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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 16 Documents
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Search results for , issue "Vol. 12 No. 2 (2024): April-May 2024" : 16 Documents clear
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.
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.  
Characterization of Barium Hexaferrite and Iron Sand as Microwave Absorbing Materials Naibaho, Yeni P.S; Humaidi, Syahrul; Rianna, Martha; Diana, Linda
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.v12i2.11776

Abstract

This research aims to analyze the characteristics of Barium Hexaferite and iron sand as microwave absorbing materials, their influence on microwave absorption properties, and the frequency range of waves produced by these materials. The research method used is the Co-Precipitation method. Dissolve barium hexapherite and iron sand in distilled water with the appropriate mass ratio. The results of this study show that the synthesis of iron sand and barium hexapherite material produces a single phase material. The single phase material is shown through X-ray diffraction pattern data, namely iron sand and barium hexapherite, namely hematite and barium hexapherite. Iron sand and barium hexapherite materials are characterized using EDS which shows a composition that is close to stoichiometry. Observations using VNA show that iron sand and barium hexapherite materials are able to absorb electromagnetic waves at a radar wave frequency of 11.1 GHz, which is -25.64 dB.
The Effect of Problem-Based Learning Model on Students’ Learning Outcomes Viewed from Learning Styles Arni, Kurnia Julianti; Kosim, Kosim; Verawati, Ni Nyoman Sri Putu
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.v12i2.11788

Abstract

This study explores the effectiveness of the Problem-Based Learning (PBL) model on students' learning outcomes, focusing on how different learning styles—visual, auditory, and kinesthetic—affect its efficacy. Conducted at SMA Negeri 1 Narmada, the research employed a quasi-experimental design with a pretest-posttest nonequivalent control group setup to measure the impacts of PBL versus traditional teaching methods. Findings from the study revealed significant improvements in the physics learning outcomes for the experimental group, which engaged with the PBL model, compared to the control group that used conventional direct instruction methods. Statistical analysis using a two-way ANOVA showed a significant enhancement in learning outcomes associated with the PBL model (p = 0.030), but no significant interaction between learning styles and the learning model was found, indicating that the PBL model benefits all learning styles equally without preference. These results suggest that while PBL universally improves learning outcomes, individual learning styles do not significantly alter its effectiveness. The study highlights the potential of PBL to not only increase academic performance in physics but also to foster a more engaging and participatory learning environment. It underscores the importance of adopting educational models that accommodate diverse learning preferences and provide dynamic, student-centered learning experiences. This research contributes to the understanding of instructional effectiveness and supports the broader implementation of PBL in physics education to cater to varied educational needs and learning styles.

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