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Chimica Didactica Acta : Journal of Chemistry and Chemistry Education
Published by Universitas Syiah Kuala
ISSN : 23384522     EISSN : 28096789     DOI : https://doi.org/10.24815/jcd
Core Subject : Science, Education,
Chemistry Education
Chimica Didactica Acta is a peer reviewed journal publishing research articles that address the topics of chemistry and chemistry education and practices. We focus on the topics but not limited to organic chemistry, inorganic chemistry, analytical chemistry, biochemistry, physical chemistry and educational chemistry and practices
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 80 Documents
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THE EFFECT OF PROCESS ORIENTED GUIDED INQUIRY LEARNING (POGIL) MODEL ON SCIENCE PROCESS SKILLS (SPS) AND STUDENTS' COGNITIVE ABILITIES ON THE CONCEPT OF REACTION RATE Said Idrus; Mahmud Mahmud; Zainuddin Muchtar
Chimica Didactica Acta Vol 9, No 1: June 2021
Publisher : FKIP USK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (228.792 KB) | DOI: 10.24815/jcd.v9i1.20080

Abstract

This study aims to determine the effect of the Process Oriented Guided  Inquiry Learning (POGIL) model on Science Process Skills (SPS), cognitive abilities and the correlation between SPS and students' cognitive abilities on the reaction rate concept. The sample in this study were 35 students of class XI SMA Negeri Seribu Bukit 2016-2017 academic year. The data was collected through observation and test. 20 multiple choice questions (alpha:0.81) were used to collect data of student’s SPS. While students' cognitive abilities were obtained by pre-test and post-test using 20 multiple choice questions (alpha:0.84). The distributed normally and homogeneously. The hypothesis was tested by using Paired Sample t-Test at a significance level of 0.05. Based on the data analysis and hypothesis testing carried out, there was a significant difference in the effect of the POGIL model on Science Process Skills (SPS), cognitive abilities and significant interactions between SPS and students' cognitive abilities on the material reaction rate, indicated by the value of each probability or sig. 0,000, so it can be concluded that the results of testing the hypothesis reject Ho or accept Ha at the 5 percent alpha level.
PENGEMBANGAN MEDIA PEMBELAJARAN INTERAKTIF BERBASIS GOOGLE SLIDE PADA MATA PELAJARAN KIMIA SMA KELAS X MATERI STRUKTUR ATOM Zulfadli Zulfadli; Kana Puspita; Sulastri Sulastri
Chimica Didactica Acta Vol 10, No 2: December 2022
Publisher : FKIP USK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (177.88 KB) | DOI: 10.24815/jcd.v10i2.27310

Abstract

The research entitled "Development of Google Slide-Based Interactive Learning Media on Chemistry Subjects in Class X High School Materials on Atomic Structure", has been carried out using Research and Development (RD) research types and the ADDIE model. The purpose of this study is to develop a google slide learning media that is proven to be suitable for use. The google slide-based learning media on atomic structure material was tested for feasibility by expert validators (media and materials) and students of MAS Darussyari'ah, Banda Aceh city. The instrument in this study was a media feasibility questionnaire sheet and student response sheets. The results of data analysis showed that the google slide media was very feasible to use with the percentage of media feasibility validation results of 93%. Students responses to the media showed a positive response with a percentage of 86.37% which was categorized as very good. Based on the data obtained, it can be concluded that the Google Slide media is very suitable to be used as a learning medium and received positive responses from students.
PENERAPAN MODEL PEMBELAJARAN KOOPERATIF TIPE JIGSAW BERBASIS LESSON STUDY PADA MATERI GAYA ANTAR MOLEKUL KELAS XI MAN RUKOH BANDA ACEH TAHUN PELAJARAN 2012/2013 Irna Aditya
Chimica Didactica Acta Vol 2, No 1 (2014)
Publisher : FKIP USK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (443.147 KB)

Abstract

Telah dilakukan penelitian tentang “Penerapan Model Pembelajaran Kooperatif Tipe Jigsaw Berbasis Lesson StudyPada Materi Gaya Antar Molekul Kelas XI MAN Rukoh Banda Aceh Tahun Pelajaran 2012/2013”. Penelitian inibertujuan untuk mengetahui aktivitas dan ketuntasan belajar siswa pada materi gaya antar molekul setelahmenerapkan model pembelajaran tipe Jigsaw berbasis lesson study. Subjek penelitian adalah siswa kelas XI IA 1,dengan jumlah siswa 29 orang yang terdiri dari 18 orang siswa laki-laki dan 21 orang siswa perempuan. Penelitian inidilaksanakan mulai bulan Agustus sampai bulan November 2012 bertempat di MAN Rukoh Banda Aceh.Pengumpulandata dilakukan melalui lembar observasi aktivitas siswa, lembar refleksi, dan tes tertulis. Berdasarkan hasil penelitianmenunjukkan siswa aktif dalam mengikuti proses pembelajaran dengan nilai rata-rata 82 yang diperoleh dari lembarobservasi aktivitas siswa dan lembar refleksi. Ketuntasan belajar siswa setelah mengikuti tes tertulis pada materi gayaantar molekul dengan penerapan model pembelajaran kooperatif tipe Jigsaw berbasis lessonstudydengan nilai ratarata75,92 dan persentase ketuntasan 100% dari 27 orang siswa (semua tuntas), dibandingkan dari ketuntasan belajarsiswa pada tahun lalu dengan materi sama tetapi tidak menggunakan model pembelajaran kooperatif tipe Jigsawberbasis lesson study yaitu nilai rata-rata 63,12 dengan persentase ketuntasan 79,17%. Hal ini menandakan bahwapenerapan model kooperatif tipe Jigsaw berbasis lesson study dapat meningkatkan aktivitas, dan ketuntasan belajarsiswa serta mendapat manfaat yang positif bagi para guru yang mengikuti kegiatan lesson study dalam merancangperencanaan pembelajaran dan meningkatkan keprofesionalan guru dalam mengajar.
ANALISIS KEBUTUHAN PENGEMBANGAN MODEL PEMBELAJARAN KIMIA DIRECT INSTRUCTION BERORIENTASI THINKING INDUCTIVELY UNTUK MENUMBUHKAN LIFE SKILL PESERTA DIDIK Asih Widi Wisudawati
Chimica Didactica Acta Vol 1, No 1 (2013)
Publisher : FKIP USK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (112.586 KB)

Abstract

This study aims to analyze the needs of students and teachers in the learning process chemicals to be used for the development of Direct Instruction model of teaching chemistry Thinking inductively oriented to foster students' life skill. This study population is the entire SMA / MA in Yogyakarta. The samples are purposive sampling determined by taking into account the achievement of learning outcomes. The study sample consisted of 2 (two) MA, 7 (seven) SMA, 2 (two) private high school. Data was gathered from observation, interview guidelines and questionnaires. analyzed descriptively and interpretative, equipped crosscheck the data and data sources. conclusions of this study (1) has identified three (3) learning model commonly implemented by teachers in the learning process chemistry, (2) some of the barriers / obstacles in applying the model of learning-oriented thinking inductively, (3) life skills students have developed the maximum.
DEVELOPMENT OF BULLETIN AS A LEARNING MEDIA ON ELECTROLYTE AND NON-ELECTROLYTE SOLUTION MATERIALS IN CLASS X MAS DARUL IHSAN ACEH BESAR Wildan Mabrura; Zulfadli Zulfadli; Latifah Hanum
Chimica Didactica Acta Vol 8, No 1 (2020)
Publisher : FKIP USK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (162.406 KB) | DOI: 10.24815/jcd.v8i1.25246

Abstract

This study aims to develop, analyze the feasibility and describe the responses of students and teachers according to the newsletter learning media on electrolyte and non-electrolyte solution material. This type of this research is (Research and Development/ RD). The newsletter learning media developed in this study according to ADDIE model which has five stages: (1) analysis, (2) design,(3) Development (4) Implementation and (5) Evaluation. This research was conducted at the school of  MAS Darul Ihsan Aceh Besar with 3 chemistry teachers and 31 students taken from class X. The appropriateness of the newsletter media was assessed by the research supervisor. The percentage of teacher and student responses to the newsletter media that was developed was 97.22% and 83.97%  with the very good category. Based on the results of the study, it can be concluded that the developed newsletter media is very suitable for use in the learning process of electrolyte and non-electrolyte solution materials.
IMPLEMENTATION OF THE TOGETHER LEARNING MODEL TO IMPROVE STUDENTS' LEARNING OUTCOMES ON THE CONCEPT OF MOLECULAR GEOMETRY Rusman Rusman; Reza Resita Vonna; Ratu Fazlia Inda Rahmayani
Chimica Didactica Acta Vol 8, No 2 (2020)
Publisher : FKIP USK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (186.432 KB) | DOI: 10.24815/jcd.v8i2.23027

Abstract

The purpose of this study was to analyze student learning outcomes, describe student activities and describe student responses after the application of the learning together model on the material of molecular form at SMA Negeri 1 Krueng Barona Jaya. This is a descriptive study with a qualitative approach. The population in this study were students of class X SMA Negeri 1 Krueng Barona Jaya. Data were collected by observing student activities, learning outcomes tests and filling out student response questionnaires. The results of the percentage of student activity from the first meeting to the third meeting in a row, namely 71%, 84% and 85% showed that the activity of students increased significantly. The percentages of learning outcomes at the first to third meetings were 67.50%, 77.50% and 87.50% which showed an increase and classical mastery achievement. Students showed a positive response to the application of the learning together model on the material in the form of molecules with a percentage of 94.07%. The learning together model can improve students' activities and learning outcomes. Students are enthusiastic in participating in learning using the learning together model and most of them give a positive response.
MENINGKATKAN KETERAMPILAN DASAR MENGAJAR KIMIA MELAUI PEMBELAJARAN BERBASIS BOARD GAME (BGBL) Habiddin Habiddin
Chimica Didactica Acta Vol 1, No 1 (2013)
Publisher : FKIP USK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (258.707 KB)

Abstract

The Course of Basic skills of teaching is provided to train chemistry education students in conducting an efficient and effective learning. These skills include set induction closure lesson skills and explaining skills. In the next globalization of education era, chemistry education students as the future chemistry teachers are expected to have a good skill in teaching in English. In fact, the limitations of their abilities and self-confidence to speak in English cause they did not apply the basic skills of teaching in English properly, especially when they have to explain chemistry concepts with analogies and told the interesting stories related to chemistry. To solve this problem, the design of learning to optimize student opportunities in practicing their speaking skills is the right solution. This learning design is called Board Game-Based Learning (BGBL). BGBL implementation is effective in improving students’ confidences in demonstrating their set induction closure lesson skills and explaining skills in teaching chemistry in English.
THE EFFECT OF USING PhET SIMULATION VIRTUAL LAB ON THE UNDERSTANDING OF THE ACID-BASE CONCEPT (A Case Study at Chemistry Education Department, Syiah Kuala University) Dhea Ulhaq; Latifah Hanum; Habibati Habibati
Chimica Didactica Acta Vol 11, No 1: June 2023
Publisher : FKIP USK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jcd.v11i1.28257

Abstract

The Covid-19 pandemic has introduced numerous limitations to face-to-face learning, prompting a transition to online platforms. Consequently, this study aims to investigate the impact of using the PhET virtual lab on chemistry education students' understanding of the acid-base concept. Employing a quasi-experimental approach with a one-shot case study design, the research selected two classes (an experimental class and a control class) from the 2021 chemistry education cohort using purposive sampling. Data collection involved the use of tests, as multiple-choice questions, and non-test instruments, including questionnaires. The results of the study indicate that the calculated t-value t count of 14.905 surpassed the critical t-value ttable of 2.262 at a significance level of 5 percent (0.05), leading to the rejection of the null hypothesis (Ho) and the acceptance of the alternative hypothesis (Ha). This finding signifies a significant effect of utilizing the PhET virtual lab on chemistry education students' understanding of the acid-base concept. Moreover, students responded positively to the use of the PhET virtual lab, with 41 percent rating it as good and 40 percent rating it as very good.Keywords: PhET Simulation; Virtual Lab; Distance Learning; e-learning; Acid and Base
EFFECT OF SOLVENT AND EXTRACTION TIME VARIATION ON THE COFFEE OIL EXTRACTION RESULTS Marisa Fitria; Rizka Mulyawan; Sulhatun Sulhatun; Agam Muarif; Syamsul Bahri
Chimica Didactica Acta Vol 11, No 1: June 2023
Publisher : FKIP USK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jcd.v11i1.32550

Abstract

The traditional coffee with the greatest taste is called arabica. One of the ingredients made from coffee beans and used for air freshener is coffee oil. The Soxhlet extraction method, a separation technique that is often used to separate one or more compounds from a solid or liquid by adding a solvent, is one of the processes for making coffee oil. This research has been done before, but a comparison of different types of solvents and inclusion of differences in extraction time has not been done. The purpose of this research is to understand how the difference in extraction time and the comparison of solvent types affect the yield, density, and acid number produced. Extraction of hexane and ethanol by distillation for 120 minutes is a research technique. Extraction times were 90, 120, 150 and 180 minutes. In this study, the largest extraction with ethanol solvent was produced within 120 minutes of 25.75%, while the highest percent yield of coffee oil with hexane solvent was obtained within 120 minutes of 17.3%. The maximum specific gravity for 180 minutes with ethanol solvent is 0.94 gr/ml, while for 180 minutes with hexane solvent is 0.91 g/mL. Coffee oil with hexane solvent produced an acid value between 3.2 and 7 mg KOH/g, while coffee oil with ethanol solvent produced an acid value between 4.6 and 11.2 mg KOH/g.
QUALITATIVE AND QUANTITATIVE ANALYSIS OF HYDROQUINONE CONTENT IN MARKETPLACE FACIAL WHITENING CREAMS Zaman Ruchiyat; Nanda Raudhatil Jannah; Ayu Shalihat
Chimica Didactica Acta Vol 11, No 1: June 2023
Publisher : FKIP USK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jcd.v11i1.32162

Abstract

Hydroquinone is one of the dangerous ingredients in facial whitening cream cosmetics which can cause skin irritation, skin redness and a burning feeling. The purpose of this study was to determine the hydroquinone content in facial whitening cream cosmetics sold in the marketplace. The method used in this study was a qualitative test using a colour reagent test and the Thin Layer Chromatography (TLC) method with toluene:glacial acetic acid as the mobile phase (5:5) and Silica Gel254 Plate as the stationary phase. Quantitative analysis used the UV Vis spectrophotometry method at a wavelength of 541 nm. The results of the qualitative test in the TLC test showed that 4 samples tested positive for hydroquinone in samples A, B, D, and E, with a range of Rf values of 0.44, 0.5, 0.52, and 0.5, respectively. The results of the quantitative test showed that 9 samples contained hydroquinone with a sample content range of 0.22 to 3.62 ppm with an LoD value of 0.637 ppm and an LoQ of 2.124 ppm. The results of this study indicate that there are still cosmetics containing hydroquinone, these results are not following the Regulation of Badan Pengawas Obat dan Makanan (BPOM) No. KH. 00.01.43.2503 of 2009 where the use of this hydroquinone ingredient is prohibited for use in facial whitening creams because it can endanger health.Keywords: Analysis, Hydroquinone, TLC, Whitening Cream

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