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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 12 Documents

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Search results for , issue "Vol 5, No 2 (2020)" : 12 Documents clear

Back Matter Vol 5 No 2 (Author Index, Subject Index, Author Guidelines, Acknowledgment) EduChemia EduChemia
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 2 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Synthesis, Characterization and Antioxidant Activity of Kobalt (II)-Hydrazone Complex Yulyani Nur Azizah; Irma Mulyani; Deana Wahyuningrum; Damar Nurwahyu Bima
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 2 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

The potency of the first-row transition metal complexes with Schiff's base ligand as an antioxidant has been widely studied by researchers. In this study, hydrazone-type Schiff base compounds, salicylaldehyde-2,4-dinitrophenylhydrazone (SDPH), resulted from the condensation of salicylaldehyde (1.5 mmol) and 2,4-dinitrophenylhydrazine (1.5 mmol) were synthesized and characterized with 1H-NMR. The synthesized SDPH was used as ligands in the formation of Co(II) metal complexes. The Co(II)-SDPH complexes were synthesized with reflux reaction at 60oC for 6 hours in molar ratio 1:3. Triethylamine is used to synthesis Co(II)-SDPH, which serves to deprotonate SDPH ligands. ESI-MS analysis showed that the complex is a neutral dimeric complex.The complex has the chemical formula [Co2(SDPH)2[(Et)3N]2(acn)2(OH)2} ([M+Na]+ = 1061 g/ mol), shown on the ESI-MS spectrum. Coordinate bonds between Co (II) metal ions with ligands are observed in the presence of shifting of the C=N wave number, as well as the loss of the vibrating peaks of the O-H groups to the infrared spectra of complexes. The IR spectrum of complexes was suggested that SDPH behave as a bidentate ligand through the azomethine nitrogen atom and phenolic oxygen atom. The ligand and its Co(II) complex have been screened for antioxidant activity against DPPH (2,2-diphenyl-1-picrylhydrazine). Based on the activity test results, the IC50 value of Co(II)-SDPH complex was lower than ligand. These results show that Co(II)-SDPH are potentials as antioxidants.

Utilization of Nata De Coco as Adsorben in Methyl Orange Adsorption Sani Widyastuti Pratiwi; Siska Novita Sari; Ratna Nurmalasari; Meli Indriani
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 2 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Methyl Orange was a textile waste that polluted the environment and harmed aquatic ecosystems and human life. It could affect the photosynthesis of oxygen regeneration and disrupt the biological activity of microbes in the water. One of the ways to deal with these wastes by adsorption using Nata de coco. Nata de coco was used as an alternative adsorbent made from cellulose, which was a waste of coconut water in the process of making it easy, inexpensive, and biodegradable. This study aims to determine the effect of contact time and mass of Nata de coco adsorbents on the adsorption of methyl orange. This research method includes three stages were adsorbent preparation, adsorption, and UV-Vis spectrometer analysis. The adsorption process was carried out with contact time variations of 30 and 60 minutes, variations in the mass of the adsorbent 0.05g; 0.1g; and 0.15g. The results showed the optimum adsorption conditions occurred at 60 minutes of contact time and an adsorbent mass of 0.15g with an adsorption efficiency of 44.66% and an adsorption capacity of 0.2066 mg/g.

Development of SETS-Based Teaching Materials in Acid-Base Accompanied by Critical Thinking Exercises and Moral Forming Rahmat Rasmawan
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 2 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

This study aims to produce SETS-based teaching materials in acid-base concept that can foster students' critical thinking skills and establish their morale. This study is Research and Development (R & D) refers to the Borg and Gall model, which has been modified into five stages; preliminary study, preparation of product draft, validation and revision of product draft, legibility test, and product draft revision. As the instrument, this study was using a questionnaire about resistances and obstacles, observation sheets in learning, interview guidelines, validation sheets of teaching materials draft, and legibility response questionnaires. Data obtained from questionnaires, learning observation sheets, and interview guidelines were analyzed descriptively qualitatively to get the representation of the learning process that has been conducted so far. The validation sheet and legibility response questionnaire were analyzed quantitatively to determine the validity and legibility levels of teaching materials. The results of expert validation show that the developed teaching materials have a direct link between science, the environment, technology and society in solving problems related to daily life and the students as users give positive responses to the developed teaching materials in terms of content, appearance, novelty, problems, direction and work instructions. Thus, teaching materials developed are valid and proper to be used in the learning process

Analysis of Students Misconception Using Certainly of Response Index (CRI) in the Periodic System of Elements Concept Yusran Ramadhan; Kartini Rahman Nisa; Sunarwin Sunarwin
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 2 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

This research aimed to investigate the students' understanding level and the occurrence of student's misconceptions about the periodic system of elements subject. Descriptive research with a qualitative approach is a research method used in this study, that is by explaining the data obtained from the result regarding the misconceptions that occur. The technique used in data collection was a test equipped with a choice of the confidence level of answer (TKJ), questionnaires, and interviews. The results showed that the level of understanding experienced by students was still very low, that is 20.2% of students identified as students who misconception about the subject and 8.5% understood the concept and 71.3% of students who did not understand the concept. The factors that caused the misconceptions were the lack of students' initial concepts and the basic abilities of students.

Enhancement of Interpretation and Inference Skills Through Guided Inquiry in Chemical Equilibrium Fajar Wisnu Pambudi; Dian Novita
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 2 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

This research aims to know the improvement of students' interpretation and inference skills, which are drilled through a guided inquiry learning model on chemical equilibrium material at SMAN 1 Driyorejo. This research used one group pretest and posttest design with a sample of 35 students in class XI SMAN 1 Driyorejo Kabupaten Gresik. The research procedure consisted of 3 stages, namely the preparation stage in the form of pre-research data collection, the stage of carrying out data collection, and the final stage in the form of data analysis. The research instrument consisted of an observation sheet on the implementation of learning, an observation sheet of students' activity, and the question sheet of interpretation and inference skills test. Data collection methods consist of observing the implementation of learning, students' activities, and interpretation and inference skills tests. It can be concluded in this study that (1) the implementation of learning at the first meeting, the second meeting and the third meeting in the range of 85% - 92% with good criteria, (2) student activities during learning get results at the first meeting until the third meeting that is above 90% so that student activities support learning to practice students 'interpretation and inference skills (3) Students' interpretation and inference skills in the teaching and learning process have increased from pretest and posttest with N-gain values in the medium and high criteria.

Development of Chemical Practicum Guide Oriented Chemoentrepreneurship in Colloid Synthesis Imas Eva Wijayanti; Rina Rahayu; Solfarina Solfarina
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 2 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

The large number of high school graduates who do not continue to college and their skills are not trained results they not being absorbed in the world of work. This problem can be solved by honing a skill, one of which is the ability to combine knowledge about chemistry with the manufacture of colloidal products. This study aims to produce a product in the form of chemical practicum guides for making chemoentrepreneurship-oriented colloids. This research used the R&D design with 3D Models (Define, Design, and Develop). The research begins with a needs analysis (Define), then design prototype through selecting the media, determining the format, and content of the product to be produced (Design), and the product validation stages through criticism or suggestions from the validators (Develop). The subjects of this study were students of class XI MAN 4 Pandeglang, who were selected by purposive sampling. Data validation results were analyzed using the Aiken'V method, and student response questionnaires to the product were measured using a Likert scale. The validation results of the product for each aspect of the practicum guides have a value of 0.78 (Aiken'V minimum table 0.76) and are declared valid. The product's limited trial results through a student response questionnaire obtained an average score of 93.8 with very good criteria. Data analysis results on the assessment of colloidal products in the form of student ability to make ice cream and simple water purifiers in groups 1, 2, 3, and 4 were 84.95; 79.57; 84,45; and 85.15. These results indicate that the research product in the form of a chemical colloid guideline can trigger students' creative and innovative skills.

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.

Antioxidant Activity of Mixed Katuk Leaf Extract and Honey Ahmad Fathoni; La Ode Sumarlin; Jane Ratini Putri; Narti Fitriana
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 2 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Antioxidants can be obtained from plants or animals. One of the plants that can be used as a source of antioxidants is katuk leaf (Sauropus androgynus (L.) Merr.) and honey. The content of compounds in both materials that function as antioxidants are phenolic, flavonoids, and vitamin C. This study aims to analyze the levels of total phenolic, flavonoids, vitamin C, antioxidant activity, the effect of different compositions on combination treatments, and analyze the relationship between phenolic levels and vitamin C with antioxidant activity from the test sample. This study used an experimental method with a completely randomized design. Antioxidant activity was tested using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) method. The results showed phenolic levels of all test samples ranged from 0.509-23.205 mg GAE/g samples; flavonoids amounted to 0.027-17.329 mg QE/g samples, vitamin C amounted to 15,917-101,705 mg AA/g samples and IC50 of 114.213-20727.500 mg/l. The combination treatment with more katuk leaf composition can increase the levels of compounds and antioxidant activity. Phenolic levels and vitamin C have a moderate relationship with antioxidant activity with the correlation coefficient values of -0.480 and -0.500.

Front Matter Vol 5 No 2 (Cover, Editorial Board, Preface, Table of Contents) EduChemia EduChemia
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 2 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

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Editorial Address Department of Chemistry Education - Universitas Sultan Ageng Tirtayasa Address : Jl. Ciwaru Raya No. 25, Sempu, Kota Serang, Banten 42117, Indonesia

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Abstract

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Contact Name
Indah Langitasari

Contact Email
educhemia@untirta.ac.id

Phone
-

Journal Mail Official
educhemia@untirta.ac.id

Editorial Address
Department of Chemistry Education - Universitas Sultan Ageng Tirtayasa Address : Jl. Ciwaru Raya No. 25, Sempu, Kota Serang, Banten 42117, Indonesia

Location
Kab. serang,

Banten

INDONESIA