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All Journal Chimica et Natura Acta Jurnal Scientia
Saronom Silaban
Department of Chemistry, Universitas Negeri Medan, Medan 20221, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Education Environmental Science Materials Science & Nanotechnology Mathematics

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DEVELOPMENT OF SETS-BASED CHEMISTRY TEACHING MATERIALS AND STUDENT RESPONSES TO SALT HYDROLYSIS MATERIALS Adila Mawaddah; Saronom Silaban
Jurnal Scientia Vol. 11 No. 01 (2022): Education, Sosial science and Planning technique, August
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (293.467 KB) | DOI: 10.35337/scientia.Vol11.pp49-56

Abstract

This study aims to determine whether the chemistry teaching materials developed have met the BSNP standards and are based on SETS and to determine student responses to the designed teaching materials. The development method refers toADDIE development model which has 5 stages, namely the Analysis, Design, Development, Implementation and Evaluation stages. This research stage is only up to the development stage. The results showed that the chemistry teaching materials that had been prepared had met the BSNP standard based on the results of the material expert validation, the average percentage was obtainedof 86.24% with valid/feasible criteria and based on the results of media expert validation, an average percentage of 84.44% was obtained with valid/feasible criteria. Meanwhile, the results of student responses to the designed teaching materials are very high with an average percentage of 88.33% obtained. Thus the SETS-based chemistry teaching materials on the salt hydrolysis material developed have met the BSNP standard and are suitable for use.n.
DEVELOPMENT OF SETS-BASED CHEMISTRY TEACHING MATERIALS AND STUDENT RESPONSES TO TEACHING MATERIALS ON HYDROCARBON MATERIALS Jessica Christine Rosalina Silaen; Saronom Silaban
Jurnal Scientia Vol. 11 No. 01 (2022): Education, Sosial science and Planning technique, August
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (358.758 KB) | DOI: 10.35337/scientia.Vol11.pp57-64

Abstract

The purpose of this study was to determine the feasibility of SETS-based chemistry teaching materials on hydrocarbon materials based on BSNP criteria and to determine student responses to the developed teaching materials. This research method uses research and development (R&D) with the ADDIE development model. The ADDIE development model has five stages, namely Analysis, Design, Development, Implementation, and Evaluation. The stages of this research are carried out until ADD (analysis, design, development) only. The results showed that the teaching materials that had been developed had met the eligibility criteria according to the BSNP standard based on the content feasibility aspect, the presentation feasibility aspect, and the language feasibility aspect, respectively, namely 89.44%, 88.43%, and with valid/feasible criteria. . While the results of student responses to the designed teaching materials are very high with an average percentage of 89.78%. It can be concludedSETS-based chemistry teaching materials on hydrocarbon materials developed have met BSNP standards and are suitable for use.
Synthesis and Crystal Structure of RbGdNb6Cl18 Fakhili Gulo; Saronom Silaban; Christiane Perrin
Chimica et Natura Acta Vol 11, No 2 (2023)
Publisher : Departemen Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cna.v11.n2.47103

Abstract

A new quaternary niobium cluster chloride, RbGdNb6Cl18 has been prepared by solid state reaction methods. The RbCl, GdCl3, NbCl5, and niobium powder were mixed in stoichiometric proportions. This mixture was fed into a sealed quartz tube, and heated at 700ºC for 2 days. A single crystal was selected for use in determining the structure of this compound using a single crystal X-ray diffractometer. It crystallizes in the trigonal system, hexagonal setting with space group R-3 (No. 148). The unit cell parameters are: a = 9.3037(2) Å, c = 25.5752(2) Å, V = 1.917.17(7) Å3, and Z =3. The structure consists of discrete cluster units, [Nb6Cl18]4- that separated by Rb+ and Gd3+ cations in a close packed cubic stacking arrangement.
Co-Authors Adila Mawaddah Christiane Perrin Fakhili Gulo Jessica Christine Rosalina Silaen