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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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Effect of Brix Concentration and pH of Molassses Media on Ethanol Yield in The Fermentation Process at PT. Indo Acidatama. Tbk Hutapea, Henny Parida; Ahmadi, Panji
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 3 (2024): June-July 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i3.11668

Abstract

PT. Indo Acidatama Tbk. is a company that produces ethanol. Ethanol is produced by fermentation using molasses derived from sugar processing waste. To get the optimal ethanol content, it can be determined from the yield produced, it is necessary to have effectiveness in the fermentation process. In this experiment, the fermentation process was carried out with variations in molasses concentration and pH. The aim was to determine the combination of brix concentration and molasses pH in producing the most effective ethanol yield. The concentration of molasses used was 16 obrix, 20 obrix and 24 obrix. While the pH used was 4, 5 and 6. In the determination of the ethanol content, the separation was carried out by a distillation process, then the distilled ethanol was tested using a spindle alcoholmeter and a chromatographic test was carried out using a Gas Chromatography type 6890N. After getting the ethanol content, the next step is to determine the yield by using the alcohol content calculation. The results of the chromatography test obtained samples of 24 obrix variations and pH 4, getting the highest concentration, which was 3.05%. From the calculation of alcohol content, the sample variation of 16 obrix and pH 5 got the highest yield value, with an average of 26.74. From the results of the Two-Way ANOVA calculation, it was found that obrix and pH had a significant effect on ethanol yield.
Inquiry Ability Profile of SMAN 8 Pontianak Students on Salt Hydrolysis Subject Material Fifi Alaida; Erlina Erlina; Ira Lestari; Rachmat Sahputra; Maria Ulfah
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 5 (2023): October 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i5.8767

Abstract

The inquiry ability is an ability to obtain information through observation or experimentation to solve a problem by using critical and logical thinking skills which include several stages, namely the stages of formulating problems, formulating hypotheses, analyzing data, and concluding. This study aimed to determine student’s ability to inquire about the salt hydrolysis material at SMAN 8 Pontianak. The type of research used is descriptive research using the case study method. The research subjects were 20 students of class XI science at SMAN 8 Pontianak. The instrument used is an inquiry-ability test in the form of 4 essay questions and interview guidelines as a supporting instrument. The results showed that the average ability to inquire of students was included in the good category. The results of the analysis on each aspect stated that the average student inquiry ability in the aspect of formulating problems obtained a value of 80.6% and was classified as a good category. The aspect of formulating a hypothesis has an average value of 73% with a good category. The aspect of analyzing the data has a value of 55.8% with a fairly good category. While the aspect of formulating conclusions has a value of  60.6% with a fairly good category.
Chemsitry Learning Outcomes of 11th Grade Science Students at SMAN 1 Rasau Jaya Fitrianti, Nenny; Melati, Husna Amalya; Rasmawan, Rahmat; Sartika, Rody Putra; Hadi, Lukman
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.v12i1.10440

Abstract

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.
Development Of Teaching Material To Support Merdeka Curriculum On Stoichiometry For Phase F Damiyanti, Damiyanti; Mawardi, Mawardi; Suryani, Okta
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 3 (2024): June-July 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i3.11687

Abstract

This study aims to develop teaching materials to support merdeka curriculum learning on stoichiometry material phase F SMA / MA. This research uses the Eduactional Design Research (EDR) method with the Plomp development model which consists of three stages, namely the preliminary research stage, the development or prototyping phase, and the trial and assessment phase. Data collection was carried out using validity and practicality questionnaires. The subjects of this study were three chemistry lecturers, two chemistry teachers and nine students with high, medium and low ability levels. The validity questionnaire was given to three chemistry lecturers and two chemistry teachers while the practicality questionnaire was given to two chemistry teachers and nine students. The results showed that the validity test obtained a validity value of 88% which was declared a valid category. While the results of the practicality test for chemistry teachers obtained a value of 91% which was declared a very practical category and the results for students obtained a value of 93% which was declared a very practical category. Based on the results of the study, it was found that the development of teaching materials to support merdeka curriculum learning in SMA/MA phase F stoichiometry material was valid and practical
Separation of Kaolinite from Clay Minerals and Its Catalytic Activity in Transesterification Reactions Rahayu, Rahayu; Nengsih, Zarnida Widia; Arief, Syukri; Rilda, Yetria; Alif, Matlal Fajri; Syukri, Syukri
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.v12i1.10600

Abstract

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.
Development of an Interactive Multimedia Based E-modul on Geometric Isomer Material Zakaria, Andi; Enawaty, Eny; Lestari, Ira; Muharini, Rini; Erlina, Erlina
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.v12i2.11171

Abstract

Research and development of interactive multimedia based e-modules on geometric isomers material has the aim of determining the validity and response of students to interactive multimedia based e-modules on geometric isomers material. This e-module was developed to help students study geometric isomers material. This research uses the Research and Development (R&D) method with the ADDIE model. Validation techniques were analyzed using Content Validity Ratio (CVR) and Content Validity Index (CVI). Collecting data from student response questionnaires uses measurement techniques with indirect communication. The results of product validation from every aspect, both in e-modules and interactive videos, obtained a CVI value of 0.99 and were declared valid and suitable for use. The results of the student response questionnaire in the initial field test reached an average of 89.72% in the very good category and the main field test reached an average of 88.16% in the very good category.
Pengembangan VOLTA (Video Lagu Teori Kimia) pada Materi Teori Asam Basa dengan Strategi Chunking Khezya Merary Winel; Rahmat Rasmawan; Maria Ulfah; Tulus Junanto; Andi Ifriany Harun
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.v11i6.9200

Abstract

Pembelajaran kimia, yakni materi asam basa, dinilai sulit bagi siswa. Permasalahan ini ditemukan mengacu pada wawancara kepada guru dan siswa SMAN 2 Nanga Pinoh. Untuk mengatasi hal ini, media pembelajaran yang membantu siswa memahami dan mengingat materi, sesuai dengan karakteristik siswa sangatlah diperlukan. Tujuan penelitian ini yaitu untuk menghasilkan produk berupa VOLTA (Video Lagu Teori Kimia) pada Materi Teori Asam Basa dengan Strategi Chunking. Metode yang terapkan yakni penelitian dan pengembangan dengan model ADDIE yang terdiri dari tahap Analysis, Design, Development, Implementation, dan Evaluation. Penelitian ini hanya dilakukan hingga tahap Development. Video Lagu Teori Kimia pada materi Teori Asam Basa yang diujicobakan kepada siswa kelas XII SMA Negeri 2 Nanga Pinoh yang telah mempelajari materi teori asam basa merupakan subjek penelitian ini. Alat pengumpulan data berupa lembar penilaian kelayakan dan angket respon siswa. Penelitian ini menghasilkan media VOLTA (Video Lagu Teori Kimia) pada materi teori asam basa. Hasil validasi produk dari aspek materi dan media serta musik, masing-masing memperoleh skor 94,98% dan 96,08% sehingga sangat layak untuk digunakan. Hasil angket respon siswa pada uji respon awal dan utama mencapai rata-rata 89,09% dan 93,63% dengan kategori sangat baik. Disimpulkan bahwa VOLTA (Video Lagu Teori Kimia) pada materi teori asam basa dengan strategi chunking sangat layak digunakan sebagai media pembelajaran.
Cytotoxic Activity of Gude Leaves (Cajanus cajan) using The Brine Shrimp Lethality Test (BSLT) Method Emelda, Andi; Hasnaeni, Hasnaeni; Ulfa, Amanda
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.v12i2.11077

Abstract

Gude Leaves (Cajanus cajan) are a traditional medicinal plant for treating diarrhea. The ingredients contained in Gude leaves are flavonoids, such as kajanol, quarcetin and luteolin and also contain other secondary metabolites, tannins, saponins, alkaloids, terpenoids and phenols. Scientifically, Gude leaves have antimalarial, antidiabetic, anthelmintic, antioxidant, antibacterial and anticancer activity. This research aims to determine the toxicity of gude leaves (C. cajan) using the Brine Shrimp Lethality Test (BSLT) method. This research began by carrying out two extraction methods, namely maceration and UAE (Ultrasonic Assisted Extraction) on samples of gude leaves using 70% ethanol solvent. Then a phytochemical screening was carried out which showed that samples of gude leaves contained alkaloids, flavonoids, steroids, saponins and tannins. Experimentation the toxicity of gude leaf extract using maceration and UAE methods on Artemia Salina Leach larvae, each divided into 5 test groups, namely 4 treatment groups (concentrations of (250 ppm,  LC=23,33% & 33,33%) ; (500 ppm, LC= 56,67% & 60%); (750 ppm, LC= 70% & 73%); and (1000 ppm, LC= 80%) and 1 positive control group (sea water ). The research results can be seen through probit analysis by calculating the LC50 value. The LC50 value of gude leaf extract using the maceration method was 242.52 and the result of gude leaf extract using the UAE method was 394.16 (Toxic).  This research provides information regarding the toxic effects of gude leaf extract.
The Influence of Solution Concentration and pH for Removal Indigo Carmine using Banana Stem as a Biosorbent Rahmiana Zein; Yuliana Arianti; Emriadi Emriadi; Putri Ramadhani; Syiffa Fauzia
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.
The Effect of Problem Based Learning (PBL) Learning Model on Students' Argumentation Ability on Salt Hydrolysis Material Prifes, Ramda; Okmarisa, Heppy
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.v12i1.10679

Abstract

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%.

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