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Jurnal Pendidikan Kimia (JPKim)

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Published by Universitas Negeri Medan

ISSN : 20853653 EISSN : 25493116 DOI : 10.24114

Core Subject : Science, Education, Social,

Biochemistry, Genetics & Molecular Biology Chemistry Education Environmental Science

Jurnal Pendidikan Kimia (JPKim) yang dikelola Program Pascasarjana Universitas Negeri Medan terbit 3 kali setahun, yakni bulan April, Agustus dan Desember. JPKim menerbitkan artikel ilmiah hasil-hasil penelitian pendidikan kimia dan kimia fundamental. JPKim juga menerbitkan artikel Review terkait Pendidikan Kimia dan Kimia.

Arjuna Subject : -

Articles 352 Documents

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The effectiveness of analytical chemistry problem based learning model on student learning outcomes Marnida Yusfiani; Ahyani Ridhayani Lubis; Fuadaturrahmah Fuadaturrahmah; Mei Salwa Siregar
Jurnal Pendidikan Kimia (JPKIM) Vol 14, No 3 (2022): December
Publisher : Pascasarjana Universitas Negeri Medan

This study aims to get a value of the effectiveness of students in learning analytical chemistry. The subjects carried out in this study were 30 Tanjungbalai Polytechnic students. The method used is to analyze the pre-test and post-test as well as data on the frequency distribution of the G factor. From the results of the study it can be concluded as follows 1). The value of the pre-test results showed that out of 30 students there was 1 person (3.33%) with the highest score with a score of 74. For 29 people (97.67%) were declared not to have passed because the score was below 74. 2). The standard deviation value is 6.33 with a variance of 40.110. 3). the posttest score of 5 people with the highest score of 90 with a percentage of 16.67%, and 83.33% showed a score below 90 and passed the PBL Chemistry Analysis lesson. The conclusion from the results of the increased learning outcomes in the analytical chemistry course was obtained that the g factor value was 0.56 in the moderate category and a percentage of 56.16% in the quite effective category.Keywords: Analytical chemistry; Learning improvement results; PBL model; Learning outcomes

Antioxidant activity and identification of flavonoid compounds in Patat leaves (Phrynium capitatum) ethyl acetate extract Ahmad Fathoni; Alhady Nareswara Candraditya; Tarso Rudiana
Jurnal Pendidikan Kimia (JPKIM) Vol 14, No 3 (2022): December
Publisher : Pascasarjana Universitas Negeri Medan

Flavonoids are the biggest compound from the phenolic group that has the function of antioxidants. One of the plants with flavonoids is patat (Phrynium capitatum), which is usually used as food wrapping material. This study aims to quantify total flavonoid content, antioxidant activity and identify flavonoids from patat leaves ethyl acetate extract. Patat leaves sample cleaned, dried, and grinded. Grinded patat leaves were macerated gradually for 2 × 24 hours with n-hexane, ethyl acetate, and methanol solvent. The extract undergoing total flavonoids test guided with AlCl3 and CH3COONa. Extract with the biggest flavonoids content proceed to antioxidant activity test by SOD (superoxide dismutase) method and analyzed for the flavonoid structure by UHPLC MS/MS (ORBITRAP HRMS). The biggest total flavonoids are ethyl acetate extract with 8.678 mg QE/g; then methanol extract with 5.296 mg QE/g; and n-hexane extract was not tested because of negative results in the qualitative test. The antioxidant activity of the ethyl acetate extract of patat leaves is classified as inactive, with an Ic50 value of 488.299 ppm. The low antioxidant activity is due to the sample, which is still a matrix containing many compounds. The flavonoid compounds identified by its fragmentation pattern were kaempferide, formononetin, and pinostrobin.Keywords: Antioxidant; Flavonoids; Patat; Total flavonoids; UHPLC MS/MS

The effect of argumentation-oriented learning models, inquiry-based learning models and science process skills on students' argumentation ability in chemistry Nurul Rahmiah Fitri; Muhammad Rusdi; Muhammad Haris Effendi-Hasibuan
Jurnal Pendidikan Kimia (JPKIM) Vol 14, No 3 (2022): December
Publisher : Pascasarjana Universitas Negeri Medan

One of the models whose learning syntax matches the science process skill component and students' argumentation ability is the inquiry model. Inquiry models have been widely applied, such as Guided Inquiry Based Learning (GIBL), and modified, such as the Argument Driven Inquiry (ADI) and Argumentative Inquiry Blended Learning (AIBL) learning models, where the ADI and AIBL learning models in the learning syntax have been integrated with argumentation activities. The purpose of this study was to examine the effect of learning models and students' science process skills on students' argumentation ability. The research design used a 3 x 2 factorial design with a mixed method. The results showed that: (1) there was an effect of argumentation-oriented learning on the inquiry learning models on students' argumentation ability; (2) there is an effect of science process skill level on students' argumentation ability; and (3) there is no interaction between argumentation-oriented learning on the inquiry learning models and the level of science process skill on students' argumentation ability.Keywords: Argumentation ability; Argument driven inquiry; Argumentative inquiry blended learning; Guided inquiry-based learning; Science process skills

The effect of temperature and pyrolysis time of plastic waste in producing methane Holisha Widiyanto; Boima Situmeang; Dina Alva Prastiwi; Ninik Triayu Susparini; Isna Laitusholihah
Jurnal Pendidikan Kimia (JPKIM) Vol 14, No 3 (2022): December
Publisher : Pascasarjana Universitas Negeri Medan

Plastic waste is a major environmental problem due to its widespread presence and lack of economic value. Pyrolysis is a process that can decompose plastic waste and produce methane gas, liquid, and solid products. This study aimed to investigate the factors that affect methane gas production and the amount of methane gas produced during the pyrolysis of various plastics, including a black plastic bag and plastic with aluminium foil. The results showed that the aluminium foil plastic produced more methane gas than the black bag, with optimal gas content at 7.74% for the aluminium foil plastic and 3.48% for the black bag. The type of plastic, time, and temperature all significantly affected the yield of methane gas produced. In addition, the interaction between variables in plastic type, time and temperature greatly affects the yield of methane gas (CH4) obtained, because the type of plastic F count (2904) is higher than F table 0.05 (4.00), at temperature F count (5449) is greater than F table 0.05 (2.76), when F count (746) is greater than F table 0.05 (2.76). In conclusion, the snack foil produced more methane gas than the black bag because it was made of low-density polyethylene and contained aluminium ions that catalysed the decomposition of the material, resulting in an increase in the amount of methane gas produced.Keywords: Methane gas; Pyrolysis; Plastic; Waste

Analysis of critical thinking ability based on student gender through the implementation of independent curriculum in chemistry learning Leony Sanga Lamsari Purba
Jurnal Pendidikan Kimia (JPKIM) Vol 14, No 3 (2022): December
Publisher : Pascasarjana Universitas Negeri Medan

The implementation of the independent curriculum in high schools after the Covid-19 pandemic has become a challenge for teachers and education implementers because the demands of 21st century education must fulfill the 4C skills, one of which is critical thinking for male and female students. This research is a descriptive quantitative research, with a one group control posttest only research design, to analyze students' critical thinking skills in chemistry learning with an independent curriculum when viewed from gender differences. The population in this study is students senior high school in Jakarta, and the samples used in this study were 58 students consisting of 34 male students and 22 female students who were taken by random technique. Instrument test in this study was multiple choice questions consisting of 15 questions, which consisted of 3 sections according to Bloom's taxonomy, namely questions number 1-5 on C4, numbers 6-10 on C5 and numbers 11-15 on C6. The test instrument used is valid through the revision results according to the expert validator's input. The instruments used to obtain information regarding critical thinking skills were analyzed descriptively and the average male score was 56.67 (N=34), while for female it was 57.27 (N=22). Based on these data, the difference in critical thinking ability when viewed from gender differences is only 0.60 on a scale of 100 (Sig. <0.05). Furthermore, further test results show that there are differences in the critical thinking abilities of male and female students when learning chemistry in the independent curriculum.Keywords: Critical thinking; Chemistry; Curriculum; Gender

Synthesis and characterization of reduced graphene oxidation from corn cob waste Dyah Suci Perwitasari; Adinata Shafi Wahyudi Suwarno; Muhammad Nauli Rizqi Akbar
Jurnal Pendidikan Kimia (JPKIM) Vol 14, No 3 (2022): December
Publisher : Pascasarjana Universitas Negeri Medan

Graphene is the latest carbon-based nanomaterial with wide applications and has superiority in electrical, thermal, and high conductivity properties. This study aims to synthesize and characterize reduced graphene oxide (rGO) from corncob waste using the modified Hummer method. which was carried out by removing the NaNo3 material. This synthesis used corncob waste that was made into charcoal with a particle size of 100 mesh with an oxidation time of 5 days. Structural analysis of rGO used Fourier Transform Infa Red (FTIR) and X-ray diffraction (XRD) testing. The results of FTIR testing showed a wave peak at 1568.82 cm-1 with C=C bonds which indicated that rGO was formed. The XRD test results showed a diffractogram peak at an angle of 2θ ~ 24.6635 which is typical of rGO materials.Keywords: Corncob waste; Graphene; Graphite; Modified hummer; rGO

The effect of E-LKPD on the inquiry-flipped classroom model and self-efficacy on students' creative thinking ability Suci Desmarani; Muhammad Rusdi; Haryanto Haryanto; Sugeng Triwahyudi
Jurnal Pendidikan Kimia (JPKIM) Vol 14, No 3 (2022): December
Publisher : Pascasarjana Universitas Negeri Medan

The active role of students is also very closely related to the confidence that students have in solving various problems and discovering concepts in chemical bonding material. This study aims to see the effect of the inquiry-flipped classroom model assisted by E-LKPD media on students' creative thinking abilities in chemical bonding material. The sample used was 2 classes at Al-Falah High School, Jambi City. The data collection instruments used were self-efficacy questionnaires and essay test questions. The results showed that there was an effect of E-LKPD on the inquiry-flipped classroom model on students' creative thinking abilities in chemical bonding material with a significance level of 0.027. Then students who have high self-efficacy with students who have low self-efficacy influence the ability to think creatively on chemical bonding material with a significance value of 0.04. Furthermore, there is no interaction between the E-LKPD in the inquiry-flipped classroom model and self-efficacy on students' creative thinking abilities in chemical bonding learning, which can be seen from the significance value of 0.694 > 0.05.Keywords: E-LKPD; Chemical bond; Creative thinking; Inquiry-flipped classroom; Self-efficacy

The effect of the application of the think talk write model and self-efficacy on students' critical thinking ability in the material reaction rate in SMA Adhyaksa 1 Jambi city Intan Aulia Sari; Haryanto Haryanto; Yusnaidar Yusnaidar
Jurnal Pendidikan Kimia (JPKIM) Vol 14, No 3 (2022): December
Publisher : Pascasarjana Universitas Negeri Medan

The ability to think critically is very important to support the progress of education. In developing good mastery of learning concepts, students' critical thinking skills are needed. The development of critical thinking skills can make students give up, so it takes a firm belief in students' abilities in overcoming difficulties so they can become more advanced. This study aims to see the effect of the Think Talk Write (TTW) and Self Efficacy on students' critical thinking skills in the matter of reaction rate. The sample used consisted of 2 classes at SMA Adhyaksa 1 Jambi City. The data collection instruments used were observation sheets, self-efficacy, and essay tests. The data analysis used was 2-way ANOVA. The results showed that learning using the TTW and Self Efficacy affected students' critical thinking skills with an average of 71% from meeting 1, meeting 2, and meeting 3. Then there is an interaction between the Think Talk Write and Self Efficacy on students' critical thinking skills seen from a significance value of 0.000 <0.05.Keywords:Critical thinking; Reaction rate; Self-efficacy; Think talk write

The contributing of chemistry learning in supporting education for sustainable development: A systematic literature review Adek Diah Murti; Hernani Hernani
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 1 (2023): April
Publisher : Pascasarjana Universitas Negeri Medan

This study aimed to examine the contribution of chemistry learning in supporting Education for Sustainable Development (ESD) and the types of competencies that can be developed through ESD. The method used is Systematic Literature Review (SLR), which consists of five stages, namely question formulation, locating studies, study selection and evaluation, analysis and synthesis, reporting and using the results. Based on a study of 38 journal articles from International and National Journal, the contribution of chemistry learning in supporting ESD is manifested in the form of integrating ESD concepts into learning models, incorporating ESD concepts in a chemistry learning context, and developing ESD concepts through learning designs and teaching materials. Through the implementation of ESD in chemistry learning, competencies that can be developed are communication, collaboration, problem solving, creative thinking, systems thinking, critical thinking, scientific literacy, sustainable environmental literacy, understanding, motivation, environmental awareness, and sustainable awareness. Chemistry education and ESD have strong link in many aspects of life, so that competencies developed through the implementation of ESD in the learning process will be able to improve the quality of education and environment.Keywords: A systematic literature review; Contributing of chemistry learning; Education for sustainable development

Instant broth powder of mutiara catfish (Clarias gariepinus) using the spray drying method as a natural flavor enhancer Diana Widiastuti; Siska Elisahbet Sinaga; Zahra Sahara Maharani; Eka Herlina; Ade Heri Mulyati; Farida Nuraeni; Fajar Anggraeni; Pham Van Hung
Jurnal Pendidikan Kimia (JPKIM) Vol 15, No 1 (2023): April
Publisher : Pascasarjana Universitas Negeri Medan

"Dumbo" catfish is a type of catfish that is widely consumed and cultivated. It includes the mutiara catfish (Clarias gariepinus) growing relatively fast and having a fairly high nutritional content. It can be used as a flavor enhancer in the form of instant broth powder. This research aims to determine the formulation and best quality of instant catfish broth powder products using the Spray Drying method as a natural flavor enhancer that the public likes and follows the Indonesian National Standard. This research was started by sampling the fish and separating the meat. Then, an analysis of fish meat, including a proximate test, was prepared and continued with making broth with different recipes based on the added weight of catfish meat (in percentage) with several spices used in several formulations: 75% (F1), 70% (F2), 65% (F3), 60% (F4) and 55% (F5) by boiling and mixing all the supporting ingredients according to the predetermined formulations. Next, the drying process was carried out using the Spray Drying method, followed by an organoleptic test to obtain a chosen formula and, finally, the quality of the instant Mutiara catfish broth powder product was tested. The instant powder (F4) was the selected product based on the organoleptic test, because this formula is the most preferred product by the panelists. The results of the analysis of physical, chemical, microbiological characteristics complied with SNI 01-4218-1996 concerning broth powder. In addition, the shelf life of this product with metallized plastic packaging was 1,028.24 days.Keywords: Broth powder; Catfish; Characterization; Shelf life

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