Chimica Didactica Acta最新文献

THE DEVELOPMENT OF STEM-BASED E-STUDENT WORKSHEETS ON ELECTROLYTE AND NON-ELECTROLYTE SOLUTION MATERIAL TO IMPROVE STUDENT’S LEARNING OUTCOMES 就电解质和非电解质溶液材料开发基于 stem 的电子学生作业单，以提高学生的学习成果

Chimica Didactica Acta Pub Date : 2023-12-29 DOI: 10.24815/jcd.v11i2.33170

Indah Mutiara Insani, M. Zubir

{"title":"THE DEVELOPMENT OF STEM-BASED E-STUDENT WORKSHEETS ON ELECTROLYTE AND NON-ELECTROLYTE SOLUTION MATERIAL TO IMPROVE STUDENT’S LEARNING OUTCOMES","authors":"Indah Mutiara Insani, M. Zubir","doi":"10.24815/jcd.v11i2.33170","DOIUrl":"https://doi.org/10.24815/jcd.v11i2.33170","url":null,"abstract":"The aim of this research is to develop STEM-based E-Student Worksheets, determine the feasibility of STEM-based E-Student Worksheets as assessed by material expert validators, learning experts, and design experts, and describe the effectiveness of STEM-based E-Student Worksheets in improving student learning outcomes in material electrolyte and non-electrolyte solutions. This RD using the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation). Product trials were conducted on a small group of 30 students from a single class. Material experts, three learning experts, three design experts, and pretest and posttest results were used to collect data, which was then analyzed and described. According to the experts' feasibility assessment, three validators material experts, three learning expert validators, and three design expert validators were declared very feasible to use in the learning process with successive average scores: 81.5%, 87.78%, and 85.97% with very feasible criteria and E-Student Worksheets based STEM which is designed to be effective for improving student learning outcomes and can be used in learning, With learning outcomes, an average pretest score of 51.67 and a posttest score of 86.33 were obtained, as well as an average N-Gain of 0.72 with high interpretation and a percentage of completeness of 90%.","PeriodicalId":319170,"journal":{"name":"Chimica Didactica Acta","volume":"105 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139145626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

DEVELOPMENT OF E-MODULE INTEGRATED WITH VIRTUAL LABORATORY ON ACID-BASE TITRATION MATERIAL TO IMPROVE CRITICAL THINKING SKILLS 开发与酸碱滴定材料虚拟实验室相结合的电子模块，提高批判性思维能力

Chimica Didactica Acta Pub Date : 2023-12-29 DOI: 10.24815/jcd.v11i2.33185

Theresia O. Ambarita, M. Situmorang

{"title":"DEVELOPMENT OF E-MODULE INTEGRATED WITH VIRTUAL LABORATORY ON ACID-BASE TITRATION MATERIAL TO IMPROVE CRITICAL THINKING SKILLS","authors":"Theresia O. Ambarita, M. Situmorang","doi":"10.24815/jcd.v11i2.33185","DOIUrl":"https://doi.org/10.24815/jcd.v11i2.33185","url":null,"abstract":"Along with the advancement of science and technology, educators also need to be more innovative in order to improve the learning process, one of which is inventing new learning materials. With the development of information and communication technology, the virtual laboratory as an alternative way to resolve the issue. The aim of this study is to develop an e-module integrated with virtual laboratory on acid base titration material to improve students’ critical thinking skills. The development model used is the ADDIE model which consists of Analysis, Design, Development, Implementation, and Evaluation. The feasibility of the material from the e-module obtained was 81.66% in the category of very valid, and the feasibility of the media was obtained at 87.03% with the very valid category. This states that the e-module integrated with virtual laboratory is feasible to be used as a learning material. There is an effect of using the e-module integrated with virtual laboratory based on the hypothesis test result. The result of critical thinking skills indicators is categorized as very good with the average score of 80.9. The result of the pre-test is categorized as less with the average score of 51 and the post-test is categorized as very good with the average score of 80.143. It can be concluded that the e-module integrated with virtual laboratory can improve students’ critical thinking skills.","PeriodicalId":319170,"journal":{"name":"Chimica Didactica Acta","volume":" 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139145192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

DEVELOPMENT OF HOTS LITERACY BASED COGNITIVE ASSESSMENT TOOLS ON ACID BASE MATERIAL 开发基于热识字的酸碱材料认知评估工具

Chimica Didactica Acta Pub Date : 2023-12-29 DOI: 10.24815/jcd.v11i2.33184

Sakinah Mawaddah Hasibuan, I. Jahro

引用次数: 0

DEVELOPMENT OF HYPERLINK-BASED LEARNING MEDIA TO IMPROVE STUDENT LEARNING OUTCOMES IN ATOM MATERIALS 开发基于超链接的学习媒体，提高学生在原子教材中的学习效果

Chimica Didactica Acta Pub Date : 2023-12-29 DOI: 10.24815/jcd.v11i2.33183

Vina Anastasya Hara Tambun, Marini Damanik

{"title":"DEVELOPMENT OF HYPERLINK-BASED LEARNING MEDIA TO IMPROVE STUDENT LEARNING OUTCOMES IN ATOM MATERIALS","authors":"Vina Anastasya Hara Tambun, Marini Damanik","doi":"10.24815/jcd.v11i2.33183","DOIUrl":"https://doi.org/10.24815/jcd.v11i2.33183","url":null,"abstract":"The development of technology directly requires the world of education to adjust these developments in improving the quality of education to create quality human resources. So that the world of education must be able to utilize technology to create more interesting, comprehensive, and interactive multimedia-based learning media. The purpose of this research and development is to describe the preparation steps and feasibility (validity) of Hyperlink-based PowerPoint learning media to improve student learning outcomes through learning media using the Hyperlink-based PowerPoint learning model which was developed in chemistry learning the development of atomic theory. This research and development produced PowerPoint learning media based on Hyperlink on atomic theory development material which has been declared feasible with the aim of learning media that are interesting and concise but complete for use by students and teachers and improve student learning outcomes. Validity was fulfilled based on the assessment of the validator by material experts and media experts with a feasibility level for media eligibility of 91.3% and material eligibility of 89% so that it is in the very feasible category for media and material. The results of the questionnaire to obtain student responses to the developed Android-based learning media were 80.6%. The results of increasing the value in chemistry learning on the material for the development of atomic theory using PowerPoint learning media based on Hyperlink includes 92.12% of the average student score and is in the very good category which shows that PowerPoint learning media based on Hyperlink on atomic theory development material is suitable for use as a medium learning and to improve student learning outcomes.","PeriodicalId":319170,"journal":{"name":"Chimica Didactica Acta","volume":" 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139142129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

QUALITATIVE AND QUANTITATIVE ANALYSIS OF HYDROQUINONE CONTENT IN MARKETPLACE FACIAL WHITENING CREAMS 市售美白面霜中对苯二酚含量的定性和定量分析

Chimica Didactica Acta Pub Date : 2023-06-27 DOI: 10.24815/jcd.v11i1.32162

Zaman Ruchiyat, N. R. Jannah, Ayu Shalihat

{"title":"QUALITATIVE AND QUANTITATIVE ANALYSIS OF HYDROQUINONE CONTENT IN MARKETPLACE FACIAL WHITENING CREAMS","authors":"Zaman Ruchiyat, N. R. Jannah, Ayu Shalihat","doi":"10.24815/jcd.v11i1.32162","DOIUrl":"https://doi.org/10.24815/jcd.v11i1.32162","url":null,"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","PeriodicalId":319170,"journal":{"name":"Chimica Didactica Acta","volume":"298 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129299619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

EFFECT OF SOLVENT AND EXTRACTION TIME VARIATION ON THE COFFEE OIL EXTRACTION RESULTS 溶剂和提取时间对咖啡油提取效果的影响

Chimica Didactica Acta Pub Date : 2023-06-27 DOI: 10.24815/jcd.v11i1.32550

Marisa Fitria, Rizka Mulyawan, Sulhatun Sulhatun, A. Muarif, S. Bahri

{"title":"EFFECT OF SOLVENT AND EXTRACTION TIME VARIATION ON THE COFFEE OIL EXTRACTION RESULTS","authors":"Marisa Fitria, Rizka Mulyawan, Sulhatun Sulhatun, A. Muarif, S. Bahri","doi":"10.24815/jcd.v11i1.32550","DOIUrl":"https://doi.org/10.24815/jcd.v11i1.32550","url":null,"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.","PeriodicalId":319170,"journal":{"name":"Chimica Didactica Acta","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127184129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

DEVELOPING EDUCATIONAL E-POSTER BASED ON INSTAGRAM FOR THE TOPIC OF CORROSION AFFECTING FACTORS 以腐蚀影响因素为主题，开发基于instagram的教育电子海报

Chimica Didactica Acta Pub Date : 2023-06-27 DOI: 10.24815/jcd.v11i1.28023

Rahma Mardiana, R. Rahmayani, M. Nazar, Sarlivanti Sarlivanti

{"title":"DEVELOPING EDUCATIONAL E-POSTER BASED ON INSTAGRAM FOR THE TOPIC OF CORROSION AFFECTING FACTORS","authors":"Rahma Mardiana, R. Rahmayani, M. Nazar, Sarlivanti Sarlivanti","doi":"10.24815/jcd.v11i1.28023","DOIUrl":"https://doi.org/10.24815/jcd.v11i1.28023","url":null,"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","PeriodicalId":319170,"journal":{"name":"Chimica Didactica Acta","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121367009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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) PhET模拟虚拟实验室对理解酸碱概念的影响(以马来西亚大学化学教育系为例)

Chimica Didactica Acta Pub Date : 2023-06-27 DOI: 10.24815/jcd.v11i1.28257

Dhea Ulhaq, L. Hanum, Habibati Habibati

{"title":"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)","authors":"Dhea Ulhaq, L. Hanum, Habibati Habibati","doi":"10.24815/jcd.v11i1.28257","DOIUrl":"https://doi.org/10.24815/jcd.v11i1.28257","url":null,"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","PeriodicalId":319170,"journal":{"name":"Chimica Didactica Acta","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126564223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

EVALUATION OF CHEMISTRY LEARNING VIDEOS FROM ONLINE LEARNING APPLICATIONS IN INDONESIA 印度尼西亚在线学习应用程序的化学学习视频评价

Chimica Didactica Acta Pub Date : 2023-06-27 DOI: 10.24815/jcd.v11i1.32026

Muhammad Reza, N. Nurdin, N. Naila, Wilda Puspita Sari

{"title":"EVALUATION OF CHEMISTRY LEARNING VIDEOS FROM ONLINE LEARNING APPLICATIONS IN INDONESIA","authors":"Muhammad Reza, N. Nurdin, N. Naila, Wilda Puspita Sari","doi":"10.24815/jcd.v11i1.32026","DOIUrl":"https://doi.org/10.24815/jcd.v11i1.32026","url":null,"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.","PeriodicalId":319170,"journal":{"name":"Chimica Didactica Acta","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131297883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PENGEMBANGAN MEDIA PEMBELAJARAN INTERAKTIF BERBASIS GOOGLE SLIDE PADA MATA PELAJARAN KIMIA SMA KELAS X MATERI STRUKTUR ATOM 基于谷歌的互动学习媒体开发的X级化学课程的原子结构材料

Chimica Didactica Acta Pub Date : 2022-12-31 DOI: 10.24815/jcd.v10i2.27310

Zulfadli Zulfadli, Kana Puspita, S. Sulastri

引用次数: 0