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EduChemia (Jurnal Kimia dan Pendidikan)
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 10 Documents
 1 
Search results for , issue "Vol 7, No 2 (2022)" : 10 Documents clear
Electrolysis Cell Learning Media Based on Virtual Reality Millealab Indah Langitasari; Isriyanti Affifah; Ratna Sari Siti Aisyah; Muhammad Alfian Pratama
EduChemia (Jurnal Kimia dan Pendidikan) Vol 7, No 2 (2022)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v7i1.17576

Abstract

The electrolytic cell is a chemical material with abstract and concrete concept characteristics. Students often need help learning this material, especially connecting concrete and abstract concepts. Therefore, media is needed that can facilitate students in understanding electrolytic cell material, which is made interesting by utilizing virtual reality technology. The purpose of this research is to produce chemistry learning media based on virtual reality with a feasible and practical MilleaLab platform. The research uses the ADDIE development model (analysis, design, develop, implement, evaluate). The product of this research is virtual reality-based learning media on the MilleaLab platform. The validation assessment from media and material experts with an error rate of 5% based on the Aiken scale obtained Vcount ≥ Vtable (Vtable = 0.87). Each value in the validation of media and material experts is 0.89 and 0.87 with the Valid category. The results of assessing student responses regarding the practicality of this learning media get 88% in the Very Good category. Based on these results, it can be concluded that MilleaLab virtual reality-based learning media on electrolytic cell material is a learning medium that is practical and feasible to use.
Bioplastic Based on Taro Starch Modified Polyvinyl Alcohol and Eggshell (Starch-PVA-CT) with Degradability Study Siti Qomariah; Intan Syahbanu; Puji Ardiningsih
EduChemia (Jurnal Kimia dan Pendidikan) Vol 7, No 2 (2022)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v7i2.14660

Abstract

Taro (Colocasia esculenta L. Schott) was potentially a raw material in the fabrication of bioplastic because of its biodegradability properties. Egg shells can be used as a filler in bioplastics because of their rich in calcium carbonate (CaCO3). This study aims to examine eggshell addition to starch-PVA-CT bioplastic properties. Taro tuber and eggshell were extracted first to obtain taro starch and calcium carbonate. Obtained products were incorporated with PVA, glycerol, and citric acid to produce bioplastics. Characteristic tests in this study included functional group analysis, hydrophilicity, mechanical properties, and degradation study in rivers. The taro starch obtained from this study was 4.8% from 900 g of taro tubers. Functional group analysis of bioplastics showed the presence of functional groups O-H, C-H, C-O ester, and C=O carbonyl. The hydrophilicity test showed the best percentage of water resistance in CL PVA/starch bioplastic (50% CT), and the decomposition in the river water environment reached 82%. The test results in this study showed that the best variation was in CL PVA/starch bioplastic (25% CT) with a tensile strength value of 2.05 Mpa and elongation at a break of 4%. These results meet the standards of SNI 7188.7:2016.
Thermal Stability Analysis of Cellulose From Sago Fiber Waste (Metroxylon sago) Nurmalasari Nurmalasari; Sastriana Jaya Lestari; Mimi Syamsuddin; Sukarti Sukarti; Muhammad Nur Alam
EduChemia (Jurnal Kimia dan Pendidikan) Vol 7, No 2 (2022)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v7i2.13491

Abstract

Sago pulp is a lignocellulosic waste rich in cellulose, so that it can be used optimally as a source of carbon and cellulose. Fixed carbon can be obtained maximally by determining the carbonization temperature. This research aims to determine the temperature of the cellulose sample starting to decompose and the energy required at the time of decomposition. The process of extracting cellulose from sago fiber waste uses NaOH alkalinization for delignification, bleaching with H2O2, and hydrolysis with HCl. Identification of lignin in sago fiber is known by the appearance of the C=O group in the wave region of 1734.01 cm-1 with strong intensity; after extraction, no peak number was found in the extracted cellulose FTIR spectrum. TGA analysis of cellulose underwent two stages of mass change, the first stage of decomposition of water molecules at a temperature of 47°C-203°C obtained a mass decrease of 5.69%, and the second stage of decomposition at a temperature of 287°C-397°C obtained a mass decrease of 58.95%. DSC analysis obtained two thermal properties of physical changes contained in two endothermic peaks, the first peak of water evaporation which required energy of 28,1120 J/g, and the second peak of decomposition, which required energy of 9.6188 J/g.
Experiment Design Analysis of Corrosion Inhibitor from Papaya Leaf Extract for Contextual Chemistry Learning Fuadatul Mukoningah; Retno Aliyatul Fikroh; Shofrina Surya Dewi
EduChemia (Jurnal Kimia dan Pendidikan) Vol 7, No 2 (2022)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v7i2.15063

Abstract

The implementation of the 2013 curriculum, which focuses on the phenomenon of daily life, is part of the government's effort to improve the quality of education in Indonesia. Corrosion is one of the most common problems, so learning how to overcome corrosion is essential. The tannin content of papaya leaves has the potential to be a corrosion inhibitor. As a result, this study aims to investigate papaya leaf extract as a corrosion inhibitor and its potential as a contextual learning aid. The qualitative descriptive method was used in this study, with data collected through literature studies, observations, interviews, and experiments. The results showed that papaya leaf extract could be used as a corrosion inhibitor with a 73 percent efficiency in using a 20% inhibitor. Based on literature reviews, observations, and interviews with educators and students in Yogyakarta, papaya leaf experiments as an inhibitor can be a contextual learning alternative to corrosion material in senior high school in terms of finances, pedagogy, and human resources readiness.
Optimization of Biofuel Production from Used Cooking Oil Using Natural Zeolite Catalyst Isalmi Aziz; Siti Nurbayti; Reza Falepi
EduChemia (Jurnal Kimia dan Pendidikan) Vol 7, No 2 (2022)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v7i2.13892

Abstract

Petroleum is still the primary energy used in the world. Its diminishing production is the trigger to find alternative energy to replace it. Biofuel is an alternative energy that has the potential to replace petroleum because it is renewable, environmentally friendly, and easy raw material. Waste such as used cooking oil can be used as raw material for making biofuels. The low price can reduce the cost of biofuel production. The conversion of oil into biofuel can be done using catalytic cracking with natural zeolite as a catalyst. This study aims to determine the optimum conditions for making biofuel from used cooking oil and determine its physical and chemical properties. The catalytic cracking process is carried out using an autoclave reactor. Used cooking oil and natural zeolite were introduced into the reactor, and the reaction was carried out by varying the time (1, 2, 3 hours), temperature (325, 350, 375oC), catalyst concentration (3, 5, 7%), and catalyst size. The product is distilled to produce biofuel (liquid), gas, and residue. The optimization results show that 3 hours, a temperature of 375oC, a catalyst concentration of 7%, and a catalyst size of 180µm are the optimum conditions for catalytic cracking with 44.94% biofuel yield. The resulting biofuel contains 73.48% hydrocarbons and 26.52% fatty acids. The hydrocarbon composition consists of 19.32% gasoline, 12.82% kerosene, and 35.11% diesel. The density of the biofuel produced is 0.8835g/mL, the flashpoint is 68oC, and the pourpoint is 27oC.
Linoleic Acid Isolation from Watermelon Seeds Oil (Citrullus lanatus L) with Urea Inclusion Method Divina Anindya Della; Hartati Soetjipto; November Rianto Aminu
EduChemia (Jurnal Kimia dan Pendidikan) Vol 7, No 2 (2022)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v7i2.15128

Abstract

Nutritional problems still become a crucial issue in Indonesian public health. Fulfillment of nutritional balance is expected to improve life quality. In humans, one of the nutrients that play a role in the growth of brain and nervous system functions is PUFA, such as omega-6 and omega-3. Besides, fulfillment of nutritional balance can prevent some diseases; especially linoleic acid used to prevent some diseases. Linoleic acid is an omega-6 and essential fatty acid. Linoleic acid is the main essential fatty acid because it is the precursor for GLA, DGLA, and AA. Omega-6 works with omega-3 and some omega-3 benefits are supported or can arise by omega-6 presence. Studies reveal that watermelon contains high linoleic acid. This study aimed to determine the optimum temperature and ratio of fatty acids: urea for the isolation of linoleic acid from watermelon seed oil. The method used was urea inclusion with a variety of temperatures (-6oC, 6oC, 18oC) and the ratio of fatty acid: urea (1:1; 1:3; 1:5). The results showed the optimum watermelon seed oil linoleic acid isolate at 18oC and the ratio of fatty acids: urea 1:5 with linoleic acid purity (%) of 82.53%.
Electrochemical Detection of Pb(II) Using A Pencil Electrode with Square Wave Anodic Stripping Voltammetry Method Muhammad Zamhari; Muhamad Aditya Hidayah; Gerda Pintoko Tunjungsari; Endaruji Sedyadi
EduChemia (Jurnal Kimia dan Pendidikan) Vol 7, No 2 (2022)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v7i2.14756

Abstract

This work describes a simple and inexpensive Pb(II) determination by a pencil electrode using the square wave anodic stripping voltammetry (SWASV) method. This research was applied using a batch cell system on 10 mL of 0.1 M acetate buffer pH 4.5. The precision was performed with repeatability and reproducibility in Pb(II) concentrations of 0.2, 0.4, 0.6, and0.8µg mL-1. Two linear ranges were obtained in the concentration of 0.1–1.0 and 2.0–8.0 µg mL-1. This method offers a detection limit of 0.07 µg mL-1 and a quantification limit of 0.24 µg mL-1. The technique performed good repeatability (RSD= 7.28–9.53%) and good reproducibility (RSD=7.07–15.10%). The precisions are accepted according to the Association of Official Analytical Chemists (AOAC) standard (RSD repeatability <11% and RSD reproducibility <16% at a concentration of 1 µg mL-1). The method offered high operational stability up to 18 measurements (RSD=4.6%). The technique performs acceptable results with low random error in determining Pb(II).
Development of pH Measuring Strip Test Based On West Kalimantan Local Plant Aprianus Aril; Masriani Masriani; Husna Amalya Melati
EduChemia (Jurnal Kimia dan Pendidikan) Vol 7, No 2 (2022)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v7i2.15252

Abstract

Synthetic acid-base indicators possess some disadvantages. Therefore, it is necessary to develop a natural acid-base indicator made from a mixture of plant extracts, which has a strip form, is safe, eco-friendly, has a wide pH range, and has clear color changing. This research aims to determine the pH range, make a pH indicator in the strip form, and produce a biodegradable acid-base indicator made from a mixture of Melastoma malabathricum flower, Dioscorea alata rhizome, Syzygium paniculatum leaves, Garcinia fruit peel, Eleutherine bulbosa rhizome extracts. Plant extracts were obtained using the maceration method. pH range was evaluated using the visual method by sensing the color changing in the pH range from 1 to 14. pH indicator strip was made by applying filter paper in the strip form into the extract mixture for 2 hours. The biodegradable property of acid-base indicator strips was established by measuring indicator strip degradation after planting it in the ground for 20 days at room temperature. The results showed that the acid-base indicator strip made from a mixture of plant extracts was able to give a color change from pink to light green in the pH range of 3-8 and can be decomposed completely after planting it in the ground for 20 days. Thus, it indicated that a natural pH indicator strip based on West Kalimantan plants has the potential to be developed as a safe and effective acid-base indicator to substitute synthetic acid-base indicators. 
Learning Persistence and Student Metacognitive Ability Using The Discovery Model fuldiaratman fuldiaratman; Issaura Sherly Pamela; Dewi Mariana Elisabeth Lubis
EduChemia (Jurnal Kimia dan Pendidikan) Vol 7, No 2 (2022)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v7i2.15470

Abstract

This study aims to describe the learning persistence and metacognitive abilities of students through discovery learning models based on blended learning. This research uses a mixed qualitative-quantitative approach with embedded design research. The sample in this study was 50 students of class X MIA, SMA Negeri 4 Jambi City selected by purposive sampling technique. The data collection instruments used were in the form of a study persistence questionnaire, students' metacognitive ability test questions, and interview sheets. The data will be analyzed qualitatively using miles and hubarman and quantitatively analyzed using descriptive statistics and inferential statistics. The inferential statistics performed consisting of assumption tests (normality test, homogeneity test, and linearity test) and hypothesis testing (T test and correlation test). The results of this study indicate that there is a significant difference between learning perseverance and metacognitive ability of students of class XI MIA 1 and class XI MIA 2, with a significance value of 0.011 for student learning persistence and 0.007 for students' metacognitive ability. In addition, it is known that there is a significant correlation between the student's learning persistence variable and the metacognitive ability of class XI MIA students at SMA Negeri 4 Jambi City, which is 0.000.
Patterns of Students' Macroscopic, Submicroscopic, and Symbolic Representation Ability in Acid-Base Topic Mujibaturrahmi Mujibaturrahmi; Sri Winarni; Latifah Hanum
EduChemia (Jurnal Kimia dan Pendidikan) Vol 7, No 2 (2022)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v7i2.14250

Abstract

Abstract concepts of chemicals are generally presented in three chemical representation levels: macroscopic, submicroscopic, and symbolic. This study aims to; (1) evaluate each representation ability; (2) determine how to evaluate the pattern of representational abilities; and (3) evaluate the patterns of each student's macroscopic, submicroscopic, and symbolic representation abilities. Qualitative descriptive has been used as the design of this study. Twenty-one multiple-choice questions based on macroscopic, submicroscopic, and symbolic representations have been designed with validation results from two experts, which are 100% valid, and with the Kuder Richardson formula (K-R 20), the reliability value is 0.84. The subjects in this study were all students of class XI MIPA at SMA Negeri 8 Banda Aceh. The research was conducted online via a google form. The results showed that students with high categories of macroscopic, submicroscopic, and symbolic representation skills were 61, 18, and 51%, respectively. 9.8% of students can master the three levels of representation with high criteria. The pattern of representation ability is mainly owned by 24.4% with high macroscopic and symbolic representation abilities but low submicroscopic representation abilities. Because submicroscopic representation lags macroscopic and symbolic, explanation in chemistry should always involve submicroscopic representations other than macroscopic and symbolic.

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