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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 10 Documents
 1 
Search results for , issue "Vol 1, No 1 (2013)" : 10 Documents clear
HUBUNGAN KEMAMPUAN BERPIKIR FORMAL PESERTA OLIMPIADE KIMIA DENGAN KEMAMPUAN MENYELESAIKAN SOAL OLIMPIADE KIMIA TINGKAT LOKAL DAN INTERNASIONAL Said Ali Akbar
Chimica Didactica Acta Vol 1, No 1 (2013)
Publisher : FKIP USK

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Abstract

This research aimed to determine the relationship the relationship formal thinking skills of chemistry olympiad participants with problem solving skills the chemistry olympiad questions. The hypothesis in this research that there is a the relationship formal thinking skills of chemistry olympiad participants with problem solving skills the chemistry olympiad questions. The study population was all students from high school or MAN in Banda Aceh and Aceh Besar district participating in the Olympiad. The Sampling used purposive sampling, is the sample members selected by objective research. This research is a qualitative survey using a quantitative approach. The method used in this study is descriptive. The data was collected using a test instrument. In addition, interviews were also used as supporting data in the study. Processing quantitative data used Spearman rank correlation coefficient, while qualitative in percentage form. The results of the analysis obtained rs value about 0,94. Check the table of values r product moment with df of 14, at a significance level of 5% is obtained r table = 0,532, whereas the significance level of 1% is obtained r = 0,661 table. rs value is greater than the price r table, both at significance level of 5% (0,94 0,532), as well as the significant level of 1% (0,94 0,661). Thus, the alternative hypothesis (Ha) is accepted it means there is a strong positive correlation between the variables X and Y. Therefore, it can be concluded that the ability of formal influence Olympiad participants in solving problems.
KESTABILAN ZAT WARNA ALAMI DARI UMBI KETELA UNGU (Ipomoea batatas) Ibnu Khaldun
Chimica Didactica Acta Vol 1, No 1 (2013)
Publisher : FKIP USK

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Abstract

Researcher has conducted a study on the stability of natural pigments which is derived from sweet potato (Ipomea batatas). The aim of this study was to determine the stability of natural pigments from sweet potato of the variation of heating temperature, long warm-up, long storage and long exposure to sunlight. The populations of this study those fresh sweet potatoes ibaraki varieties as much as 2 kg. The samples used in this study were 100 grams of sweet potatos that have been peeled and grated, then be extracted with 20 mL of distilled water at a temperature of 50 0C and blended so that it became a slurry and then squeezed, then do the identification of anthocyanin compounds in the sample. The extract of sweet potato at pH 6 measured the wavelength of maximum, then anthocyanin concentration was calculated using the pH-differential method. Further, it was tested the stability of the dye to the variation of heating temperature, long warm-up, long storage and long exposure to sunlight at a wavelength of maximum. The results showed that at pH 6 sweet potatos have a wavelength of 536 nm and concentraining anthocyanin with 10,02 mgL-1 of concentrations. Stability of the dye from sweet potatos extracts to heating temperature variation decreased absorbance values by an average of 0,004, a decreased of the heating value of the average absorbance of 0,008 and of storage duration decreased the absorbance values by an average of 0,007. Whereas long exposure to sunlight absorbance values increased by an average of 0,009. The conclution of the researche is the intensity of sweet potatoes extract color was reduced to the variation of heating temperature, heating time and saving time. The intensity of yam’s extract color increased to along exposure of sunlight.
SYNTHESIS OF 1,4-BENZODIAZEPINE THROUGH PHOTOCHEMICAL REACTION OF 3-PHENYL-3,6-DIHYDRO-[1,2]DIOXINE WITH ETHYLENDIAMINE Muhammad Nazar
Chimica Didactica Acta Vol 1, No 1 (2013)
Publisher : FKIP USK

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Abstract

Synthesis of 1,4-Benzodiazepine via reaction of ethylendiamine with 3-phenyl-1,2-dioxine has been carried out. The first step of this experiment was conversion of triphenyl phosphine to triphenyl metyl phosphine iodide which was then used to form phenyl butadiene from cinnamaldehyde. The synthesis of phenyl dioxine was done via photochemical reaction of phenyl butadiene with oxygen gas in the presence of tetraphenyl posphene. The coupling reaction between phenyl phosphine and ethylendiamine was carried out under atmospheric pressure at room temperature. All steps of these reactions were confirmed using TLC with appropriate eluents and the resulting compounds were purified using column chromatography. In addition, all products structure including phenyl dioxine and 1,4-benzodiazepine were determined using HNMR.
PENERAPAN PENDEKATAN SAINS TEKNOLOGI MASYARAKAT (STM) PADA MATERI KOLOID DI MAN KUTA BARO ACEH BESAR Zarlaida Fitri
Chimica Didactica Acta Vol 1, No 1 (2013)
Publisher : FKIP USK

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Abstract

Telah dilaksanakan penelitian tentang ”Penerapan Pendekatan Sains Teknologi Masyarakat (STM) pada materi Koloid di MAN Kuta Baro Aceh Besar Tahun Ajaran 2011/2012”. Penelitian ini bertujuan untuk mengetahui aktivitas siswa, hasil belajar dan tanggapan siswa terhadap pendekatan STM. Jenis penelitian ini yaitu deskriptif kualitatif dengan subjek penelitian yaitu siswa kelas XI-IA1 yang berjumlah 20 orang. Metode pengumpulan data dilakukan dengan cara observasi, tes tertulis, dan angket. Hasil penelitian menunjukkan bahwa siswa terlibat aktif dalam pembelajaran dimana aktivitas siswa meningkat dari 68,1% pada pertemuan pertama menjadi 77,9% pada pertemuan kedua. Siswa senang belajar materi koloid dengan menggunakan pendekatan STM sehingga hasil belajar siswa tuntas pada dua pertemuan dengan persentase secara klasikal 75% pada tes pertemuan pertama dan 85% tes pertemuan kedua. Persentase siswa yang memberikan tanggapan positif pada penerapan pendekatan STM sebesar 85% sedangkan 15% siswa memberikan tanggapan negatif. Berdasarkan hasil penelitian dapat disimpulkan bahwa aktivitas siswa meningkat, hasil belajar siswa tuntas secara klasikal dan siswa memberi tanggapan positif terhadap penerapan pendekatan STM pada materi koloid.
PENERAPAN METODE TEAM TEACHING PADA MATERI IKATAN KIMIA UNTUK MENINGKATKAN HASIL BELAJAR SISWA KELAS X SMAN 9 TUNAS BANGSA BANDA ACEH Latifah Hanum
Chimica Didactica Acta Vol 1, No 1 (2013)
Publisher : FKIP USK

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Abstract

This descriptive qualitative study aims to determine the activities of students and teacher as well as the ability to improve student learning outcomes through the implementation of team teaching method in the concept of chemical bonds. The subjects were 32 students of class X-1 SMAN 9 Tunas Bangsa Banda Aceh consisting of 18 female and 14 male. The data was collected through observation of students’ activity and teacher’s activity in implementing team teaching methods as well as providing a test at the end of the meeting. Data obtained from the observation suggests that the activity of students at each meeting (1st, 2nd and 3rd) increase significantly at 66.07%, 76.79% and 87.5%. Based on the observation, the ability of teachers in the implementation of team teaching increased from 73.44% in first meeting to 81.25% in the second meeting and 90.63% in the third meeting. Learning outcomes of students also increased as follows 62.5% (1st meeting), 81.25% (2nd meeting) and 93.75% (3rd meeting). Based on the results of study, it is can be concluded that the implementation of team teaching method can improve learning outcomes as well as student activity and the ability of teachers to implementing instructional material in the chemical bonds at SMAN 9 Tunas Bangsa Banda Aceh
PENINGKATAN PEMAHAMAN KONSEP IKATAN KIMIA MELALUI PERBAIKAN BAHAN AJAR Agus Mukti Wibowo
Chimica Didactica Acta Vol 1, No 1 (2013)
Publisher : FKIP USK

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Abstract

Most of the materials in chemical bond are abstract concepts such as ions, ionic radii and orbital. Concepts are considerably difficult to be studied by students who have not had formal thinking ability. This difficulty may be caused error concept, namely the concept of student understanding is different from the agreement by experts. One source of error is the concept of the textbooks used in the learning process. Inproper emplanation or inadequate chemical bonds in the material in the books or high school chemistry teaching materials can lead to errors in sudent. The remedial concept using materials that have been corrected his mistakes and shortcomings plus can reduce errors that occur in students' concept.
PENGEMBANGAN MODUL KOMPOS TERINTEGRASI KONSEP KIMIA SEBAGAI BAHAN AJAR UNTUK SISWA PROGRAM AGRIBISNIS TANAMAN PERKEBUNAN (ATP) SMKN ACEH TIMUR Jofrishal Jofrishal
Chimica Didactica Acta Vol 1, No 1 (2013)
Publisher : FKIP USK

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Abstract

Learning curriculum in a vocational school combines the adaptive, normative and productive subject group. The adaptive, normative and productive subject groups are expected to be mutually supportive and complementary, in fact the group of subjects did not support each other. The purpose of this study is to develop a learning module for productive subject package (composting techniques) which is integrated by the concept of chemistry as one of the adaptive subjects in vocational school, another purpose of this study is to collect the responses of teachers and students on the module, the module quality assessment by experts, assessment of the portion of chemical concepts that integrated in the module by specialists and module effectivity test. The development of module is using the one of instructional development model in teaching materials development known as ADDIE model (analysis, design, development, implementation, evaluation). The results showed that 92% of teachers responded positively to the module, 85% of students responded positively . While the negative resposes from teacher wes 8% and 15% for student responses. The module quality assessment indicate score 3.36 which the criteria "good" and the expert assessment of chemical concepts are integrated in the module is 70% - 80%. The effectivity of module using student test results indicate the average grades is 92 which criteria "very good". The results suggest that the effectivity of the module is very good for learning.
PENERAPAN PENDEKATAN PROBLEM SOLVING PADA MATERI SIFAT KOLIGATIF LARUTAN DI MAN MODEL BANDA ACEH TAHUN AJARAN 2012/2013 Nuraini Nuraini
Chimica Didactica Acta Vol 1, No 1 (2013)
Publisher : FKIP USK

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Abstract

The research about Application Problem Solving Approach to content colligative properties of solution in MAN Model Banda Aceh aims to determine student learning yield, student activities, and student responses after given problem solving approach used in learning. The subjects of the research were 32 students of class XII-IA2 MAN Model Banda Aceh in academic year 2012/2013, with heterogenous acchivement. Data collection was conducted through written tests and observations. Based on objective tests given after the study ended, student learning yield was obtained very good with the level of completeness of 96.67%. Activity of student suggests that a good percentage of the activity (79.82%). The response of students to the problem solving approach learning shows that students gave a positive response is very good (91.52%). Thus, it is conclused that applying of problem solving approach to the material colligative properties of solution can increase student learning yield, activities, and student motivation.
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

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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.
MENINGKATKAN KETERAMPILAN DASAR MENGAJAR KIMIA MELAUI PEMBELAJARAN BERBASIS BOARD GAME (BGBL) Habiddin Habiddin
Chimica Didactica Acta Vol 1, No 1 (2013)
Publisher : FKIP USK

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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.

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