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Siang Tandi Gonggo
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Chemistry Education

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Pengaruh Alumina Terhadap Membran Blend Kitosan-Polivinil Alkohol- LitiumSebagai Membran Elektrolit Baterai Mesakh, Eka Putra; Napitupulu, Mery; Gonggo, Siang Tandi
Jurnal Akademika Kimia Vol 6, No 2 (2017)
Publisher : Universitas Tadulako

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Abstract

The research aim was to study the effect of adding % weight alumina on the conductivity of polymer electrolyte chitosan-PVA-lithium. The characterization of functional groups was determined using fourier transform infrared spectrometry (FTIR). The Ionic conductivity of polymer electrolyte chitosan-PVA-lithium-alumina was measured by using impedance spectroscopy. The measurement results show the polymer electrolyte with the addition of 5% alumina provides the highest ionic conductivity of 3.991 x 10-3S/cm. Battery characteristics of electrolyte polymer of chitosan-PVA-lithium with the addition of alumina have a voltage of 1.4 Volts compared to commercial batteries which have a voltage of 1.5 Volts. These results indicate that alumina can be used as a filler to increase the ionic conductivity.
PENGGUNAAN QR CODE DALAM PEMBELAJARAN POKOK BAHASAN SISTEM PERIODIK UNSUR PADA KELAS X SMA LABSCHOOL UNTAD Mustakim, Sartika; Walanda, Daud K.; Gonggo, Siang Tandi
Jurnal Akademika Kimia Vol 2, No 4 (2013)
Publisher : Universitas Tadulako

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Utilization of information technology in particular a QR code in education is still lacking. Therefore the reseacher is examining the QR code in the chemistry learning. Teaching and learning activities in the classroom are still dominated by teachers, meanwhile students seem expect more aids from their peers in performing the task. which due to a number of student are still lack of confidence in completing their tasks. In this study, the researchers use the QR code in the learning of periodic table topics regarding properties of elements. The problem statement was wether the learning outcomes of student who involved in the learning using QR code are better than student who take lessons without involving the use of QR code. The number of student in class X science Labschool Untad for 2013/2014 academic year are 22 student in experimental classroom and 22 student in control classroom which are determined by purposive sampling. Based on the results, it is concluded that the learning outcomes of students who took lessons with the use of QR code is higher than the learning outcome of students who took the lessons without involving the use of QR code for student in class X SMA Labschool Tadulako University.
Analisis Tembaga (Cu) Dan Timbal (Pb) dalam Air Laut dan Sedimen di Perairan Pantai Loli Kecamatan Banawa Kabupaten Donggala Santi, Santi; Tiwow, Vanny M. A.; Gonggo, Siang Tandi
Jurnal Akademika Kimia Vol 6, No 4 (2017)
Publisher : Universitas Tadulako

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Abstract

This study aimed to determine the concentration of heavy Cu and Pb in seawater and sediment in coastal waters Loli subdistrict Banawa, district Donggala. The method used was destruction and using Atomic Absorption Spectrophotometer (AAS) instrument.Samples of seawater and sediment were taken by two sampling points. Samples were destructed by using a solution of HNO3 and HClO4with ratio 4: 1. Levels were measured at a wavelength of 325.7 nm for Cu and 217 nm for Pb. The analysis result obtained that the levels of Pb in the seawater in the range of 0,531-0.671 mg/L, while for Cu in the range of 0.009-0.090 mg/L it can be concluded that the levels of Pb and Cu in seawater has exceeded the levels were of 0,008 mg/L. For sediment samples obtained that Pb levels were around 1,78-7,73 mg/kg while for Cu 15.86-68.88 mg/kg so Cu in sediment was up to 30 mg/kg while the levels of Pb did not exceed the tolerance limits of 33 mg/kg.
Pengaruh Model Pembelajaran Kooperatif Tipe NHT (Numbered Heads Together) Terhadap Hasil Belajar Siswa Kelas XI IPA SMA Negeri 1 Dolo Pada Materi Pelajaran Kimia Koloid Febiliyanti, Rezha; Tiwow, Vanny M.A.; Gonggo, Siang Tandi
Jurnal Akademika Kimia Vol 3, No 2 (2014)
Publisher : Universitas Tadulako

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Abstract

This research is motivated by low achievement and lack of chemistry students in learning activities especially on the subject of colloids. Based on observations in SMA Negeri 1 Dolo, it has known that the process of teaching and learning suggests that teachers in teaching chemistry concepts and theories through learning activities centered on the teacher or just direct instruction, students were not actively engaged in activities and less opportunity to develop the students thinking process, so the learning process tends boring and turned to student learning laziness. These problems could be overcome by using a type of learning model NHT (Numbered Heads Together). This study aims to figure out the Effects of Cooperative Learning Model Type NHT (Numbered Heads Together) on Student Results of Class XI IPA SMAN I Dolo on topic Colloids. The population in this study was the students of class XI SMA Negeri 1 Dolo 2012/2013 school year, and the research sample was 33 students of class XI IPA 3 as the experimental class (learning by using NHT), and 34 students of class XI IPA 2 as a control class (direct learning). Data were obtained by providing post-test to both samples group. After that, the data were analyzed to test the hypothesis by using one tail t-test. The average and the deviation standard obtained for the experimental class was 64.15 and 10.75. While the average and deviation standard for control class was 53,03 and 10,21. Based on t-test analysis, it can be concluded that the learning outcomes of students who use cooperative learning model NHT (Numbered Heads Together) is higher than student learning outcomes using direct instructional model.
Pengaruh Konsentrasi Getah Pohon Kayu Jawa (Lannea Coromandelica) Terhadap Konduktivitas Membran Blend Kitosan-Polivinil Alkohol-Litium Sebagai Membran Elektrolit Masriana, Masriana; Napitupulu, Mery; Gonggo, Siang Tandi
Jurnal Akademika Kimia Vol 6, No 3 (2017)
Publisher : Universitas Tadulako

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Abstract

This research aims to study the concentration effect percentage weight of kayu jawa latex on the conductivity of membranes made from chitosan-PVA-lithium. The ionic conductivity of the membrane chitosan-PVA-lithium-latex kayu jawa was measured by impedance spectroscopy. The measurement results showed that membrane with the addition of 15% latex kayu jawa provided the highest conductivity values of 10.99353 x 10-4 S/cm. Characterization of the polymer electrolyte batteries that made from chitosan-PVA-lithium with the addition of latex kayu jawa have voltage of 1.5 Volts compared to commercial batteries that have tension was 1.5 Volts. These results indicated that latex kayu can be used as a filler to increase the ionic conductivity.
Pengaruh Lama Waktu Fermentasi Terhadap Kadar Bioetanol dari Pati Ubi Jalar Kuning (Ipomea batata L) Moede, Fika Herlina; Gonggo, Siang Tandi; Ratman, Ratman
Jurnal Akademika Kimia Vol 6, No 2 (2017)
Publisher : Universitas Tadulako

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Abstract

The sweet potato is yellow is one that the carbohydrate that is high, so it can be used as one of the alternative raw materials for bioethanol. This study aims to determine the levels of ethanol sweet potato is yellow through fermentation with the use of yeast bread with a variety of time 3, 4, 5, 6, dan 7 days at room temperature. The results of the research showed glucose levels derived from the process of hydrolysis using acid HCl 21% were of 4.54% with high levels ethanol that optimum obtained through fermentation use of yeast Saccharomyces cerevisiae of 9.70% over fermentation 5 days.
PENINGKATAN HASIL BELAJAR KIMIA MENGGUNAKAN MULTIMEDIA PADA MATERI IKATAN KIMIA KELAS X SMK NEGERI PARIGI SELATAN Jumadil, Jumadil; Gonggo, Siang Tandi; Rahmawati, Sitti
Jurnal Akademika Kimia Vol 2, No 1 (2013)
Publisher : Universitas Tadulako

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Abstract

This study aims to determine whether to use the multimedia macromedia flash points can increase the activity and learning achievement of students in the chemical bond subject at class X SMK South Parigi. The sample is a class X SMK south Parigi is 46 students. This research is the Classroom Action Research (PTK) type which was implemented in three cycles, where each cycle consists of four stages, namely: planning, implementation, observation, reflection. Data obtained from each cycle were analyzed to determine the corrective action in the next cycle. Data collection is carried out through a test which consists of post tests at each end of the learning cycle 1, 2, 3 and also interviews for the entire series of events during the activity, as well as the observation sheet activities of teachers and students of each meeting. The collected data were statistically analyzed using the average of the class, classical absorption, and the thoroughness of learning. On the cycle I the average value of 6.87, the absorption of classical learning 68.81% and 68.42% completeness, in the second cycle the average value was 7.73, 77.32 and 88.37% and classical absorption the completeness study on a third cycle of the average value was 8.23, the absorption of classical learning 82.33% and 93.33% completeness. While on the student activity, the cycle I get an average score of 27 which is an increase in the second cycle to 36 and 40 in cycle III with both criteria. Therefore, the use of power point and multimedia macromedia flash in learning can improve student learning activities and results.
PERBEDAAN HASIL BELAJAR SISWA SMA NEGERI 5 PALU MELALUI PENERAPAN MODEL PEMBELAJARAN KOOPERATIF TIPE COURSE REVIEW HORAY DAN KONVENSIONAL PADA MATERI LARUTAN ELEKTROLIT DAN NONELEKTROLIT Salim, Agustiawan Amat; Said, Irwan; Gonggo, Siang Tandi
Jurnal Akademika Kimia Vol 2, No 3 (2013)
Publisher : Universitas Tadulako

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Abstract

One of indicator that quality of education said to be good is when students able to apply what they have learned at school to deal with problems in their daily life. Learning in the classroom should not only focus on mastery of the materials but also how to create the atmosphereT in the classroom to be fun and interesting so that students are not bored and learning outcomes can be improved. Course Review Horay (CRH) is one of a model that can be applied. This research aims to find out the difference of learning outcome of SMA Negeri 5 Palu through cooperative learning model application of CRH on electrolyte and non electrolyte solutions material. Populations of this research are all students of grade X of SMA Negeri 5 Palu for Academic Year of 2012/2013 which are consists of seven classes. Sample of this research consist of two classes which are class XA with 28 students as experiment class and class XG with 27 students as control class which determined by purposive sampling. Data collection is conducted using test instrument such as chemistry learning achievement of Electrolyte and non electrolyte solutions material. Data from research result is tested using two parties t-test with prerequisite test which are; normality test and homogeneity test. Average score of students learning outcome using cooperative learning model CRH is 23.21 while the average score of students learning outcome who join the conventional teaching is 19.93. Based on the statistic analysis with statistic t-test is achieved thitung = 4.81 and this is in the rejection area of H0 which is -2.00 and 2.00. Therfore, it can be concluded that there is a difference of students learning outcome through Cooperative learning model application of CRH type and conventional to the students grade X of SMA Negeri 5 Palu.
Bioadsorpsi Pb(Ii) Menggunakan Kulit Jeruk Siam (Citrus Reticulata) Solika, Nafikatus; Napitupulu, Mery; Gonggo, Siang Tandi
Jurnal Akademika Kimia Vol 6, No 3 (2017)
Publisher : Universitas Tadulako

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Abstract

A research about the bioabsorption of Pb(II) using the tangerine peel (Citrus reticulata) has been done. The purpose of this study is to determine the optimum contact time of tangerine peel and to determine the pH of the tangerine peel on the adsorption power of Pb(II) in solution. The method used in this study was a laboratory experiment using the tangerine peel waste as the adsorbent of Pb(II). The concentration of Pb(II) adsorbed was measured using a spectrophotometer spectrodirect. The results showed that the optimum contact time of adsorption the metal ions Pb(II) was 60 minutes with the absorption efficiency of 96.19%. The pH optimum of adsorption of the metal ion Pb(II) was at pH 4.0 with the absorption efficiency of 93.05%.
Pengaruh Model Pembelajaran Kooperatif Tipe Snowball Throwing Terhadap Hasil Belajar Siswa Pada Materi Bentuk Molekul Kelas XI IPA SMA Negeri 1 Pasangkayu Raguwan, Raguwan; Gonggo, Siang Tandi; Sabang, Sri Mulyani
Jurnal Akademika Kimia Vol 3, No 1 (2014)
Publisher : Universitas Tadulako

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Abstract

The study of effect of cooperative learning model of snowball throwing type in the molecule shape had been conducted. This study aims to find out the effect of cooperative learning model of snowball throwing on the student’s study outcome in molecule shape material science of SMA Negeri 1 Pasangkayu for 2013 neadenic year. The samples of study are grade XI Science 3 as experimental class (learning by using cooperative learning model of snowball throwing type) with 30 students and grade XI science 1 as a control class (convensional learning) 30 students. Data collection was conducted by using test instrument of study outcome in molecule shape material wich was validated before. The data analysis obtained average score in experimental class = 77.23 and for control class obtained average score 58.7. Based on the hypotesis analysis with t-test of statistic on the party was obtained the value of tcounted= 5.65 and ttable= 1.671 on a = 0.05. H1 was accepted and H0 was rejected, because tcounted was in area of rejection. This shows that the cooperative learning model of snowball throwing type gave positive effect on student study outcome in the molecule shape material in grade XI science of SMA Negeri 1 Pasangkayu.
Co-Authors Agustin Tiwow Anang Wahid M.Diah Andriani Andriani Daud Karel Walanda Febiliyanti, Rezha Indarini Dwi Pursitasari Islamiyah, Ukuwah Juliana, I Nengah Jumadil, Jumadil Lanteene, Reki Masriana Masriana, Masriana Masrita, Masrita Mery Napitupulu Mesakh, Eka Putra Milawati Milawati Moede, Fika Herlina Muhammad Agus Muljanto Mustakim, Sartika Najamudin Lagganing Nurdin Rahman Paulus Hengky Abram Pusung, Widya Astuti Raguwan, Raguwan Ratman Ratman Rezki, Atika Putri Salim, Agustiawan Amat Santi Santi Setiawati, Eka Lilis Sitti Rahmawati Solika, Nafikatus Sri Mulyani Sabang Supriatni, Dina