Jurnal Beta Kimia https://ejurnal.undana.ac.id/index.php/jbk <p><strong>Jurnal Beta Kimia (JBK)</strong>&nbsp;with&nbsp;<a href="https://issn.lipi.go.id/terbit/detail/20210908050762025"><strong>e-ISSN: 2807-7938 </strong></a><strong><a href="https://issn.lipi.go.id/terbit/detail/20210908050762025">(online)</a>&nbsp;</strong>and&nbsp;<a href="https://issn.lipi.go.id/terbit/detail/20210908181665318"><strong>p-ISSN: 2807-7962 (print)</strong></a>&nbsp;is a journal published by the Chemistry Education Study Program, FKIP, University of Nusa Cendana. This journal is issued with a frequency of 2 (two) times a year, namely in <strong>May</strong> and <strong>November</strong>. This journal focuses on the fields of Chemical Education and Science. The article manuscripts published in this Journal are Original Articles, Short Communications, and review articles which aim to contribute to the discussion of research, experience, development, teaching, and dissemination related to the field of chemistry education and chemical science.</p> en-US <ol> <li class="show">Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a&nbsp;<a title="Creative Commons Atribusi-Non Commercial-Share Alike (CC BY-NC-SA)" href="http://creativecommons.org/licenses/by-nc-sa/4.0/" target="_blank" rel="noopener">Creative Commons Atribusi-Non Commercial-Share Alike (CC BY-NC-SA)</a>.</li> <li class="show">Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.</li> <li class="show">Every publication (printed/electronic) are open access for educational purposes, research, and library. Other than the aims mentioned above, the editorial board is not responsible for copyright violation.</li> </ol> jurnalbetakimia@undana.ac.id (Johnson N. Naat) yantusneolaka@staf.undana.ac.id (Yantus A.B. Neolaka) Wed, 20 Nov 2024 06:41:38 +0000 OJS 3.1.1.2 http://blogs.law.harvard.edu/tech/rss 60 Pengembangan Video Pembelajaran Berbasis Animaker pada Materi Penerapan Kimia dalam Kehidupan Sehari-hari di SMA Fase E https://ejurnal.undana.ac.id/index.php/jbk/article/view/18277 <p><em>Chemistry can sometimes be difficult because the teaching methods are boring, useless, and completely focused on memorization. This research aims to produce interesting animation-based learning materials about the application of chemistry in everyday life and to determine its feasibility and practicality. Animaker-based learning videos are created and packaged using Animaker.com, Microsoft PowerPoint, Canva, Genially, and Google Sites. This research uses Research &amp; Development techniques and the ADDIE model (Analysis, Design, Development, Implementation, And Evaluation). The results of the assessment by material experts and media experts regarding the feasibility of this learning video are in the very feasible category with the average validation results obtained by material experts being 97% and 96% for media experts. Based on the assessment results, the average student response shows that every aspect of interest, material and language received a very good or very practical category, with a percentage score of 90% in the Animaker-based animated video learning media in the material Application of Chemistry in Everyday Life for class X for high school this is very practical to use.</em></p> Irma Sukmawati, Irhamni Irhamni, Solfarina Solfarina ##submission.copyrightStatement## http://creativecommons.org/licenses/by-nc-sa/4.0 https://ejurnal.undana.ac.id/index.php/jbk/article/view/18277 Sat, 09 Nov 2024 00:00:00 +0000 Pengembangan Bahan Ajar Termokimia Berbasis Masalah untuk Siswa Kelas XI SMA https://ejurnal.undana.ac.id/index.php/jbk/article/view/18909 <p>Tujuan dari penelitian ini adalah untuk mengeksplorasi kelayakan penggunaan sumber belajar berbasis masalah untuk termokimia sekolah menengah di kelas XI yang telah divalidasi oleh para ahli dan memenuhi kriteria BSNP. Selain itu, penulis akan mengevaluasi bagaimana siswa menanggapi materi-materi ini. Studi dan pengembangan (R&amp;D) di bawah kerangka ADDIE (<em>Analisis, Desain, Pengembangan, Implementasi, Evaluasi</em>) adalah dasar dari studi pengembangan ini, yang dibatasi pada tahap implementasi. Penelitian menemukan bahwa materi pembelajaran termokimia berbasis masalah untuk siswa kelas XI SMA yang dibuat memenuhi persyaratan BSNP. Kelayakan isi rata-rata 3,66, kelayakan penyajian 3,48, kelayakan bahasa 3,44, dan kelayakan kegrafikan 3,51, yang semuanya menunjukkan hal ini. Bahan ajar kimia yang dikembangkan dengan model ADDIE telah berbasis masalah. Hal ini dapat dilihat dari perolehan skor bahan ajar berbasis masalah sebesar 3,85. Siswa memberikan skor rata-rata 3,68 untuk aspek tampilan, 3,57 untuk aspek materi, dan 3,72 untuk aspek manfaat dalam tanggapan respon siswa.</p> Feri Bidiana Oktaria, Jamalum Purba ##submission.copyrightStatement## http://creativecommons.org/licenses/by-nc-sa/4.0 https://ejurnal.undana.ac.id/index.php/jbk/article/view/18909 Sun, 17 Nov 2024 04:40:15 +0000 Efektivitas Perendaman Larutan Nanas Queen Victoria sebagai Pereduksi Logam Fe pada Kerang Hijau (Perna viridis) https://ejurnal.undana.ac.id/index.php/jbk/article/view/18673 <p><em>Excessive Fe heavy metal contamination cause health problems for humans. One of the marine biota that is susceptible to heavy metal contamination is green mussels. Green mussels (Perna viridis) are a food that is very often consumed by humans. This Fe metal which derived with materials that are chelating agents such as citric acid, one of the fruits that contain citric acid is the Queen Victoria pineapple. The research aims to determine the effectiveness of soaking Queen Victoria pineapple solution in reduces Fe metal in green mussels. The pineapple solution immersion test was carried out with varying concentrations of 25, 50 and 75% with soaking times of 15, 30 and 45 minutes which were analyzed using inductively coupled plasma (ICP). The highest reduction results were at a concentration of 25% with a soaking time of 30 minutes, amounting to 60.58%.</em></p> Holisha Widiyanto, Julianti Julianti, Sriwijayanti Sriwijayanti, Puspita Sari, Boima Situmeang, Dian Susvira ##submission.copyrightStatement## http://creativecommons.org/licenses/by-nc-sa/4.0 https://ejurnal.undana.ac.id/index.php/jbk/article/view/18673 Wed, 20 Nov 2024 01:53:43 +0000 Konsistensi dan Dependabilitas Penilaian Microteaching pada Program Studi Pendidikan Kimia : Teori Generalisabilitas https://ejurnal.undana.ac.id/index.php/jbk/article/view/19515 <p>Subjektivitas dan kurang konsistennya penilai/rater dalam proses penyekoran merupakan kritik yang umum ditujukan pada penilaian dalam pembelajaran. Oleh karena itu, artikel ini menyajikan hasil reliabilitas penilaian pada matakuliah Microteaching menggunakan tori generalisabilitas dengan desain px (i:r). Data yang dikumpulkan merupakan nilai ujian mahasiswa baik ujian pada nilai pengamatan di kelas, ujian tengah semester, ujian akhir semester. Responden berjumlah 30 orang, dengan 5 jenis tes dan dinilai oleh 3 rater yang berbeda. Analisis data pada&nbsp; pada artikel ini menggunakan program R untuk menghitung relative error varians;&nbsp; mendapatkan koefisien generalizabilitas dan <em>coefficient dependability</em> dari hasil tes secara empirik. Hasil penelitian didapatkan&nbsp; nilai eror terbesar terdapat pada person dan rater 1 dengan nilai 28.6 % dan 18%, nilai koefisien generalizabilitas sebesar 0.93 dan nilai koefisien <em>dependability</em> sebesar 0.69. Sehingga berdasarkan teori D maka dilakukan modifikasi dengan menambahkan jumlah rater agar nilai koefisien <em>dependability</em> menjadi &gt; 0.7.</p> Dewi Lestarani, Raden Rosnawati, Antonius Umbu Anarato, Arvinda Ceniorita Lalang, Heru Christianto, Maria Ulfah ##submission.copyrightStatement## http://creativecommons.org/licenses/by-nc-sa/4.0 https://ejurnal.undana.ac.id/index.php/jbk/article/view/19515 Wed, 20 Nov 2024 06:32:30 +0000 Efektivitas Penerapan Model Pembelajaran Berbasis Masalah (PBL) Materi Asam Basa Untuk Meningkatkan Hasil Belajar Peserta Didik Kelas XI IPA 5 https://ejurnal.undana.ac.id/index.php/jbk/article/view/18979 <p>Tujuan penelitian ini adalah untuk mengetahui kemampuan guru dalam mengelola pembelajaran, ketuntasan hasil belajar dan peningkatan hasil belajar aspek pengetahuan dalam pembelajaran yang menerapkan model pembelajaran berbasis masalah materi asam basa peserta didik kelas XI IPA 5 SMA Negeri 2 Kupang. Jenis penelitian ini adalah deskriptif kuantitatif. Sampel dalam penelitian ini adalah peserta didik kelas XI IPA 5 SMA Negeri 2 Kupang yang berjumlah 25 orang. Teknik pengumpulan data yang digunakan berupa observasi dan tes. Hasil penelitian menunjukkan bahwa 1) kemampuan guru dalam mengelola pembelajaran dikategorikan baik dengan skor rata-rata 3,78 dan reliabilitasnya 98%, 2) ketuntasan hasil peserta didik dinyatakan tuntas dengan rata-rata nilai akhir 88,8, dan 3) peningkatan hasil belajar aspek pengetahuan peserta didik tergolong dalam kriteria sedang dengan skor rata-rata N-Gain 0,60. Berdasarkan hasil penelitian dan analisis menunjukkan bahwa dengan menggunakan model pembelajaran berbasis masalah efektif meningkatkan hasil belajar peserta didik kelas XI IPA 5 SMA Negeri 2 Kupang.</p> Maria Sisilia Marselina, Aloysius M. Kopon, Yanti R. Tinenti ##submission.copyrightStatement## http://creativecommons.org/licenses/by-nc-sa/4.0 https://ejurnal.undana.ac.id/index.php/jbk/article/view/18979 Mon, 02 Dec 2024 12:34:24 +0000 Model Isotherm Adsorpsi Triptamin menggunakan Adsorben Silika termodifikasi BSA https://ejurnal.undana.ac.id/index.php/jbk/article/view/19684 <p><em>This article reports the adsorption isotherm model of tryptamine using bovine serum albumin-modified silica adsorbent (SiO</em><em>₂</em><em>@BSA) obtained from Takari natural sand as a silica source. Silica was extracted from natural sand and then modified with BSA. The SiO</em><em>₂</em><em>@BSA adsorbent was used to adsorb tryptamine in a batch system with 5, 10, 20, 30, 40, and 50 mg/L concentrations. Tryptamine content was analyzed using a UV-Vis spectrophotometer at 423 nm. Eight models were employed to describe the adsorption isotherm of tryptamine. The modeling results revealed that tryptamine adsorption follows the Langmuir isotherm model, with an R² value of 0.938 and a maximum adsorption capacity of 7.961 mg/g. This study confirms the potential of SiO</em><em>₂</em><em>@BSA as an effective adsorbent for tryptamine adsorption, contributing to the development of adsorption technology for organic compounds.</em></p> Rosalia Febriana Deram, Antonius Umbu Anarato, Dewi Lestarani, Yantus A.B. Neolaka, Yosep Lawa, Eka B.S. Kalla, Anselmus B. Baunsele, Fidelis Nitti, Johnson N. Naat ##submission.copyrightStatement## http://creativecommons.org/licenses/by-nc-sa/4.0 https://ejurnal.undana.ac.id/index.php/jbk/article/view/19684 Mon, 09 Dec 2024 00:00:00 +0000