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All Journal VALENSI Jurnal Akuntabilitas Manajemen Pendidikan Alotrop Jurnal Pendidikan dan Ilmu Kimia Chemistry Education Practice Jurnal Akademika Kimia
Wiwit, Wiwit
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Chemistry Education

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PENGEMBANGAN PENUNTUN PRAKTIKUM BERBASIS LINGKUNGAN PADA MATERI REAKSI EKSOTERM DAN ENDOTERM UNTUK KELAS XI MIPA SMAN 8 BENGKULU UTARA Apriliana, Laila Dwi; I Nyoman Candra; Wiwit, Wiwit
ALOTROP Vol. 8 No. 1 (2024): Penelitian Kimia dan Pembelajaran Kimia
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v8i1.34456

Abstract

[The development of environmental based-labwork instruction book on the topic of exotherm and endotherm reaction for student of Class XI of Science, SMAN 8 Bengkulu Utara]The type of this research is a Research and Development study developing an environmental based - labwork instruction book on exothermic and endothermic reaction topic with the aim of knowing the feasibility and response of students to the labwork instruction book and to determine the psychomotor (skills) score ​​of students using it. This research uses the ADDIE development model (Analysis, Design, Development and Evaluation). This research was conducted at SMAN 8 Bengkulu Utara with research subjects namely 9 students in class XI MIPA 3 for small-scale trials and 28 students in class XI MIPA 1 for large-scale trials. Based on the research results, it is found that (1) The developed environment-based labwork instruction book was suitable to be applied with the percentage of material and media validity respectively were 92.5% and 93.3% with very valid criteria (2) Student responses to the labwork instruction guidebook fell in the very good criteria from the aspects of content quality, language and usefulness with an average percentage was 92.2% on a small scale and 92.7% on a large scale. (3) The psychomotor assessment of students using the labwork instruction book fell in a good criteria, 71.0% for the assessment aspect of the preparation stage; 74.8% for assessment of the implementation stage and 84.7% for assessment of the final stage, with an average percentage of 76.8%.
Analysis of Learning Outcome Achievements and Support of Lecturer Competencies towards International Accreditation Nursaadah, Euis; Maisarah, Ira; Wiwit, Wiwit; Syafriadin, Syafryadin; Chandra, I Nyoman
Jurnal Akuntabilitas Manajemen Pendidikan Vol. 12 No. 1 (2024): April
Publisher : Faculty of Educational Sciences, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jamp.v12i1.65539

Abstract

Learning Outcome (LO) is a formulation of learning outcomes expected to be met by students. LO is structured to equip the competencies that graduates want to achieve. Each course in a program carries LO content that students must achieve. Through the Semester Learning Plan (RPS) prepared by expert lecturers, it will be seen how the LO is provided through the learning process and how to measure it. This study aims to analyze the achievement of LO in 8 (eight) Study Programs at the University of Bengkulu's FKIP which are being proposed for international accreditation. This LO achievement analysis is also linked to the competence of lecturers. The LO used by the 8 Study Programs to meet the requirements of the IQF is in line with international frameworks, one of which is the Europian Qualification Framework (EQF). Therefore, the results of this study support the quality assurance of a program or institution in achieving one of the components of international accreditation. The results of this study found that the scientific fields of the lecturers in each study program were in accordance with the qualifications (qualified) and could be accounted for which was strengthened by the fact that almost all lecturers had the status of certified lecturers. This is supported by the number of reputable national and international publications, scientific works that are registered with copyrights, works in the form of books or book chapters that are registered with ISBNs and others. In addition, learning outcomes have been measured in each program and show readiness towards international accreditation.
Study of Ethanol Extract of Karamunting (Rhodomyrtus tomentosa (Aiton) Hassk) as Acid-Base Bioindicator wiwit, Wiwit; W. M Diah, Anang
Jurnal Akademika Kimia Vol. 12 No. 3 (2023)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2023.v12.i3.pp154-159

Abstract

Karamunting or Rhodomyrtus tomentosa (Aiton) Hassk is a fruit that contains anthocyanins. This study aimed to determine the potential of the ethanol extract of this fruit as an acid-base bioindicator. Karamuting fruit was macerated using three solvents (n-hexane, ethyl acetate, and ethanol) for 24 hours. The extract of the karamunting fruit was tested as indicators in acid-base solutions and buffer solutions and compared with phenolphthalein and methyl orange for acid-base titrations, namely: Strong acids with strong bases, weak acids with strong bases and weak bases with strong acids. The results showed that the ethanol extract of karamunting fruit was brown, in strong acids was red, in strong bases was dark green, in weak acids was pink, and in weak bases was light green. Furthermore, the kara munting fruit indicator extract buffer solution gave four groups of colour changes, namely, at pH 1, it was red; at pH 2 to 6, it was pink; at pH 7 to pH 10, it was light green; and at pH 11 to 12, it was dark green. The ethanol extract of karamunting fruit can be used as an acid-base indicator because it gives equivalent results to comparative indicators, namely phenolphthalein and methyl orange.
Pengembangan Komponen Instrumen Terpadu (KIT) Praktikum Pada Materi Larutan Penyangga Filandari, Mia; Wiwit, Wiwit; Rohiat, Salastri; Krisandini, Triana
Chemistry Education Practice Vol. 8 No. 1 (2025): Edisi Mei
Publisher : FKIP University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/cep.v8i1.8065

Abstract

This research is developing an integrated instrument component (KIT) practicum on buffer solution material. The study aimed to determine the feasibility level of the KIT developed and the students' response to the KIT.  The development model is carried out by using the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation). The research was conducted in May 2022 at SMA Negeri 5 Kota Mukomuko. The trial class selection was conducted through purposive sampling of all XI MIPA classes, with 12 students from the XI MIPA 2 class participating in small-scale trials and 30 students from the XI MIPA 1 class in large-scale trials. Data collection methods were carried out using written tests and student response questionnaires. The data obtained were analyzed using validation tests, response questionnaire analysis, and an examination of student learning outcomes. The results obtained (1) KIT practicum is very feasible to be used as a practicum media by students based on the results of validation tests on media and material aspects, (2) The response of students to the trial of the KIT practicum of buffer solution is included in the very interesting category shown in the acquisition of an average value of 86.6%.
Assessment of Macronutrient Dynamics in a Tropical Watershed: A Study from Bengkulu River and Estuary Indonesia Wiwit, Wiwit; Ikhsani, Idha Yulia; Nurhamidah, Nurhamidah; Oktiarni, Dwita; Wong, Kuo Hong
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 11, No. 1, May 2025
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v11i1.42477

Abstract

This study assesses the sources, transport, and distribution of macronutrients, including nitrate, nitrite, silicate, and phosphate, starting from the upper stream of the Bengkulu River, which is the biggest river in Bengkulu Province, to the coastal seawater of the eastern tropical Indian Ocean. The sampling was conducted using an acid-washed polypropylene beaker and placed in acid-cleaned 5 L polyethylene containers during the dry season in July 2024. The water samples were collected from the surface waters of 15 stations. The macronutrients in the water samples were determined using a spectrophotometer UV-Vis following the Strickland and Parsons method. Macronutrient analysis was conducted in LATERIO BRIN, Jakarta, Indonesia. The concentration of analysed macronutrients ranged from 0.005 - 0.058 mgN-NO3/L for nitrate, <0.001 - 0.014 mgN-NO2/L for nitrite, 0.163 - 9.314 mgSi-Si(OH)4/L for silicate, and 0.01 - 0.085 mgP-PO4-/L for phosphate. Several stations, including Stations 6, 10, and 14, exhibited relatively elevated nitrate concentrations, which were further supported by similarly high phosphate levels. Stations 6, 10, and 14, situated near areas of intense anthropogenic activity in Bengkulu City, suggest that human-induced inputs have enriched the water environment with macronutrients. The highest silicate concentration was observed at Station 1, located upstream in the Bengkulu River. This aligns with previous findings and underscores the role of weathering processes in controlling silicate distribution. Compared to the macronutrient concentration guidelines for river water set by Indonesian Government Regulation 2021 No. 22, the nitrite concentrations at certain river stations exceeded the safety threshold for aquatic biota. In contrast, nitrate and phosphate levels remained within the safe range.
Co-Authors Apriliana, Laila Dwi Chandra, I Nyoman Dwita Oktiarni Filandari, Mia I Nyoman Candra Idha Yulia Ikhsani, Idha Yulia Ira Maisarah Krisandini, Triana Nurhamidah Nurhamidah Nursaadah, Euis Salastri Rohiat, Salastri Syafriadin, Syafryadin W. M Diah, Anang Wong, Kuo Hong