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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 5 Documents
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Search results for , issue "Vol 11, No 1: June 2023" : 5 Documents clear
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
EVALUATION OF CHEMISTRY LEARNING VIDEOS FROM ONLINE LEARNING APPLICATIONS IN INDONESIA Muhammad Reza; Nurmalahayati Nurdin; Naila Naila; Wilda Puspita Sari
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.v11i1.32026

Abstract

E-learning is not distinct from the use of technology, which includes a variety of digital platforms. Zenius, Ruangguru, Pahamify, and other online learning systems are currently available in Indonesia. There are various learning films on the learning platform, such as on the applications B and C, which both give a variety of features and materials that complement the curriculum K-13, particularly in chemistry. The qualitative descriptive methodologies were used in this investigation. The purpose of this research is to compare the quality of chemistry learning resources available on online learning applications that correspond to the 2013 curriculum. Data is gathered through the downloading and video monitoring of chemical compounds. Two learning apps, B and C, were utilized as examples. According to the findings of this study, application B has a bigger number of videos in the material than application C. In addition, the average video time on the B app is less topical than on the C app. A good learning video has an appropriate length. When the video is too long, the spectator becomes bored. The video's attributes should be clear, and a pleasant appearance, such as animation, can encourage students to follow.
DEVELOPING EDUCATIONAL E-POSTER BASED ON INSTAGRAM FOR THE TOPIC OF CORROSION AFFECTING FACTORS Rahma Mardiana; Ratu Fazlia Inda Rahmayani; Muhammad Nazar; Sarlivanti Sarlivanti
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.v11i1.28023

Abstract

The development of more sophisticated technology has become a powerful tool for achieving more effective and efficient educational objectives. In this instance, learning media that employ social media has been extensively adopted, and one of the potential alternatives is to utilize social media as learning media. This study aims to develop an e-poster social media Instagram on the material factors that affect corrosion and see the response of Chemical Education students of FKIP USK to the developed media. Using the ADDIE approach, RD (Research and Development) is the sort of research used. Student requirements surveys, an evaluation of the viability of the e-poster medium, and student response questionnaires were used to gather data. This research was carried out on the campus of the Faculty of Teacher Training and Education, Syiah Kuala University, Department of Chemistry Education, with research subjects being students majoring in Chemistry Education Force 2020 FKIP Syiah Kuala University consists of 3 class units with a total of 61 students consisting of 57 female and four male. The results showed that With an average percentage of 89 percent, the generated e-poster learning material meets the requirements for "very viable." With an average score of 84 percent, student reactions to the generated medium met the criterion for "extremely feasible." Based on the study's findings, the e-poster is a viable alternative learning medium.Keywords: Development; Learning Media; Instagram; E-Poster; Corrosion

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