; Wahyuni, Ida; Mujaddid, Jamilul
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.v11i6.9879

Abstract

The Melandean plant or Bridelia micrantha (Hochst.) Baill is traditionally used by the community to treat various human diseases, such as poisoning, paralysis, digestive diseases, diabetes, syphilis, and other diseases. Bridelia micrantha is believed to have active chemical compounds in the form of secondary metabolites which are useful for treatment. This active chemical compound is contained in the roots, leaves, seeds, skin, stems, and fruit. Bridelia micrantha leaves were used as samples in this study to analyze the secondary metabolite compounds contained therein. Leaf extraction was carried out using 80% methanol solvent through a maceration process. Analysis was carried out qualitatively using the phytochemical screening test method and quantitatively using the thin layer chromatography test method. Based on the results of the phytochemical screening test carried out, it is known that Bridelia micrantha is positive for containing active compounds in the form of flavonoids, tannins, saponins, and alkaloids. The results of the thin layer chromatography (TLC) test showed that flavonoid compounds were found with an Rf value of 0.437, tannin compounds with an Rf value of 0.312, saponin compounds with an Rf value of 0.625, and alkaloid compounds with Rf values of 0.125, 0.187, 0.312 and 0.5.
The Effect of Different Extraction Methods on Total Tannin Content of Methanol Extract of Simpur Air Leaves (Dillenia suffruticosa) Wahyuni, Sri; Masriani, Masriani; Sasri, Risya; Sapar, Ajuk; Erlina, Erlina; Ersando, Ersando
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.v11i6.9897

Abstract

The use of metal mordants in fabric dyeing can harm the environment and health, so it is necessary to look for natural mordants that are more environmentally friendly. The utilization of Simpur Air leaves (Dillenia suffruticosa) as a biomordant is one of the efforts to produce a more environmentally friendly tannin mordant. D. suffruticosa has been reported to contain tannin compounds in all parts of the plant. However, scientific evidence of differences in the total tannin content of methanol extracts of D. suffruticosa leaves with various extraction methods have not been found so far. This study aims to determine the effect of different extraction methods on the yield value and total tannin content of methanol extracts of D.suffruticosa leaves using UV-Vis spectrophotometric method at a wavelength of 755.8 nm with Folin Ciocalteau reagent. D. suffruticosa leaves are extracted by using three methods, namely maceration, soxhletation and reflux. Tannic acid is used as a comparator. The results show that the yield value of D. suffruticosa leaves extracted by maceration, soxhletation and reflux methods were 8.35%; 12.26%; and 25.24%, respectively. The total tannin content of methanol extract of D. suffruticosa leaves with maceration method is 0.15% ± 0.007; soxhletation is 0.18% ± 0.007 and reflux is 0.21% ± 0.016.  Based on the results of the data analysis, the significance value <0.05 was obtained. It can be concluded that the extraction method affects the yield value and total tannin content of methanol extract of D. suffruticosa leaves.
Analisis Pendahuluan sebagai Dasar Pengembangan Modul Kimia Organik Bermuatan Hasil Riset untuk Mahasiswa Pendidikan Kimia Sari, Yelfira; Yulis, Putri Ade Rahma; Nabila, Putri; Pamayanti, Evi
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.v11i6.9907

Abstract

Penelitian pendahuluan ini bertujuan untuk memperoleh data awal yang akan digunakan sebagai dasar pengembangan modul pengajaran kimia organik yang berisi hasil-hasil penelitian bagi mahasiswa pendidikan kimia. Penelitian ini menggunakan model pengembangan ADDIE yang dilakukan sampai dengan tahap Analisis dengan tahapan berupa analisis Kurikulum dan RPS (Rencana Pembelajaran Semester), Analisis Dosen, dan Analisis Kemahasiswaan. Berdasarkan hasil kurikulum dan analisis RPS, mata kuliah kimia organik dipresentasikan dalam dua semester, yaitu Kimia Organik 1 dan Kimia Organik 2, yang secara umum terdiri dari 10 materi utama. Hasil wawancara dengan dosen pengajar menyatakan bahwa bahan ajar yang digunakan masih berupa PPT, sedangkan hasil analisis mahasiswa menyatakan bahwa sebanyak 52,6% mahasiswa menyatakan bahwa bahan ajar yang digunakan dosen tidak memenuhi kebutuhan mahasiswa dalam memahami materi pembelajaran. Sebanyak 84,2% mahasiswa membutuhkan bahan ajar lain untuk lebih memahami materi dalam mata kuliah kimia organik. Berdasarkan data tersebut dapat disimpulkan bahwa perlu dikembangkan bahan ajar berupa modul-modul terpadu hasil penelitian bagi mahasiswa pendidikan kimia.
Integrasi Mitigasi Bencana Global Warming pada Materi Pembakaran Hidrokarbon melalui Pendekatan RBL-STEAM Shabrina, Annida Nurul; Karyadi, Bhakti
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.v11i6.9911

Abstract

AbstractThe primary objective of this paper is to address the mitigation of disasters resulting from climate change and global warming. Such disasters are the result of increased greenhouse gas emissions, primarily caused by human activities like deforestation and the use of fossil fuels. To analyze the concept of hydrocarbon combustion from basic competencies (KD) 3.3 and 4.3 of chemistry class XI, we employed a qualitative descriptive method supported by a literature review. The paper investigates the relationship between climate change, the greenhouse effect, the carbon cycle, and their effects on the environment and health. Furthermore, it proposes a learning design that combines the Research-Based Learning (RBL) model with the STEAM approach to enhance students' comprehension of climate change, the consequences of hydrocarbon combustion, and emergency response measures. One of the highlighted learning strategies is the creation of an interactive and engaging mini park mockup to facilitate student understanding. The use of technology, specifically machine learning, is recommended for decision making in global warming disaster mitigation. This paper stresses the significance of integrating chemistry learning for knowledge and skills development in KD 3.3 and 4.3, and for understanding global warming and disaster mitigation efforts. The goal is to provide students with science literacy skills as well as the ability to identify concrete actions in reducing the negative impacts of climate change.
Decoding The Obstacles of 10th Grade Student Learning in Atomic Structure at SMAN 1 Sungai Tarab Nadila, Mutiara; Mawarnis, Elvy Rahmi
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.v11i6.10154

Abstract

This research uses qualitative research methods (descriptive). The subjects of this research were 10th grade students of Phase E.8 with a total of 28 students. Based on the research that has been done, it can be concluded that the results of the analysis of the types of learning difficulties and the factors that cause chemistry learning difficulties in 10th Grade students of atomic structure material at State Senior High School (SMAN) 1 Sungai Tarab are as follows. First, the types of chemistry learning difficulties consist of 3 types of difficulties including difficulty understanding terms with the highest percentage of 67.86% on the term atomic symbol, difficulty understanding concepts with the highest percentage of 67.86% on the concept of atomic structure according to Thomson and difficulty understanding numbers with the highest percentage of 64.28% on calculations or numbers looking for the number of values of atomic constituent particles (ions). Second, the factors causing chemistry learning difficulties consist of 2 factors, namely internal factors which include physical factors with a percentage of 32.14%, psychological factors with a percentage of 82.14% and emotional factors with a percentage of 71.43%, and external factors which include family factors with a percentage of 25%, school factors with a percentage of 35.71% and community factors with a percentage of 28.57%.
Higher Order Thinking Skills and Visual Representations of Chemical Concepts: A Literature Review Basimin, Mudzuna Quraisyah; Habiddin, Habiddin; Joharmawan, Ridwan
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.
Description of Students' Science Literacy Ability on Electrolyte and Non-Electrolyte Solution Materials at SMAN 11 Pontianak Puspita, Ninda Ikke; Junanto, Tulus; Harun, Andi Ifriany; Enawaty, Eny; Ulfah, Maria
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.v12i2.10176

Abstract

It is important for students to learn scientific literacy because it’s related to how students understand the environment and face issues in modern society. Students with excellent scientific literacy skills are able to apply the concepts and facts learned at school in everyday situations. The purpose of this research is to provide an overview of students’ scientific literacy at SMA Negeri 11 Pontianak. The research method used is descriptive research with a quantitative approach. The population under study consists of grade XI science students, including XI IPA 1, XI IPA 2, and XI IPA 3. Sample selection employs purposive sampling technique, considering specific factors such as students who have received instruction from teachers in the subject of electrolyte solutions and possess a good academic abilities. A total of 37 students from class XI IPA 2 are chosen as research samples. Data collection technique involves measurement and communications, utilizing instruments in the form of five essay questions that have been tested for validity. Based on the research data, it is known that aspect of explaining scientific phenomena reached 60,47%, while in determine the properties and samples of solutions from electrical conductivity experimental data, percentage is 75%. To provide conclusions and opnions on electrolyte test results from everyday life phenomena reached 61,93%. If averaged, overall, students’ scientific literacy skills are in the moderate category, with an average score of  65,251%.
Biosynthesis of Gold Nanoparticles Using Wuluh Star Fruit (Averrhoa bilimbi) for Chromium Analysis Dewi, Ria Kemala; Firdaus, M. Lutfi; Nursa'adah, Euis
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 1 (2024): February 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i1.10188

Abstract

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.

Page 42 of 62 | Total Record : 618

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