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All Journal Alotrop Jurnal Pendidikan dan Ilmu Kimia
Hermansyah Amir
Pendidikan Kimia, FKIP-UNIB
Chemistry Education

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Pembuatan Membran Dari Ampas Tebu dan Aplikasinya Untuk Menyaring Air Tanah dan Air Gambut I Nyoman Candra; Sugiono; Hermansyah Amir
ALOTROP Vol. 6 No. 2 (2022): Pembelajaran Abad 21
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i2.24324

Abstract

The production and use of a membrane filter made from bagasse (Saccharum officinarum) to filter ground water and peat water had been conducted. The purpose of this research are to evaluate the yield of membrane filter produced from bagasse, assess its ability to filter ground water and peat water as well as to measure the physical and chemical properties covering pH, turbidity and iron concentration, of those waters after filtered out with the membrane filter. Bagasse was used as a raw material for producing membrane filter through pulping process, followed by vulcanized fiber method using ZnCl2. From 100 g of bagasse, 38.7% membrane filter was produced. The membrane filter could increase ground water and peat water quality by increasing ground water and peat water pH from 6.7 to 7.2 and from 6.1 to 7.4 respectively. It also reduced ground and peat water turbidity from 48.33 to 1.67 NTU (96%) and from 65 to 2.67 NTU (96%) respectively. Iron concentration declined from 4.67 to 0.056 mg/L (for ground water) and from 3.645 to 0.121 mg/L (for peat water) respectively. Membrane filter produced from bagasse could improve ground and peat water quality after filtered out, whose physical and chemical properties met the quality standard of water according to Health Ministry Regulation of Republic of Indonesia No.492/Menkes/Per/IV/2010.
PENGEMBANGAN MEDIA PEMBELAJARAN MIT APP INVENTOR BERPLATFORM ANDROID PADA MATERI STOIKIOMETRI DI KELAS X MIPA SMAN 7 KOTA BENGKULU Ruth Sinthia Ginting; Sura Menda Ginting; Hermansyah Amir
ALOTROP Vol. 6 No. 2 (2022): Pembelajaran Abad 21
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i2.24345

Abstract

This study aims to test the feasibility of learning media and determine student responses to the developed learning media. This type of research is research and development using a development model adapted from the Borg & Gall model, namely: 1) Potential and Problems, 2) Data Collection, 3) Product Design, 4) Design Validation, 5) Design Improvement, 6) Product Trial, 7) Product Revision, 8) Usage Trial, 9) Product Revision, and 10) Mass Product Manufacturing. But in this research, the research stages are limited to the sixth step namely the product trial stage. The research instruments used were interview sheet with chemistry teachers, questionnaires sheet to validate learning media and student response questionnaires to the developed media. The research was conducted at Bengkulu University and at SMAN 7 Bengkulu City with a research sample of 36 students of class X MIPA 4. From the research results obtained from learning media according to material expert validators is 88.75% and according to media expert validators is 90.90%. The average percentage of the feasibility of the learning media developed is 89.825%, so based on the results of validation by all validators, it is stated "Very Valid". Based on the results of product trials, the results of student responses in class to the MIT App Inventor learning media on stoichiometry material obtained a percentage of 89.27% ​​which was included in the very good category. The results of this study indicate that the MIT App Inventor learning media on stoichiometric material that has been developed is very feasible to use and feasible to be applied to the learning process
PENGEMBANGAN E-LKPD BERBASIS VIRTUAL LABORATORY PhET DILENGKAPI KETERAMPILAN PROSES SAINS PADA MATERI ASAM BASA (Research And Development) Febri Nurason; Hermansyah Amir; Nadia Amida
ALOTROP Vol. 6 No. 2 (2022): Pembelajaran Abad 21
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i2.25517

Abstract

This study aims to determine the feasibility, student responses and the completeness of science process skills on the PhET E-LKPD with acid-base material. This research is a research and development that adapts the 4D model which is limited to the third stage, namely the development stage. The data in this study were obtained from the results of interviews, material and media validation questionnaires and student response questionnaires. The population in this study were students of class XI MIPA 4 SMAN 3 Bengkulu City with 17 people. The results of the material and media test of E-LKPD PhET obtained values of 93.18% and 88.64% which are included in the very feasible category dan while the results of the student response test to the PhET E-LKPD obtained a value of 89.26% which is included in the very feasible category. The prepared PhET E-LKPD has been equipped with aspects of science process skills such as observing, formulating hypotheses, designing experiments, taking measurements, interpreting data, concluding and communicating. So it can be concluded that the PhET E-LKPD is suitable for use in the learning process. Keywords : E-LKPD, PhET, Acid-Base
Co-Authors Febri Nurason I Nyoman Candra Nadia Amida Ruth Sinthia Ginting Sugiono Sura Menda Ginting