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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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Clean Water Quality Analysis based on Chemical Parameters at the Taha Qur'an Education Park Bima Regency Azwaruddin, Azwaruddin; Abdullah, Taufik; Wahyuningsih, Sri
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.v12i2.11321

Abstract

Unclean water is the cause of skin diseases. Skin diseases are included in water washed diseases which are influenced by the environment and human behavior. The water source at the Taha Qur'an Education Park is a drilled well, this water source is close to the residents' livestock pens which can be a source of pollution. The aim of the research is to determine the quality of clean water in the Taha Qur'an Education Park. Type of qualitative descriptive research. The population in this study was all the water taps in the Taha Qur'an Education Park. The number of samples was 2 samples. Based on Minister of Health Regulation number 32 of 2017, the results of water chemistry quality tests from the results of pH measurements on samples from Tap A were 7.5 and on samples from Tap B were 7.5, which is based on Regulation of the Minister of Health of the Republic of Indonesia Number 32 of 2017. Quality standard values for pH it is 6.5-8.5, while for checking Detergent levels in clean water the results obtained for tap A samples are 0.03 Mg/L and for Tap B samples it is 0.02 Mg/L, which is based on the Minister of Health Regulation Republic of Indonesia Number 32 of 2017 The quality standard value for Detergents is 0.05 Mg/L. It is hoped that the management of the Taha Qur'an Education Park will continue to maintain the quality of clean water in the Taha Qur'an Education Park, Bima Regency.
Investigating the Meaningful Learning in Chemical Separation Practicums: A Quantitative Approach Amat, Amat; Erlina, Erlina; Ira Lestari, Ira Lestari; Masriani, Masriani; Maria Ulfah, Maria Ulfah
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.v12i2.11323

Abstract

Meaningful learning has an important element that is finding advantages in obtaining various information comprehensively, thereby ultimately improving learner’s abilities. This aspect can provide information to understand and enhance meaningful learning. The purpose of this research is to analyze meaningful learning in the chemical separation practicum for the Chemistry Education students at FKIP UNTAN. The type of research used is quantitative descriptive with a survey method. Data collection tools in this analysis are questionnaires and interview guidelines. The questionnaires and interviews were administered after the practicum was completed. The number of students for the questionnaire was 59 people consisting of 26 people who were interviewed, including course instructors, laboratory heads, laboratory assistants, and student representatives from classes A1, A2, A3. The research results, in terms of the affective aspect, were 64% in the good category. In terms of the cognitive aspect, a percentage of 73% was achieved in the good category, while the affective-cognitive aspect had a percentage of 66% in the good category. Based on the data obtained, it can be concluded that learning in this chemical separation practicum is meaningful.
Identification of Antioxidant Activity of Bridelia Micrantha Bark Using the DPPH Method Bayani, Faizul; Rosmayanti, Baiq; Hamdani, Ade Sukma; Bimaharyanto, Deden Eka; Hulyadi, Hulyadi
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.v12i2.11346

Abstract

This research aims to identify the antioxidant activity of Bridelia micrantha stem bark using the DPPH method. This research is a laboratory experimental research. Antioxidant activity was measured using the DPPH (2,2-diphenyl-1-picrylhydrazyl) method. Melandean Bark Extract is made using the maceration method with 80% methanol solvent. Identification of antioxidant activity was carried out at concentrations of 20 ppm, 40ppm, 60ppm, 80ppm, and 100ppm. Vitamin C was used as a positive control. Absorbance measurements were carried out using a UV-Vis spectrophotometer at a wavelength of 517nm. The test results in this research showed that the IC50 value of melandean bark extract was 85.54 ppm. Melandean bark extract is classified as a strong antioxidant.
Comparison of Ethanol Levels in Yellow and Red Watermelon Wine Tan, Andreas Felix; Manao, Mutiara Angelina; Delviyanti, Maria Novia; Honesty, Pricillia Pretty Septy; Hapsari, Natalia Diyah
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.v12i5.11464

Abstract

Watermelon is one of the tropical fruits that has high water and sugar content. However, the selling price of watermelon is still relatively low, and there is limited processing variation. By utilizing the high water and sugar content in watermelon to create an alcoholic beverage, wine is one promising form of innovation. The aim of this research is to determine the difference in alcohol content of wine made from yellow and red watermelon. The samples used in this study were yellow and red watermelons. Yellow and red watermelons fermented with Saccharomyces cerevisiae yeast to transform them into wine. The ethanol content in wine and red watermelons was analyzed using GC-MS instruments. Subsequently, the soluble sugar content, pH, IR spectra, as well as the color, taste, and aroma of the wine also analyzed. The research results show that the average ethanol content of yellow and red watermelon wines is 7.59% and 6.61% respectively. The average soluble sugar content in yellow and red watermelon wines is 8.6% Brix and 12.64% Brix, respectively. The pH value of each wine sample is 4, and the IR spectra of each wine sample indicate the presence of stretching OH groups. In conclusion, red watermelon wine has a lower ethanol content than yellow watermelon wine.
Validity Test of E-LKPD to Improve Students' Argumentation Skills on Chemical Equilibrium Material Andreani, Lucky Arthamevia; Yonata, Bertha
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.v12i3.11500

Abstract

Dalam bidang pendidikan kimia, peserta didik diharapkan dapat mengembangkan keterampilannya sesuai dengan keterampilan yang dibutuhkan pada abad ke-21. Salah satu kompetensi kerangka 4C adalah berpikir kritis dan keterampilan komunikasi. Kedua kompetensi ini dikemas menjadi satu kesatuan dalam keterampilan argumentasi. Keterampilan argumentasi berperan dalam melatih siswa mengembangkan kemampuan berpikirnya sehingga meningkatkan pemahamannya. Tujuan penelitian ini adalah mengembangkan e-LKPD yang valid untuk meningkatkan kemampuan argumentasi siswa dalam konteks kesetimbangan kimia. Metodologi penelitian yang digunakan dalam penelitian ini adalah Research and Development (R&D) dengan menggunakan model pengembangan 4D yang dikemukakan oleh Thiagarajan, yang meliputi tahapan sebagai berikut: pendefinisian, perancangan, pengembangan, dan penyebaran. Namun penelitian ini hanya sebatas tahap pengembangan dengan uji coba terbatas untuk mengetahui kelayakan produk. Keterbatasan ini didasarkan pada beberapa pertimbangan antara lain waktu, tenaga, dan kendala. Validasi dilakukan oleh tiga orang validator yang terdiri dari dua orang dosen program studi pendidikan kimia dan satu orang guru mata pelajaran kimia. Skor validitas yang dihasilkan kemudian dianalisis menggunakan metode mode. Hasil penelitian menunjukkan bahwa E-LKPD valid ditinjau dari validitas isi. Nilai modus untuk kategori ini adalah 5 yang menunjukkan hasil yang sangat valid
Development of Merdeka Curriculum Teaching Module Based on Problem Based Learning Acid-Base Material Lusianti, Lusianti; Enawaty, Eny; Ulfah, Maria; Hairida, Hairida; Erlina, Erlina
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.v12i4.11508

Abstract

Teachers experience difficulties in designing teaching modules in the independent curriculum and teachers need differentiated teaching modules. This research aims to develop an Merdeka Curriculum Teaching Module Based on Problem Based Learning on Acid and Base Material and determine the feasibility of the teaching module and the teacher's response to the teaching module. The research method used is Research and Development (R&D) with the ADDIE model limited to the development stage. The subject of this research is the Independent Curriculum teaching module based on Problem Based Learning on acid base material. The research instrument used was a questionnaire. This questionnaire is used to validate the product and test teacher responses using a Likert scale. The data collection technique used was indirect communication techniques by providing questionnaires. Data from product validation results were analyzed using Gregory with validation results from the material aspect of 1 and the media aspect of 1 with the high validity category. Then a trial was carried out with a response test carried out on 2 chemistry teachers. The teacher response test results obtained a percentage of 100%. This shows that the Merdeka Curriculum teaching module based on problem-based learning on acid-base material meets appropriate for use as a teaching tool.
Chemical Concepts Related to the Context of Palm Oil Production Process for Contextual Chemistry Learning based on Local Natural Resources Shalsabila, Syifa Yulia; Kusumaningtyas, Pintaka; Erika, Farah
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.v12i4.11520

Abstract

Chemistry learning oriented to local natural resources around students presents real situations that can help students to understand the concepts of learning material being studied. This research aims to identify the chemical concepts involved in the process of palm oil production for developing contextual chemistry learning materials based on local natural resources. This research used descriptive quantitative research. Data were collected from field observation, literature study and documentation study. The relevance of chemical concepts and the context of palm oil processing were assessed by the validators. Based on the finding, there are 3 chemical concepts related to the palm fruit processing into crude palm oil (CPO), namely: classification of matter,change of matter, and separation of mixture. The relationship between both of these three chemical concepts and the context of palm oil processing has been declared highly valid with a score of 3.75 by the validators. Therefore, the processing of palm fruit into CPO can be used as a learning resource for contextual chemistry learning material in the implementation of Merdeka curriculum at phase E.
Validity of Electronic Worksheet (E-LKPD) Based on PBL Model to Train Creative Thinking Skills on Acid-Base Material Ainiah, Errisya Nur; Yonata, Bertha
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.v12i3.11587

Abstract

Creative thinking skills are important to train students to face the challenges of the 21st century and include higher order thinking skills. In addition, the independent curriculum provides freedom to think and innovate in learning. Therefore, one of the efforts to train creative thinking skills is to use relevant learning media, namely E-LKPD based on the Problem Based Learning (PBL) model. The purpose of this research is to produce PBL-based E-LKPD to train the creative thinking skills of grade XI students on acid-base material that is feasible to use, in terms of validity.  This research model is guided by Thiagarajan's 4D model (Define, Design, Develop, and Disseminate). However, the research only reached the development stage (Develop) to determine the validity of the product because there were limitations in time, funds, and energy. Validation was conducted by 3 validators to measure the content and construct validity of the developed E-LKPD. The results showed that the validity of the E-LKPD was considered valid based on the median score of content validity of 4 with a valid category and construct validity of 5 with a very valid category.
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.  
Eco-Dyeing of Timor Woven Fabrics using Pterocarpus Indicus Bark Tannin as a Natural Mordant Adu, Risna Erni Yati; Fay, Angela Desy Putry; Tea, Marselina Theresia Djue
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.v12i4.11640

Abstract

Pterocarpus indicus is a tropical wood type containing tannin compounds which potentially to be used as biomordants in woven fabrics dyeing. This research is the first work to determine the color cha racteristics of Timorese woven fabric after using tannin from Pterocarpus indicus bark as a biomordant. This research aims to determine the tannin content and colour properties of Timor woven fabric after using tannin as a a natural mordant. Pterocarpus indicus bark samples were prepared and extracted via hot extraction. The tannins in Pterocarpus indicus stem bark were qualitatively and quantitatively analyzed using FT-IR and UV-Vis Spectrophotometer respectively, then applied as a color binder for woven threads. The color properties of woven fabrics with tannin were compared to woven fabrics treated with Al2(SO4)3 mordant at a concentration of 15%. Color fastness to washing are tested using the Staining Scale Standard. Pterocarpus indicus bark tannin is a brown powder. Qualitative and quantitative tests show that Pterocarpus indicus bark contains tannins with a total concentration of 0.0436%. FTIR spectra exhibited functional groups absorption by the aromatic C-H, O-H, C=C, C-C, C-O-C, and C-O. The use of 15% tannin and curcumin dye produces a yellow-brown woven fabric with a fairly good color fastness value to washing. Pterocarpus indicus bark contains tannin which has potential as a biomordant for natural Timorese weaving dyeing.

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