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Journal Of Research and Education Chemistry (JREC)
Published by Universitas Islam Riau
ISSN : 26858967     EISSN : 26858959     DOI : https://doi.org/10.25299/jrec.2022.vol4(1).9315
Core Subject : Science, Education, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Education
1. research and reviews literature about chemistry education such as : instruction, learning and theaching, curriculum development, learning environment, theacher education, educational and educational development in chemistry education 2. research and review literature about chemistry such as : organic, inorganic physical, analitycal, biochemistry, material chemistry, environment, ethnochemistry and its application in teaching and learning
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 5 Documents
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Search results for , issue "Vol. 4 No. 2 (2022): OKTOBER" : 5 Documents clear
DESAIN DAN UJI COBA LEMBAR KERJA PESERTA DIDIK BERBASIS CTL PADA MATERI LAJU REAKSI: LEMBAR KERJA PESERTA DIDIK BERBASIS CTL LAZULVA LAZULVA; Nurhafizoh Nurhafizoh
Journal of Research and Education Chemistry Vol. 4 No. 2 (2022): OKTOBER
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2022.vol4(2).9347

Abstract

This research was instigated by student workbook Contextual Teaching and Learning based that was not yet developed on Reaction Rate lesson. Besides, the students cold not relate what they learnt and how the knowledge should be applied in their daily lives. This research aimed at producing student workbook Contextual Teaching and Learning based on Reaction Rate lesson and knowing the validity and practicality level, and student response to the produced workbook. It was a Research and Development with 4-D (Define, Design, Develop, Disseminate) model. It was administered at State Senior High School 2 Kampar, and the subjects of this research were student workbook media design experts, learning material experts, Chemistry subject teachers, and students. The object was student workbook Contextual Teaching and Learning based on Reaction Rate lesson. The collected data were primary—the data were obtained directly from questionnaire. The instruments of collecting the data were validity test questionnaire, practicality test questionnaire, and student response test questionnaire. The obtained data then were analyzed by using Descriptive qualitative and quantitative analysis techniques. Based on the produced workbook that was tested, its validity level was 88.78% percentage (very valid), its practicality level was 88 % percentage (very practical), and student response was 88 % percentage (very good). Based on these results, it could be concluded that student workbook Contextual Teaching and Learning based was valid and practical on Reaction Rate, so it was appropriate to be an additional teaching material for the teachers at school.
Desain dan Uji Coba Media Motion Comic Berbasis SETS (Science, Environment, Technology, Society) pada Materi Asam Basa Lisa Utami; Uci Nornasari1
Journal of Research and Education Chemistry Vol. 4 No. 2 (2022): OKTOBER
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2022.vol4(2).10558

Abstract

This research aimed at designing SETS (Science, Environment, Technology, Society) based Motion Comic media on Acid Base lesson valid based on the validation by the experts of material and media, teacher practicality and student response. It was R&D (Research and Development) with 4-D development model. It was conducted at State Senior High School 01 Kampar Kiri Tengah to the eleventh-grade students of Natural Science 3. Motion Comic media could be stated proper, if it completed the valid and practical aspects. Validity could be seen from the result of validation by using validation sheet. The validation result percentage by the expert of material overall was 92.22% with very valid criterion. The validation result percentage by the expert of media overall was 82.85% with very valid criterion. Teacher practicality test was conducted to 2 teachers, and the result was 85.71% with very practical criterion. Student response was obtained from 12 students, and the questionnaire result was 84.64% with very good criterion.
The ANALISIS PENGARUH HUMIDITY TERHADAP LAJU KOROSI MENGGUNAKAN RIMPANG JAHE MERAH SEBAGAI PENGHAMBAT LAJU KOROSI ayyi husbani; Novrianti Novrianti; Neneng Purnamawati
Journal of Research and Education Chemistry Vol. 4 No. 2 (2022): OKTOBER
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2022.vol4(2).10712

Abstract

Corrosion is one the problems that occur in the production process in oil and gas industries that can reduce material equipment such as tubing and flowline. corrosion is influenced by humidity and temperature. Corrosion can be control by using organic inhibitors because they are environmentally friendly. This research is a laboratory research that examines the effect of humidity using red ginger on reducing corrosion flow rate. Red ginger is used because it contains phenol antioxidants which can inhibit the corrosion flow rate. The variables used were variations in room humidity, 80%, and 90% and the inhibition time was 72 hours, 144 hours, and 216 hours. The results showed that the sample by adding red ginger inhibitor at room temperature humidity, 80%, 90% was able to maximize decrease in the corrosion rate. The sample with the addition of ginger inhibitor showed the higher the humidity value, the higher the corrosion rate where the highest corrosion rate was 0.1362 mmpy at 90% humidity, while the lowest humidity was obtained at room humidity of 0.0517 mmpy. Keywords : Humidity, Corrosion, Inhibitor, Red ginger, Coating
Analisis Nilai Kalor Berbagai Jenis Briket Biomassa Secara Kalorimeter Imam Ardiansyah; Arief Yandra Putra; Yelfira Sari
Journal of Research and Education Chemistry Vol. 4 No. 2 (2022): OKTOBER
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2022.vol4(2).10735

Abstract

Saat ini sumber energi yang banyak digunakan adalah energi tak terbarukan yaitu yang berasal dari alam seperti minyak bumi, batu bara dan gas bumi yang apabila digunakan terus menerus akan habis. Upaya untuk menghindari ketergantungan energi adalah pemanfaatan limbah pertanian, perkebunan dan hutan yang dijadikan sebagai energi alternatif dengan cara dibuatkan menjadi briket. Kualitas briket SNI yaitu memiliki Kadar Air ≤ 8% Kadar Abu ≤ 8% Nilai Kalor ≥ 5000 cal/g. Penelitian ini menggunakan metode studi pustaka dengan melakukan sistematika riview dari beberapa jurnal penelitian. Diapat bahwa dari beberapa jurnal yang di riview nilai kalor dari briket batang gulma siam : perekat dengan komposisi 91 : 9 memiliki nilai kalor 12106,27 cal/g merupakan nilai terbaik yang didapat.
Pembuatan Limbah Cangkang Telur Sebagai Katalis Heterogen untuk produksi Biodisel Vivi Sisca; Jumriana Rahayunigsih
Journal of Research and Education Chemistry Vol. 4 No. 2 (2022): OKTOBER
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2022.vol4(2).10862

Abstract

Limbah cangkang telur digunakan sebagai bahan baku untuk pembuatan katalis heterogen dalam produksi biodiesel. Sebelum digunakan, kandungan kalsium karbonat (CaCO3) dalam limbah cangkang telur dikonversi ke kalsium oksida (CaO) dengan kalsinasi pada 200-1000°C untuk 2jam. Sifat fisikokimia katalis oksida padat dianalisis menggunakan difraksi sinar-X (XRD). Aktivitas katalitik dari katalis dalam transesterifikasi minyak sayur dengan metanol dievaluasi. Pengaruh waktu reaksi, suhu reaksi, rasio molar metanol:minyak, jumlah katalis, juga diselidiki. limbah cangkang telur adalah sumber daya hayati untuk produksi katalis basa heterogen yang berhasil dimanfaatkan untuk sintesis biodiesel dengan kemurnian tinggi, hemat biaya dan ramah lingkungan.

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