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Identification of Student Misconception using a Three-tier Diagnostic Test on Colloid Ratman Ratman; Nurafni Nurafni; Kasmudin Mustapa; Minarni R. Jura; Nurida Nurida; Nurasiah Nurasiah
Jurnal Akademika Kimia Vol. 11 No. 2 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2022.v11.i2.pp129-133

Abstract

This study aims to identify the percentage of misconceptions that occur in students on colloid material in class XI MIPA 2 SMA Negeri 1 Dampal Selatan Kabupaten Tolitoli is based on the results of a three-level diagnostic test and shows which subconcepts have the highest and lowest conceptions. The instrument used in this study was a three-level multiple choice diagnostic test. The results showed students' misconceptions about colloid material in class XI MIPA 2, which was 65.51%. The results of this study indicate that the level of students' misconceptions about colloidal material is a high category.
The Influence of Problem-Based Learning Model Learning Assisted by Science Media Kits on Student Learning Outcomes in Hydrocarbons Ulfiana Ulfiana; Minarni R. Jura; Tahril Tahril
Jurnal Akademika Kimia Vol. 11 No. 2 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2022.v11.i2.pp105-110

Abstract

This study aimed to determine the effect of the problem-based learning model assisted by KIT IPA media on student learning outcomes in hydrocarbon material in class XI IPA SMA N 6 Palu. The type of research used was Pre-experiment with Alternative Treatment design, Post-Test-Only with nonequivalent Groups Design. Sampling was done using the purposive sampling technique with samples consisting of class XI IPA 4 as experimental class I and class XI IPA 2 as experimental class II. The research instruments were the learning outcomes tests, RPP, and observation sheets previously validated in theory and empirically. Testing student learning outcomes used t-test analysis two (two parties) with a prerequisite test: normality and homogeneity tests, then the t-test hypothesis test (two parties) was applied. Based on the research results and analysis of the research data, the value of student learning outcomes in the post-test of the experimental class I was 65.7 and for the exploratory class II was 59.9, while the standard deviation was 10.4 and 9.7, respectively. The results of the statistical testing of hypothesis testing obtained tcount> ttable or 2.60> 1.70 so that H1 was accepted. It means that the learning model of problem-based learning instruction assisted by KIT IPA media affects the learning outcomes of students of SMA Negeri 6 Palu.
IDENTIFIKASI MISKONSEPSI SISWA PADA MASA PANDEMI COVID-19 MENGGUNAKAN TES DIAGNOSTIK THREE-TIER PADA MATERI LARUTAN PENYANGGA KELAS XI SMA NEGERI 3 POSO DI KABUPATEN POSO Tri Ulandari Astaring; Minarni Rama Jura; Kasmudin Mustapa; Paulus Hengky Abram
JURNAL BANUA OGE TADULAKO Vol 1 No 2 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (213.102 KB) | DOI: 10.22487/jbot.v2i1.2007

Abstract

Tri Ulandari, 2020. "Identification of student misconceptions during the Covid-19 pandemic using a three-tier diagnostic test on material for class XI at SMA Negeri 3 Poso in Poso district". Thesis, Chemistry Education Study Program, Department of Mathematics and Natural Sciences Education, Faculty of Teacher Training and Education, Tadulako University, Supervisor: Minarni Rama Jura. this study aims to determine the level of misconceptions in class XI students of SMA Negeri 3 Poso using a quantitative descriptive approach to the buffer solution material during the covid-19 pandemic. The subject of this research consisted of 36 students. The sampling technique was simple random sampling. The research instrument used was a three-tier multiple choice diagnostic test (Three-tier) with a total of 10 questions. Based on the results of research and data analysis showed that the percentage of understanding concepts as much as 23.33%, students' misconceptions as much as 42.78%, and not understanding concepts as much as 33.89%. Based on the results of the percentage of students who experienced misconceptions (False Positive) as many as 11.39%, misconceptions (False Negative) as many as 11.11%, misconceptions as much as 20.28%. Misconceptions still occur in each indicator in the buffer solution material, where the highest misconception is in item number 8 with an indicator for determining the characteristics of a buffer solution in an acid or alkaline state with a percentage of 50%, item numbers 9 and 10 with an indicator explaining how to make a solution. buffer with each percentage of 47.22%. The lack of students' understanding of the buffer solution material is the main factor causing misconceptions, coupled with the pandemic situation which requires students to study more independently, causing limited communication between teachers and students. Thus, the results in the category of misconceptions of SMA Negeri 3 Poso students are in the medium category. The results of this study are expected to be a source of information as well as a motivation and reference for teachers and students to be able to understand chemistry better so as to minimize the occurrence of misconceptions in students.
Differences in Learning Outcomes of Chemistry through Cooperative Learning Model Type Make a Match and Numbered Head Together on the Material of Electrolyte and Nonelectrolyte Solution of Students Class X in SMA Negeri 9 Palu Nur Qamariya; Minarni R. Jura; Afadil Afadil
Jurnal Akademika Kimia Vol. 8 No. 3 (2019)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2019.v8.i3.pp135-140

Abstract

Application of learning model is expected to build good communication between students with teachers and students with students in an effort to improve understanding of a concept. This study aimed to determine the differences in the learning outcomes of chemistry through cooperative learning model type make a match and numbered head together in the material of electrolyte and nonelectrolyte solution of students class X SMA Negeri 9 Palu. This type of research was pre-experimental with the static group pretest-posttest design. The sample used in this research was the students of class Xa (n = 23) as the first experiment 1 and students of class Xb (n = 23) as the second experiment 2 with. The result of data analysis obtained, the mean value of the experiment class 1 was 74.24 and in the experiment class 2 was 67.28. The result of hypothesis testing with t-test statistic on two side was obtained - ttable ≤ tcount ³ + ttable that was (-1.68 <3.27> +1.68 with significant level (α = 0.05) and degrees of freedom = 44. This indicates that H0 was rejected and Ha was accepted so that it can be concluded that there are differences in the students’ learning outcomes of chemistry through cooperative learning model type make a match and numbered head together in the material of electrolyte and nonelectrolyte solution of class X SMA Negeri 9 Palu.
Application of Cooperative Learning Model Type Teams Games Tournament (TGT) with Demonstration Based to Improve the Learning Outcomes of Colloid Topic in Student Class XI SMA Negeri 7 Palu Nur Intan; Minarni R. Jura; Ijirana Ijirana
Jurnal Akademika Kimia Vol. 8 No. 3 (2019)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2019.v8.i3.pp141-146

Abstract

This study aimed to obtain a description of implementation on student’s learning outcomes the application of cooperative learning model of TGT based on demonstration Class XI on colloid material in SMA Negeri 7 Palu. The type of research used in this research was pre-experimental designs (non-designs) with research design that was one-group pre-test post-test design. Sampling in this study was chosen by purposive sampling. The sample consisted of two classes, class XI IPA 1 as experimental class 1 (n = 28) and class XI IPA 2 as experiment class 2 (n = 29). Student learning outcomes were processed using inferential statistical analysis of the Wilcoxon Rank-Unparpulated Ranking nonparametric test. The results showed that the experimental class 1 was Zcount (-4.62) <Ztable (-1.96) and experiment 2 was Zcount (-4.70) <Ztable (-1.96). The effectiveness of the implementation of learning model of TGT based on demonstration to words student learning outcomes can also be seen from the assessment of student learning outcomes with the average posttest score for experimental class 1 was 83.29 and experiment class 2 was 80.86 with the result of N-gain calculation for both experiment class included in high category that was equal to 0.83 and 0.85. So it can be concluded that the implementation of learning model of TGT based on demonstration can improve student learning outcomes with average greater than 75 on colloid material in SMA 7 Palu.
The Differences in Chemistry Learning Outcomes using Cooperative Learning Model Type Numbered Head Together with Think Pair Share on the Material of Atomic Structure and Periodic Table in Class XI SMAN 9 Yunita Rosida; Sri M. Sabang; Minarni R. Jura
Jurnal Akademika Kimia Vol. 8 No. 3 (2019)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2019.v8.i3.pp173-179

Abstract

This study aimed to determine the differences in the chemistry learning outcomes using cooperative learning model type Numbered Head Together with Think-Pair-Share on the material of atomic structure and periodic table in class XI SMAN 9 Palu. This type of research was a quasi-experimental research with the nonrandomized pretest-posttest design. The population in this research was 44 students of class XI IPA in SMA Negeri 9 Palu who registered in the academic year 2017/2018.  The sampling technique used was saturated sampling. The sample in this study were 22 students of class XI IPA 1 as experimental class 1 and 22 students of class XI IPA 2 as experimental class 2. The data of the research were analyzed using a one-party t-test statistic with the prerequisite test, normality test, and homogeneity. The result of data analysis obtained,  X̅1 value of chemistry learning on the students of experimental class 1 was 79.86 (SD = 7.15) whereas in the experimental class 2 students X̅2 value was 73.95 (SD = 8.26). The result of hypothesis testing was obtained t > t1 – α was 2,55 > 1.68 with a significant level (α = 0.05) and degrees of freedom = 42. This showed that Ho was rejected and Ha was accepted so that it can be concluded that there were differences in the results of chemistry learning outcomes using cooperative learning model type Numbered Head Together with Think-Pair-Share on the material of the atomic structure and the periodic table.
Analysis of Cyanide Acid Content in Cassava (Manihot esculenta) Based on Storage Time Ria Lumbantobing; Mery Napitupulu; Minarni R. Jura
Jurnal Akademika Kimia Vol. 8 No. 3 (2019)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2019.v8.i3.pp180-183

Abstract

Cassava is a tuber of cassava plants which is a source of carbohydrates that can be consumed as food and as snack foods such as chips. However, cassava and the leaves contain cyanide acid (HCN) which is dangerous for the human when consumed in excess. Cyanide acid reduction can be done by washing as well as immersion because of its volatile nature. The aim of this research is to investigate the difference of cyanide acid (HCN) content on peeled and unpeeled cassava with the variation of storage time 0, 2, 4, 6, and 8 days. A preliminary test was done to know the existence of cyanide acid (HCN) in cassava. Method analysis of cassava was titrated with the NH4CNS solution using the argentometric principle of the Volhard method. The results showed that cyanide acid (HCN) content in peeled cassava was higher than unpeeled cassava which was 3.9, 4.7, 5.2, 5.6, and 6.0% respectively for shelled cassava and 3.9, 4.6, 5.1, 5.5, and 5.9% respectively for unpeeled cassava.
The Implementation of Mind Mapping on Chemical Bond Learning Assisted by Information Technology towards the Students’ Learning Outcomes in Class X MIA 1 at SMA Negeri 1 Sindue Awanda Awanda; Tahril Tahril; Minarni R. Jura
Jurnal Akademika Kimia Vol. 9 No. 3 (2020)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2020.v9.i3.pp172-175

Abstract

This study aimed to determine the influence of the implementation of mind mapping on learning of chemical bonding assisted with information technology toward learning outcomes of students in the Class X1 Science at SMA 1 Sindue. This study was a quasi-experiment with non-randomized pretest-posttest control group design. Sampling was based on special consideration (purposive sampling) with a sample of students of class X1 Science as the experimental class and class X2 Science as the control class. The instrument of this study was a test of learning outcomes. Data of the results was tested using statistical analysis of one-party t-test with prerequisite tests of normality and homogeneity tests. The data analysis obtained an average score of learning outcomes in the experimental class was 77.12 and in the control class was 67.6. Based on the hypothesis test with the t-test statistic of two parties obtained tcount of 10.89 and ttable of 1.95 at α 0.05. In this case, H1 was accepted and H0 was rejected because tcount was in the area of ​​ H0 rejection. This showed that there were differences in students’ learning outcomes through the implementation of mind mapping and conventional in learning of students in 10th grade at SMA 1 Sindue.
Determination of Total Flavonoid Contents and Antioxidant Activity of Leucaena Leucocephala Leaves's Extract Taupik Hidayat; Baharuddin Hamzah; Minarni R. Jura
Jurnal Akademika Kimia Vol. 9 No. 2 (2020)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2020.v9.i2.pp70-77

Abstract

The study of the determination of total flavonoid contents and antioxidant activity of extract of Leucaena leucocephala leaves had been carried out using UV-Vis spectrophotometry method. This study aimed to determine the total flavonoid contents and the antioxidant power of Leucaena leucocephala extract. Extraction of chemical content from Leucaena leucocephala was carried out by the maceration method using absolute ethanol. The total flavonoid contents from the sample extract were taken up for absorption at wavelength 510 nm and 700 nm. The variation of the concentration of Leucaena leucocephala leaves' extract was respectively 20, 40, 60, and 80 ppm. The results of the study showed that the total flavonoid contents of extracts of Leucaena leucocephala leaves was 2.242 g/100 grams. The antioxidant activity of Leucaena leucocephala leaves extract was carried out using DPPH (1,1-diphenyl-2-picrylhydrazine) and the measurement of absorption was at a wavelength of 517 nm, and by varying the sample concentration. Positive control used was vitamin C solution with the same variation of extract's concentration. The results showed that the IC50 values of Leucaena leucocephala leaves extract and vitamin C were 175.388 and 28.907 ppm. Based on the IC50 data it can be stated that the antioxidant vitamin C was stronger than the Leucaena leucocephala leaves extract which was classified as a weak type of natural antioxidant.
Analysis of Flavonoid Levels in Extract of Gambas Fruit (Luffa acutangula L) Originating from the Village of Posona District Parigi Moutong Aharudin Aharudin; Kasmudin Mustapa; Minarni R. Jura
Jurnal Akademika Kimia Vol. 9 No. 2 (2020)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2020.v9.i2.pp102-106

Abstract

Gambas fruit (Luffa acutangula L) is a cultivable plant. Gambas fruit can be used as an alternative free radical antidote. The purpose of this study was to determine the level of flavonoids in extract of gambas fruit (Luffa acutangula L) originated from Posona village of Parigi Moutong Regency. This research uses UV-Vis spectrofotometry analysis method. Flavonoids test was done by extracting the sample using 1% HCl solvent in ethanol. The result of the experiment showed that flavonoid level on the fruit of gambas (Luffa acutangula L.) was young gambas 10.60 mg/100g and old gambas 2.62 mg/100g.
Co-Authors Afadil Agustin Tiwow Aharudin Aharudin Ahmad Idris Alfinda D. Nande Andriana Andriana Awanda Awanda Baharuddin Hamzah Dahlia Sofiyatun Hikmah Hasan Basri Ijirana Irwan Said karmila karmila Kasmudin Mustapa Mery Napitupulu Mestawaty Mestawaty Moh. Husaini Nur Intan Nur Qamariya Nurafni Nurafni Nurasiah Nurasiah Nurdin Rahman Nurhikmah Nurhikmah Nurida Nurida Patangari, Intan Y. Paulus Hengky Abram Ratman Ratman Ratman Ratman Ria Lumbantobing Rihanah Rihanah Setiawan, Topan Sitti Aminah Sri M. Sabang Sri M. Sabang Sri Mulyani Sabang Sulaeha, Siti Supriadi Supriadi Tahril Taupik Hidayat Tri Ulandari Astaring Ulfiana Ulfiana Wayan N. Sugiani Yunita Rosida