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EduChemia (Jurnal Kimia dan Pendidikan)

EduChemia
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Published by Universitas Sultan Ageng Tirtayasa

ISSN : 25024778 EISSN : 25024787 DOI : http://dx.doi.org/10.30870/educhemia.v6i2.10412

Core Subject : Science, Education, Engineering,

Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology

Focus and Scope Educhemia (Jurnal Kimia dan Pendidikan) is Periodicals published the results of research related to the development of science and technology in the field of Chemistry and Chemistry education as a form of intellectual property Chemistry: Organic chemistry, Inorganic chemistry, Biochemistry, Physical chemistry, Analytical Chemistry, Environmental Chemistry, Material chemistry, Ethnochemistry. Chemistry education: chemistry learning design and model, chemical education curricula, Technology innovation and media/multimedia in chemistry learning, development of evaluation tools, lesson study and classroom action research

Arjuna Subject : Kimia(semua kategori) - Kimia Organik

Articles 126 Documents

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Perbandingan Optimasi Biosensor Antioksidan Menggunakan Ekstrak dan Enzim Murni Superoksida Dismutase Imas Eva Wijayanti
EduChemia (Jurnal Kimia dan Pendidikan) Vol 1, No 1 (2016): Available Online in January 2016
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Abstract: An antioxidant biosensor has been developed for measurement of antioxidant capacity. The purpose of this study was to determine and compare the activity of the superoxide dismutase (SOD) enzyme from the crude extract of Deinococcus radiodurans cells and pure SOD from bovine erythrocytes which were immobilized on zeolite nanoparticles (ZNP). The kinetics parameters were also determined. The optimum condition was obtained by Response Surface Method. The immobilized crude extract D. radiodurans SOD (CES) modified carbon paste electrode (CPE) (CES-ZNP-CPE) have different optimum conditions with the modified carbon paste electrode pure SOD immobilization (PS-ZNP-CPE). This is shown by the difference in the two structures. Erythrocyte SOD enzyme from cows that have the type of Cu / Zn-SOD, whereas SOD extracted from the bacterium D. radiodurans is the type of Mn-SOD. The differences in the structure cause the Cu / Zn SOD and Mn-SOD has a different reaction mechanism, so that responses and measurement will be differences resulted.Keywords: Antioxidant biosensor, Immobilization, Superoxide dismutase, Zeolite nanoparticlesAbstrak: Biosensor antioksidan telah dikembangkan untuk pengukuran kapasitas antioksidan. Tujuan dari penelitian ini adalah untuk menentukan dan membandingkan aktivitas enzim superoksida dismutase (SOD) dari ekstrak kasar sel bakteri Deinococcus radiodurans dan SOD murni dari eritrosit sapi yang diimobilisasi pada nanopartikel zeolit (ZNP). Kondisi optimum diperoleh dengan metode respon permukaan. Elektrode pasta karbon yang dimodifikasi ekstrak kasar SOD D. radiodurans imobilisasi (CES-ZNP-CPE) memiliki kondisi optimum yang berbeda dengan elektrode pasta karbon yang dimodifikasi SOD murni imobilisasi (PS-ZNP-CPE). Hal ini disebabkan karena perbedaan struktur keduanya. Enzim SOD dari eritrosit sapi yang memiliki tipe Cu/Zn-SOD, sedangkan SOD yang diekstrak dari bakteri D. radiodurans adalah tipe Mn-SOD. Perbedaan struktur menyebabkan Cu/Zn SOD dan Mn-SOD memiliki reaksi mekanisme yang berbeda, sehingga respon dan pengukuran arus yang dihasilkan akan berbeda pula.Kata kunci: Biosensor antioksidan, Imobilisasi, Nanopartikel zeolit, Superoksida dismutase

Development of Students Worksheet Chemical Bond Based On Learning Cycle 7E Utari Oktavianti; Asmadi M. Noer; Lenny Anwar S
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 1 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

This development research aims to produce worksheet chemical bonds based on Learning Cycle 7E, to know the validity level of the worksheet according to the validators, to know the practicality level of the worksheet according to the teacher, and to know the attractiveness level of the worksheet according to students. The development model follows the plomp model. Plomp consists of the preliminary investigation phase, the design phase, realization or construction phase, the test phase, evaluation and revision, and the implementation phase. Based on the results of product validation by three validators, the results obtained with the category valid from five aspects, namely the feasibility of the content, Learning Cycle 7E characteristics, language, presentation, and graphics with the percentage of 91.67%, 92.71%, 94.44%, 91.66%, and 88.89%. Teachers 'response as worksheet users based on the Learning Cycle 7E category is very practical with a percentage of 88.15%, and students' responses to worksheet based on the Learning Cycle 7E category are very interesting with a percentage of 89.99%.

Peningkatan Motivasi Belajar Kimia Siswa Sekolah Menengah Menggunakan Metode Koligatif Kemas Kreatif (K3) Suci Rizki Nurul Aeni
EduChemia (Jurnal Kimia dan Pendidikan) Vol 1, No 1 (2016): Available Online in January 2016
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Abstract: This research is classroom action research at XII class of Madrasah Aliyah YAPIKA. The subject matter properties of Colligative Solution conducted with K3 method (Koligatif Kemas Kreatif) to improve student’s learning motivation. Research has been conducted with the repetition of three times so that the study be completed for three years. Three phase of learning are preparation, implementation and evaluation. Preparation phase is done by teachers and students at home. The teacher is preparing the learning media there are games rules, cardboard spacecraft, question cards, stopwatch, and a dice. Students learn the material properties of koligatif independently learning by themself using the student hand book. Implementation of the learning is done through a number of methods, there are the story method, discussions and cooperative teamwork through creative games. The evaluation was direct observation methods. The observation sheets assessing of cognitive and affective aspects of students. Based on the results of observation showed that students can impact the content, focus attention and participate active in learning, supported by innovations that have been implemented.Keywords: Colligative properties, K3, MotivationAbstrak: Penelitian ini adalah penelitian tindakan kelas di Madrasah Aliyah YAPIKA Kurnia kelas XII yang mengkaji materi Sifat Koligatif Larutan melalui metode pembelajaran K3 (Koligatif Kemas Kreatif), sebagai cara untuk meningkatkan motivasi belajar siswa. Penelitian telah dilakukan dengan pengulangan sebanyak tiga kali. Pembelajaran yang ditempuh berupa tahap persiapan, pelaksanaan dan evaluasi. Tahap persiapan dilakukan oleh guru dan siswa di rumah. Guru mempersiapkan media pembelajaran berupa petunjuk games, karton wahana, question card, stopwatch, dan dadu. Siswa mempelajari materi sifat koligatif secara mandiri dengan cara belajar melalui buku pegangan siswa. Pelaksanaan pembelajaran dilakukan melalui sejumlah metode yaitu metode kisah, diskusi dan games kreatif melalui kerjasama tim secara kooperatif. Evaluasi dilakukan melalui metode observasi langsung. Lembar observasi tersebut menilai aspek kognitif dan aspek afektif siswa. Berdasarkan hasil observasi menunjukan bahwa pada umumnya siswa dapat menguasai konten, memusatkan perhatian dan berpartisipasi aktif pada pembelajaran ditunjang oleh inovasi yang telah dilaksanakan.Kata Kunci: Sifat koligatif, K3, Motivasi

Back Matter Vol 5 No 1 (Author Guidelines, Acknowledgment) EduChemia EduChemia
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 1 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Analisis Kemampuan Awal Multi Level Representasi Mahasiswa Tingkat I pada Konsep Reaksi Redoks Indah Langitasari
EduChemia (Jurnal Kimia dan Pendidikan) Vol 1, No 1 (2016): Available Online in January 2016
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Abstract: Analysis of students’ initial ability before teaching the chemistry concept are very important to determine the correct techniques in learning concept. The objectives of this study was to identify the first year students’ initial ability to describe and explain redox reactions concept using macroscopic, submicroscopic and symbolic representation. This study applies pre-experimental research design involving a group of subjects. The diagnostic instrument consists of 15 items two-tier multiple choice and 2 items essay. Data were analyzed descriptively by tabulating students’ answers of each question. The results showed that the first year students’ initial understanding to the redox reactions concept was very low. Students have not been able to describe and explain the observed redox reactions (macroscopic) in terms of the atoms, molecules and ions that were involved in the reactions. This results also indicated the first year students’ symbolic and microscopic understanding very limited and only 2.9 % of students were able to make the connection between macroscopic observations, symbolic and submicroscopic representation .Keywords: Initial ability, Redox reaction, Multiple levels of representationAbstrak: Analisis tingkat pemahaman awal mahasiswa sebelum mengajarkan konsep kimia sangat penting agar dapat menentukan teknik yang tepat dalam pembelajaran konsep. Penelitian ini bertujuan untuk menguji kemampuan awal mahasiswa tingkat I dalam mendeskripsikan dan menjelaskan konsep reaksi redoks menggunakan representasi makroskopik, submikroskopik dan simbolik. Penelitian ini menggunakan desain penelitian pra-eksperimental dengan melibatkan satu kelompok subjek. Instrumen tes terdiri dari 15 soal two tier dan 2 soal essay. Data hasil penelitian dianalisis secara deskriptif dengan mentabulasikan jawaban mahasiswa untuk masing-masing item soal. Hasil penelitian menunjukkan bahwa pemahaman awal mahasiswa tingkat I terhadap konsep reaksi redoks masih tergolong sangat rendah. Mahasiswa belum mampu mendeskripsikan dan menjelaskan hasil pengamatan reaksi redoks (makroskopik) dalam bentuk atom, molekul, dan ion yang terlibat dalam reaksi. Hal ini mengindikasikan bahwa pemahaman simbolik dan submikroskopik mahasiswa tingkat I masih sangat terbatas dan hanya 2,9% mahasiswa yang mampu membuat hubungan antara pengamatan makroskopik, representasi simbolik dan gambaran submikroskopik.Kata kunci: Kemampuan awal, Reaksi redoks, Multi level representasi

Isolation and Characterization of Pectin from Waste of “Raja Nangka” Banana Peels (Musa acuminata (AAA cv)) Mardiana Prasetyani Putri; Prima Agusti Lukis; Leny Putri Mawarni
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 1 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Raja nangka banana peel contains pectin (10-21%), lignin (6-12%), and galacturonic acid. Pectin is a D-galacturonic acid polymer which connected with the β-1,4-glycosidic bond. Pectin was benefitted a gel form material and thickener making jam and low-calorie food. Pectin was generated with an isolation process. The purpose of this research was isolated and characterized pectin from raja nangka banana peel waste, and then pectin was obtained characterized for know pectin quality. Pectin isolation was done with the reflux extraction method. Pectin extraction uses chloric acid 1 N solvents. Pectin isolation was done at pH 1,5 temperature 90°C for 80 minutes. The purpose of testing for the function group was known as groups in pectin isolation. The functional group in pectin was got and then characterized with FTIR to show group vibration OH, CH3, C=O, C-H-, and R-O-R, with a wavelength respectively 3.448,366; 2.930,022; 1649,310; 1385,247 and 1146,453. Other than, pectin physical nature was done such as water content (0,061%), ash content (1,994%), equivalent weight (748,29%), methoxyl content (6,90%), galacturonic acid (250,88%) and esterification degree (0,0156%). Pectin characterization was got correct with pectin quality standard based on IPPA (International Pectin Producers Association).

Motivasi Belajar Siswa pada Materi Ikatan Kimia Melalui Metode Praktikum Sella Marselyana Abadi; Evi Sapinatul Bahriah
EduChemia (Jurnal Kimia dan Pendidikan) Vol 1, No 1 (2016): Available Online in January 2016
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Abstract: This study aims to determine student’s motivation in chemical bonding material throught practical methods. The method used descriptive method. The research instrument used a questionnaire motivation to learn. The sample was students grade X.5 SMA Muhammadiyah 25 Pamulang consist of 11 male and 16 female students. Data obtained in the form of percentage of the average value of each indicator of motivation. Implementasi result of learning using the practical method showed that the students’ motivation in chemical bonding material through practical methods including the high criteria. It can be seen from the average percentage of each indicator learning motivation which includes interest in learning is 84.97% (high), persistence in learning is 83.82% (high), participant in learning is 89.80% (high), the effort to learn is 85.79% (high), and great attention to learning is 77.31% (high).Keywords: Motivation, Practical Methods, Chemical BondingAbstrak: Penelitian ini bertujuan untuk mengetahui motivasi belajar siswa pada materi ikatan kimia melalui metode praktikum. Metode penelitian yang digunakan adalah metode deskriptif. Instrumen penelitian yang digunakan adalah angket motivasi belajar. Sampel penelitian ini adalah siswa/i kelas X.5 SMA Muhammadiyah 25 Pamulang dengan jumlah 27 orang siswa/i yang terdiri atas 11 siswa dan 16 siswi. Data yang diperoleh berupa persentase nilai rata-rata tiap indikator motivasi. Hasil imlementasi pembelajaran dengan menggunakan metode praktikum menunjukkan bahwa motivasi belajar siswa pada materi ikatan kimia melalui metode praktikum termasuk dalam kriteria tinggi. Hal ini dapat terlihat dari persentase rata-rata tiap indikator motivasi belajar yang meliputi minat belajar dengan persentase 84,97% (tinggi), ketekunan dalam belajar dengan persentase 83,82% (tinggi), partisipasi dalam belajar dengan persentase 89,80% (tinggi), usaha untuk belajar dengan persentase 85,79% (tinggi), dan besar perhatian dalam belajar dengan persentase 77,31% (tinggi).Kata Kunci: Motivasi Belajar, Metode Praktikum, Ikatan Kimia

Designing Learning Sequence Metalic Bonding Concept Through Model of Educational Reconstruction Framework Euis Nursa'adah; Liliasari Liliasari; Ahmad Mudzakir
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 2 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

The problem in this research is that students are more familiar with the application of metallic bonding than its concept. This is because the characteristics of the concept are abstract concepts with real context. It makes students more interested in studying the phenomenon but lack to explain the concept and some students show misconception. Therefore this research aims to design learning sequences of metallic bonding topics using the framework model of educational reconstruction (MER). This sequence considers the students’ and scientists’ conception. Considering the initial conception of students in designing learning sequences provides benefits for students. Through MER, learning sequences begin by analyzing student conceptions through semi-structured interviews and concept maps designed by students. Scientific conception analysis is done through concept analysis of several text books that are often used in learning. There are three criteria of students’ conception they are prefer to scientist conception, misconception, and incompetence. Based on the three criteria, learning sequences are produced with the aim to bringing students' conceptions toward scientific conceptions.

Analisis Kemampuan Kognitif Mahasiswa pada Konsep Asam-Basa Menggunakan Tes Berdasarkan Taksonomi Bloom Revisi Euis Nursa'adah; Devi Kurniawati; Yunita Yunita
EduChemia (Jurnal Kimia dan Pendidikan) Vol 1, No 1 (2016): Available Online in January 2016
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Abstract: Concept of acid-base is one concept that has characteristics abstract concept with concrete example. To understanding of these concepts requires knowledge of factual, conceptual, procedural, and Meta-cognitive dimension and also cognitive processes with applying, analyzing, evaluating and creating. Through a descriptive study to analyze the cognitive ability of students to determine how student can solve chemical problems used test based on Bloom's taxonomy revision. This study aims to analyze the cognitive abilities of students on the dimensions of knowledge and processes about acid-base concept. Subjects were 39 students of chemistry education UIN Sunan Gunung Djati Bandung. Based on the results show that students abilities of conceptual knowledge reaches the highest percentage of 80% conceptual, 63% procedural, and Meta-cognitive 70%. While the cognitive processes 85% applying, 79% analyzing, 77% evaluating, and 34% creating.Keywords: Cognitive skill, Acid-Base, Bloom's Taxonomy RevisionAbstrak: Konsep asam basa merupakan salah satu konsep kimia yang memiliki karakteristik abstrak contoh konkret. Pemahaman konsep tersebut membutuhkan pengetahuan faktual, konseptual, prosedural dan metakognitif dengan dimensi proses kognitif mengaplikasikan, menganalisis, mengevaluasi dan mencipta. Melalui penelitian deskriptif dilakukan analisis kemampuan kognitif mahasiswa untuk mendeskripsikan kemampuan mahasiswa dalam memecahkan masalah kimia berdasarkan konsep dasar yang dimilikinya dengan menggunakan perangkat tes berdasarkan taksonomi Bloom revisi pada konsep asam-basa. Penelitian ini melibatkan mahasiswa semester II pendidikan kimia UIN Sunan Gunung Djati Bandung yang berjumlah 39 mahasiswa. Instrumen yang digunakan adalah tes uraian yang sebelumnya divalidasi dan diuji reabilitasnya. Hasil penelitian menunjukkan kemampuan kognitif mahasiswa pada dimensi pengetahuan konseptual mencapai presentase tertinggi sebesar 80%, prosedural 63%, dan metakognitif 70%. Sedangkan proses kognitif mengaplikaskan mencapai presentase tertinggi sebesar 85%, menganalisis 79%, mengevaluasi 77% dan mencipta 34%.Kata kunci: Kemampuan kognitif mahasiswa, Asam-basa, Taksonomi Bloom Revisi

Natural Dyes Characterization of Local Plants as Acid-Base Indicator Nelly Dayanti; Silpia Vilda Saputri; Arit Arit; Rini Muharini; Masriani Masriani
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 1 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Hanjuang, mangosteen, putat, and tabelian plants are used by people of Lanjak deras Village as natural dyes for woven cloth and food so that they can be used as an alternative substitute synthesis indicators that are limited in a remote area. The purpose of the study is to determine the best type of solvent in extracting the samples, pH range, UV spectrum profiles, precision, and accuracy of the plant's extract as indicator. The sample was the plants that are used by the people of West Borneo as natural dyes, namely putat flower, tebelian stem, mangosteen leave, and hanjuang leave. Each sample was macerated with four types of solvents, namely aquadest, ethanol, methanol, and (1:1) ethanol:methanol, then the extract was testing by pH range. The extracts providing color changes were determined for its UV-Vis spectrum profile, stability, accuracy, and precision. The results showed that ethanol and methanol were suitable for extracting mangosteen leaves, methanol for putat flowers, ethanol for hanjuang leaves, and (1: 1) ethanol:methanol for tebelian stems. Mangosteen leaf extract, putat flower, and tebelian stem gave a pH range of 12-14, while hanjuang leaf extract did not change color. The phytochemical test results and UV spectrum profile of mangosteen leaf extract, putat flower, and tebelian stem indicated the presence of phenolic compounds. The powder and extract solution had high stability. Mangosteen leaf extract, putat flower, and tebelian stem had precision and accuracy with the medium category. These data indicated that mangosteen leaf extract, putat flower, and tebelian stem have potential as indicators of acid-base.

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Indah Langitasari

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