This study aims to analyze the conception, threshold concept, and troublesome knowledge in redox reactions. This research used a descriptive qualitative method which included analyzing several journal articles about conception and conducting interviews with five chemistry teachers to get information about threshold concepts and troublesome knowledge. Based on a journal analysis related to the conception for redox reactions, the majority of students correctly answered questions about the concept of defining oxidation numbers based on the binding and releasing of oxygen, determining reducing and oxidizing agents. Conversely, most students experienced misconceptions on the concepts of oxidation and electron transfer, such as in assuming the charge on polyatomic molecules and ions is an oxidation number, changes in ion charge and polyatomic molecules to identify the oxidation and reduction reaction species. Meanwhile, the threshold concept for redox reactions comprised of the symbol of elements, chemical formulas, nomenclature, chemical materials, the constituent particles, and electronegativity. Whereas troublesome knowledge for redox reactions included complexity in determining oxidation numbers, complexity in using definitions, and language use.
Telah dilakukan penelitian yang menghasilkan representasi kimia berbasis intertekstual berupa multimedia pada sub-konsep konfigurasi elektron berdasarkan model atom Bohr yang diperluas. Dalam penelitian ini digunakan metode deskriptif dan evaluatif yang merupakan bagian dari Penelitian dan Pengembangan (R & D). Prosedur penelitian dilakukan melalui beberapa tahapan kerja, yaitu: (1) penentuan materi subjek, (2) kajian standar kompetensi dan kompetensi dasar yang terdapat pada standar isi serta contoh silabus BSNP untuk menentukan indikator dan konsep, (3) pengumpulan multimedia existing, (4) analisis multimedia existing berdasarkan kajian aspek konten, pedagogi, dan multimedia, (5) pembuatan script dan storyboard yang divalidasi berdasarkan aspek konten dan pedagogi, (6) revisi script dan storyboard, (7) pembuatan multimedia yang kemudian di validasi pada aspek multimedia. Multimedia ini kemudian ditanggapi oleh guru dan siswa untuk mengetahui kualitas multimedia berdasarkan kriteria/ indikator yang telah ditentukan melalui angket. Hasilnya diolah secara deskriptif persentase. Angket diberikan kepada lima orang guru mata pelajaran Kimia dan 30 orang siswa SMA kelas XI dan XII yang telah mempelajari mengenai sub-konsep konfigurasi elektron berdasarkan model atom Bohr yang diperluas. Berdasarkan data angket guru diperoleh hasil bahwa tingkat persetujuan terhadap: (1) kualitas multimedia adalah 84%, (2) kejelasan penyampaian materi/ konsep adalah 96%, (3) peran multimedia adalah 100%, dan (4) pengembangan multimedia adalah 100%. Secara keseluruhan respon guru terhadap multimedia terletak pada daerah positif. Berdasarkan data angket siswa diperoleh hasil bahwa tingkat persetujuan terhadap: (1) motivasi pada multimedia adalah 85.31%, (2) konten pada multimedia adalah 84.7%, (3) navigasi pada multimedia adalah 86%, (4) multimedia dan interaktivitasnya adalah 90.84%, dan (5) tampilan multimedia adalah 86.77%. Secara keseluruhan respon siswa terhadap multimedia terletak pada daerah setuju. Dengan demikian representasi kimia sekolah berbasis intertekstual pada sub-konsep konfigurasi elektron model atom Bohr yang diperluas dalam bentuk multimedia yang telah dikembangkan dapat digunakan.Kata kunci: intertekstual, konfigurasi elektron, model atom Bohr, multimedia, representasi kimia
Abstract:The aim of this study was to develop intertextual learning strategy with guided inquiry on solubility equilibrium concept to enhance student's scientific processing skills. This study was conducted with consideration of some various studies which found that lack of student's process skills in learning chemistry was caused by learning chemistry is just a concept. The method used in this study is a Research and Development to generate the intertextual learning strategy with guided inquiry. The instruments used in the form of sheets validation are used to determine the congruence of learning activities by step guided inquiry learning and scientific processing skills with aspects of learning activities. Validation results obtained that the learning activities conducted in line with aspects of indicators of the scientific processing skills.
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