cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Daud K. Walanda
Contact Email
jak.untad@gmail.com
Phone
+62813441377264
Journal Mail Official
jak.untad@gmail.com
Editorial Address
Jl. Soekarno Hatta Km 9, Palu - Indonesia 94119
Location
Kota palu,
Sulawesi tengah
INDONESIA
Jurnal Akademika Kimia
Published by Universitas Tadulako
ISSN : 24775185     EISSN : 23026030     DOI : -
Core Subject : Science, Education,
Chemistry Education
Jurnal Akademika Kimia is an electronic open-access journal that aims to publish the latest research results in the area of chemistry education and pure chemistry from academicians, professionals, and other practitioners at all levels of chemistry education. The journal coverage includes the following: current trends of professional chemistry education, educational technology, teacher education, educational science, learning assessment, learning models and development of learning materials, as well as pure chemistry including organic chemistry, inorganic chemistry, analytical chemistry, physical chemistry, biochemistry and other chemistry fields such as environmental chemistry, that emphasis on a broad description of the general methods and processes for the synthesis, modification, and characterization of chemical materials.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 10 Documents
 1 
Search results for , issue "Vol. 12 No. 4 (2023)" : 10 Documents clear
Improving Student Learning Outcomes by Applying the Discovery Learning Model to the Acid-Base Titration Material of Senior High School Patilima, Yunarti; Nuryanti , Siti
Jurnal Akademika Kimia Vol. 12 No. 4 (2023)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2023.v12.i4.pp205-209

Abstract

The acid-base titration topic has links between concepts, equations of reactions, and calculations. Therefore, the lack of mastery related to this topic will affect the low learning outcomes. This study aimed to improve student learning outcomes on the acid-base titration topic by applying the discovery learning model. The sample of this study was students of class XI MIPA SMA Negeri 5 Palu, consisting of class XI MIPA 5 as experimental class 1 (n = 35) and class XI MIPA 6 as experimental class 2 (n = 33). The effectiveness of applying the discovery learning model can be seen from the average N-gain value in the experimental class. For experimental class 1, the average N-gain value was 0.67, which is included in the medium category. While the experimental class 2 was 0.63, which is included in the medium category. Based on the results of data analysis, the average value of student learning outcomes for experimental class 1 was 76.42 and experimental class 2 was 75.3. This value was greater than the average student learning outcomes before the treatment, which were 65. So it can be concluded that applying the discovery learning model can improve students’ learning outcomes in class XI MIPA on acid-base titration topics in SMA Negeri 5 Palu.
Analysis of Learning Difficulties of Students Class XI in Chemistry Subjects Hikma, Hikma; Suherman, Suherman
Jurnal Akademika Kimia Vol. 12 No. 4 (2023)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2023.v12.i4.pp210-215

Abstract

This study aimed to determine (1) the internal factors that cause learning difficulties in chemistry subjects for students of class XI MIA SMA Negeri 1 Tinombo Selatan, including attitudes towards learning, motivation, interest, and health; (2) the external factors that cause learning difficulties for class XI students of SMA Negeri 1 Tinombo Selatan include family, school, and community environment. This research was descriptive. The research subjects were 92 students. The collection technique used a questionnaire on the factors of learning difficulties. The data analysis technique used was descriptive with a percentage. The results showed that (1) the internal factors that caused learning difficulties were as follows: the attitude indicator towards learning was 16.44 %, the motivation indicator was 13.45 %, the interest indicator was 18.26 %, and the health indicator was 18.88 %. (2) External factors that cause learning difficulties are the family indicator was 23.23 %, the school indicator was 87.77 %, while the community indicator was 25.16 %.
Analysis of the Critical Thinking Skills of Students in Senior High School in Solving the Reaction Rate Problem Ramadhan , Moh. R.; Ijirana, Ijirana
Jurnal Akademika Kimia Vol. 12 No. 4 (2023)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2023.v12.i4.pp216-220

Abstract

This study aimed to obtain a description of the critical thinking skills of SMA Negeri 3 Palu students in solving reaction rate problems. The type of research used is descriptive-quantitative, with the research design in the form of case studies. The research sample consisted of students of class XI IPA 1 to XI IPA 4 SMA Negeri 3 Palu, with 108 students. The research instrument used is a critical thinking skill test in the form of 6 questions, validated with a value obtained for expert validation of 3.72 and an average empirical validation value of 0.72. Data analysis is done by calculating the grades students get for each indicator of critical thinking skills, then grouping them by essential categories of thinking. According to Ennis, the indicators of critical thinking skills used in this study are to provide simple explanations, build basic skills, draw conclusions, provide further explanations, and set strategies and tactics. Based on the results of the research data analysis, the highest percentage of critical thinking skills for the five indicators used in a row, namely 37.04, 51.85, 61.11, 53.70, and 42.59 %. These results show that each student has different critical thinking skills. The percentage obtained is, on average, in the medium to high category. The results of this study show that the essential thinking skills of high school students of SMA Negeri 3 Palu, grade XI IPA, are in a good category.
Application of Think-Pair-Share (TPS) Cooperative Learning Model to Student Learning Outcomes in Hydrocarbon Material in Senior High School Kifli, Moh.; Mustapa, Kasmudin; Ratman, Ratman
Jurnal Akademika Kimia Vol. 12 No. 4 (2023)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2023.v12.i4.pp221-225

Abstract

This study aims to describe the improvement of student learning outcomes by applying the Think-Pair-Share (TPS) cooperative learning model on hydrocarbon material in class XI SMA Negeri 2 Sigi. This study's research type is pre-experimental with a one-group pretest posttest design. This study utilized purposive sampling. The sample consisted of two classes: class XI IPA 3 as the experimental class 1 (n = 22) and class XI IPA 4 as the experimental class 2 (n = 24). Student learning outcomes data are processed using the learning improvement test (N-gain). The application of the Think Pair Share (TPS) cooperative learning model to improve student learning outcomes on Hydrocarbons can be seen from the average N-gain value in the two experimental classes, including in the high category, namely 0.77 and 0.78. Therefore, applying the Think Pair Share (TPS) cooperative learning model can improve student learning outcomes on average greater than 75 (KKM) of SMA Negeri 2 Sigi students in Class XI on hydrocarbon material.
Analysis Of Flavonoid Levels on Skin Langsat Fruit (Lansium Domesticum) Using Uv-Vis Spectrophotometer Almarza, Almarza; Said, Irwan
Jurnal Akademika Kimia Vol. 12 No. 4 (2023)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2023.v12.i4.pp226-229

Abstract

Langsat fruit (lansium domesticum) is a plant included in the family meliaceace. Several compounds were reported to have been isolated from multiple constituents in langsat plants that contain lansic acid, triterpene amino sugar glycoside, and dukunolides A- C, tetranortripenoid was dukunolides D- F. With the development of sciense a lot of research on ingredients and benefits langsat fruit both the pulp of the fruit and the skin. Empirically, the skin of the langsat fruit has been used as an anti-oxidant and anti-cancer treatment. Langsat fruit skin is an essential source of bioactive components such as phenols, flavonoids, tannins, saponins, triterpenoids, and alkaloids. This study used a UV-Vis spectrophotometer to determine the levels of flavonoids in the ethanol extract of langsat fruit peel (Lansium domesticum). This study aims to determine the levels of flavonoids in the skin of langsat fruit (lancium domesticum) by comparing the wet and dry fruit skin. Extraction of the chemical content of langsat fruit skin (Lansium domesticum) was carried out by the meseration method using ethanol 70.0/0. The determination of flavonoid levels in langsat fruit peel extract was measured at 520 nm and 700 nm from the result of the study. The total flavonoid levels of each sample were 2.856 mg /100 grams of alkaline fruit skin and 4.209mg /100 grams of dried langsat fruit peel. This shows that dried langsat fruit peel samples have high anti-oxidant power and alkaline fruit peel extracts.
Analysis of the Characteristics of Chemical Compounds in Palm Flour (Arenga pinnata) from the Poso District Poima , Deswita K.; Abraham, Paulus H.
Jurnal Akademika Kimia Vol. 12 No. 4 (2023)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2023.v12.i4.pp230-233

Abstract

Aren (Arenga pinnata) is a palm family with the potential to develop high economic value in tropical regions such as Indonesia. This study aims to determine the levels of each chemical compound contained in palm flour (protein, fat, carbohydrate, potassium, and calcium levels). Determination of protein, fat, and carbohydrate levels in this study using a UV - VIS spectrophotometry tool. Determination of potassium (K) and calcium (Ca) levels using a flame photometer. The results showed that the analysis of protein content obtained 1.5765 %, fat content obtained 1.465 %, and carbohydrate content obtained 55.88 %. The analysis of potassium content obtained 1.76 %, and calcium levels obtained 1.495 %. The results of this study are expected to be foodstuffs that can be processed into food to meet the needs of protein, carbohydrates, fat, potassium, and calcium in the body.
Analysis of Primary Metabolic Compounds in Durian Seed Flour (Durio zibethinus Murr) Typical of Central Sulawesi (Parigi Moutong) Nurhalisa, Nurhalisa; Said, Irwan; Sakung, Jamaluddin M.; Jura, Minarni R.
Jurnal Akademika Kimia Vol. 12 No. 4 (2023)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2023.v12.i4.pp234-237

Abstract

This study aims to determine the carbohydrate, protein, and fat content of durian (Durio zibethinus Murr) seeds from Parigi Moutong. This study consisted of two samples, namely, sample A (crushed durian seeds) and sample B (mashed and sifted durian seeds)—Soxhlet method. The results obtained in sample A for carbohydrate content of 52.8 %, protein 3.50 % and fat 2.06 % while in sample B for carbohydrate content of 43.2 %, protein 2.27 % and fat 2.25 %. Based on the results obtained, durian seed flour can be used as processed food and can be of economic value if it is further processed and traded.
Biofoam from The Waste of Durian Seeds and Corn Cobs Mabela, Megawati K.; Sabang, Sri M.
Jurnal Akademika Kimia Vol. 12 No. 4 (2023)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2023.v12.i4.pp238-241

Abstract

Biofoam is a styrofoam substitute packaging made with starch and fiber as the basic ingredients. This study aims to determine the characteristics (biodegradation test, pressure strength and water absorption) of biofoam produced from durian seed waste and corn cobs. The best treatment in this study was biofoam made using a mixture of durian seeds starch and corn cobs fiber made with 5 % NaOH concentration, where the results obtained were the water absorption test values with 1 minute, 2 minutes, and 3 minutes, namely 11.20 %, 14.22 % and 16.81 %. While the compressive strength test value obtained is 16.85 10-5 Pa, and the results of the biodegradation test are obtained at 35.42 % within 14 days of burial in the soil. The FTIR test results showed that the biofoam groups produced from a mixture of corn cob fibers with different concentrations of NaOH still showed similarities in their functional groups, where none gave rise to new peaks. The functional group content of the resulting biofoam includes the CH group (alkane) and the C. C Group (alkyne) C=C group (aromatic ring and OH group.
Coagulant Capacity of Moringa (Moringa Oleifera) Seed on NaCl Solution Sibulo, Vanesa; Abram, Paulus H.
Jurnal Akademika Kimia Vol. 12 No. 4 (2023)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2023.v12.i4.pp2242-246

Abstract

Moringa seeds are one of the natural coagulant ingredients that contain protein and carbohydrates that can be used in water purification, especially in reducing turbidity. This study aims to determine the level of NaCl coagulated by Moringa seed powder. The capacity or coagulation ability of Moringa seed powder is measured by the percentage of NaCl in the solution coagulated by Moringa seed powder. To achieve this purpose, several experiments have been used, namely variations in the concentration of NaCl as samples including; 0.5 %, 1 %, 3%, and 5% with treatment using Moringa seed powder as much as 1 g, 3 g and 5 g—determination of NaCl content using Flame Photometers BWB Technologies. The results of this study indicate that the optimum level of NaCl coagulated by Moringa seed powder is 3 %. The concentration can increase the effectiveness of reducing NaCl levels by obtaining a coagulated percentage value of 95.30 %.
Effectiveness of Purification Used Cooking Oil Using Adsorbents: Activated Charcoal Seeds Salak (Salacca zalacca) Sufia, Sufia; Santoso, Tri; Aminah, Sitti; Rahmawati, Sitti
Jurnal Akademika Kimia Vol. 12 No. 4 (2023)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2023.v12.i4.pp247-253

Abstract

Salak seeds have a reasonably high cellulose content. This suggests that salak seeds can be used as a raw material for producing activated charcoal to refine used cooking oil. This study aims to determine the effectiveness of refining used cooking oil using active charcoal adsorbents derived from Salacca zalacca seeds. The methods used to determine free fatty acid levels and peroxide values are the acid-base and iodometric titration methods. This study will observe several variables that affect the adsorption process, namely the mass of activated charcoal and the contact time of used cooking oil. The results showed a decrease in free fatty acids and peroxide number, and the colour of the oil became brighter with increasing adsorbent and contact time. The best results were obtained at a mass of 15 grams and an adsorption time of 120 minutes. Based on the quality requirements for cooking oil as specified in SNI 3741-1995.

Page 1 of 1 | Total Record : 10

 1 

Filter by Year

2023 2023


Reset
Filter By Issues
All Issue Vol. 14 No. 3 (2025) Vol. 14 No. 2 (2025) Vol. 14 No. 1 (2025) Vol. 13 No. 1 (2024) Vol. 12 No. 4 (2023) Vol. 12 No. 3 (2023) Vol. 12 No. 2 (2023) Vol. 12 No. 1 (2023) Vol. 11 No. 4 (2022) Vol. 11 No. 3 (2022) Vol. 11 No. 2 (2022) Vol. 11 No. 1 (2022) Vol. 10 No. 4 (2021) Vol. 10 No. 3 (2021) Vol. 10 No. 2 (2021) Vol. 10 No. 1 (2021) Vol. 9 No. 4 (2020) Vol. 9 No. 3 (2020) Vol. 9 No. 2 (2020) Vol. 9 No. 1 (2020) Vol. 8 No. 4 (2019) Vol. 8 No. 3 (2019) More Issue