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Journal Of Research and Education Chemistry (JREC)

jrec
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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 44 Documents

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UJI KUALITAS AIR TANAH DARI KADAR TDS, ION SO42- DAN NO3- DI KECAMATAN KUBU BABUSSALAM, ROKAN HILIR arief yandra putra; Yelfira Sari
Journal of Research and Education Chemistry Vol. 1 No. 2 (2019): Oktober
Publisher : UIR Press

Air tanah memiliki peran yang sangat penting karena menjadi sumber utama untuk memenuhi kebutuhan pokok orang banyak. Air tanah dalam siklus hidrologi melibatkan beberapa aspek yang mempengaruhi ketersediaan air tanah di suatu daerah. Pada, kondisi sekarang masalah yang paling utama adalah sumber daya air. Beberapa kegiatan berdampak negatif terhadap penurunan kualitas air yang berasal dari kegiatan industri, domestik dan kegiatan lainnya. Tujuan dari penelitian ini adalalah untuk menganalisis kualitas air tanah di kecamatan Kubu Babussalam, Kabupaten Rokan Hilir, Provinsi Riau yang ditinjau dari parameter kadar TDS, Ion Sulfat dan Ion Nitrat. Proses pengambilan sampel menggunakan teknik random sampling. Berdasarkan hasil uji yang dilakukan terhadap kandungan TDS, Ion sulfat dan ion nitrat berada dibawah ambang batas baku mutu yang ditetapkan oleh Peraturan Menteri kesehatan No: 416/MEN.KES/PER/IX/1990.

KESELARASAN ANTARA KURIKULUM DAN PEMBELAJARAN IPA-KIMIA SMP oktariani oktariani; andhika baruri
Journal of Research and Education Chemistry Vol. 1 No. 2 (2019): Oktober
Publisher : UIR Press

ABSTRACT This study was conducted to: (1) analyze the level of alignment between curriculum and science-chemistry learning in Junior High School and (2) describe the discrepancies between curriculum and science-chemistry learning in Junior High School in term of cognitive demands as well as subject content covered. This study was descriptive research which combined survey method and content analysis. The survey was conducted on 25 Junior High School science teacher in Bandung. Content analysis conducted on curriculum science-chemistry document. To determine the degree of alignment criteria, this study used the method developed by Porter. The results showed that alignment index between chemistry content on TIMSS and science-chemistry learning in Junior High School was 0.572 (middle level). This imperfect of alignment is characterized by the discrepancies in term of subject content covered and cognitive demands. This can affect certainly toward the achievement of students and quality of education in Indonesia. Keywords: Alignment Index, alignment, curriculum, science-chemistry learning in Junior High School,. ABSTRAK Penelitian ini dilakukan untuk: (1) menganalisis keselarasan antara kurikulum dan pembelajaran IPA-Kimia SMP, dan (2) mendeskripsikan perbedaan cakupan materi dan tuntutan kemampuan kognitif antara kurikulum dan Pembelajaran IPA-Kimia SMP. Penelitian ini merupakan penelitian deskriptif yang menggabungkan metode survei dan analisis konten. Survei dilakukan terhadap 25 orang guru IPA SMP di kota Bandung. Penentuan subjek penelitian ini dilakukan dengan teknik stratified sampling. Analisis konten dilakukan terhadap kurikulum IPA-Kimia SMP. Untuk menentukan kriteria tingkat keselarasan, metode yang digunakan adalah metode yang dikembangkan oleh Porter. Hasil penelitian menunjukkan bahwa indeks keselarasan antara kurikulum dengan pembelajaran IPA-Kimia SMP sebesar 0,572 (tingkat sedang). ketidaksempurnaan tingkat keselarasan ini ditandai dengan adanya perbedaan cakupan materi dan tuntutan kemampuan kognitif. Ini tentu mempengaruhi pencapaian siswa dan mutu Pendidikan di Indonesia Kata-kata kunci: indeks keselarasan, keselarasan, kurikulum, pembelajaran IPA-Kimia SMP

PEMANFAATAN ANIMASI MACROMEDIA FLASH DALAM MENINGKATKAN HASIL BELAJAR Asyti Febliza; Zul Afdal
Journal of Research and Education Chemistry Vol. 1 No. 2 (2019): Oktober
Publisher : UIR Press

Abstract This study aims to implement macromedia flash animation in improving student learning outcomes on the topic of buffer solutions. This research was conducted in the first semester of the basic chemistry course with the topic of buffer solution. The samples in this study were first semester students at the University of Riau divided in 2 classes. This study is quasi-experimental, by making treatment in the experimental class (animation class) by comparing with the control group. The hypotheses tested in this study are: Ha = There are differences in the level of learning outcomes of the experimental class and the control class and H0 = There is no difference in the level of learning outcomes of the experimental class and the control class. Hypothesis testing is done by the independent sample T-Test on SPSS 22 with a significance level of 0.05 which used gain score. Based on the results and discussion it can be concluded that the experimental class has an increase in learning outcomes by 57%, while the increase in student learning outcomes in the control class is only 39%, which is about 2/3 of the increase in learning outcomes of the experimental class. Based on the results of the hypothesis test it can be concluded that Ha is accepted, namely there are differences in the level of learning outcomes of experimental class and control class where significance is equal to sig = 0.000, this value is smaller than the significance level of 0.05. Keywords: animation, macromedia flash, learning media, learning outcomes, buffer solutions

PENENTUAN KADAR LOGAM TIMBAL (Pb) AIR SUNGAI SINGINGI DI KABUPATEN KUANTAN SINGINGI RIAU Putri Ade Rahma Yulis
Journal of Research and Education Chemistry Vol. 1 No. 2 (2019): Oktober
Publisher : UIR Press

Heavy metal is the most hazardous of contaminats group. Our ecosystem has been contaminated by high concentrated of heavy metal that was generated from human activities such as industrial. On this research heavy metal content due to illegal gold mining (PETI) activities in Singingi river, Riau was measured. This was held because the river has degradation of its quality immediately. It was marked by high turbidity and declining of organism in that river. The choice of determining the content of heavy metal Pb or lead because we know that gold processing is not only used by mercury but also used by lead and cadmium to bind gold. The three metals are used to bind the gold and separate it from soil and stone in from sulfide.. This research used survey method with purposive sampling based on the rise location of PETI activities. Sample was measured at 4 point that started from the nearest and up to the furthest of PETI activities. The result of lead measurement was 0, 00382 mg/L; 0,00165 mg/L; 0,00124 mg/L and 0,02525 mg/L, respectively. The results obtained indicate that the river has been contaminated with lead metal although if were compared with the quality standard of heavy metal in aquatic Lead still allowed with the number of quality standard for lead is 0,03 mg/L. Keywords : PETI activities, heavy metal measurement, Lead (Pb) Singingi river

PENENTUAN KUALITAS FISIKA (WARNA, SUHU, DAN TDS) DARI SAMPEL AIR SUMUR WARGA DI KECAMATAN DUMAI TIMUR Yelfira Sari; Arief Yandra Putra
Journal of Research and Education Chemistry Vol. 1 No. 2 (2019): Oktober
Publisher : UIR Press

Water quality can be determined by doing certain test. Common parameter for determination water quality was physical, chemical, and biological parameter. This research was determined physical parameter, such as water colour, temperature, and TDS. Water colour determination was using eyesight sense while for temperature and TDS using a tool, thermometer for temperature determination and TDS-meter for TDS determination. Samples were taken from 5 Kelurahan in Dumai Timur District, that is Kelurahan Bukit Batrem, Kelurahan Buluh Kasap, Kelurahan Jaya Mukti, Kelurahan Tanjung Palas, and Kelurahan Teluk Binjai. Samples was taken from citizen wells which was selected in random as many as 2 samples for each Kelurahan. Water quality from samples was measured based on Regulation of Minister for Public Health No:416/MEN.KES/PER/IX/1990. Result of this research showed that all of water sample from Dumai Timur District were improper in physical parameter because of the water were turbid.

ANALISIS KUALITATIF KANDUNGAN BUNGA KENANGA (Cananga odorata) SECARA FITOKIMIA dengan MENGGUNAKAN PELARUT ETANOL Putri Ade Rahma Yulis; aisyah meiysa putri; Anasthasia oca muham; silvia anggraini; siti maisarmah
Journal of Research and Education Chemistry Vol. 2 No. 1 (2020): April
Publisher : UIR Press

Cananga (Cananga odorata) is a tree or shrub that can be used to produce essential oils. In this study a qualitative test was conducted to study the content of secondary metabolites in cananga flowers. Based on research results cananga flowers contain flavonoids, tannins, saponins and steroids, while anthraquinone and terpenoids are not needed. The existence of secondary metabolite content in this plant is intended to be used as a raw material needed because it has an active metabolite content that links this plant to have antioxidant and other antibacterial properties.

SINTESIS PERMUKAAN KACA HIDROFOBIK MELALUI KOMBINASI TiO2/ASAM STEARAT UNTUK APLIKASI MATERIAL SELF-CLEANING Diana Vanda Wellia; Febby Alvionita; Syukri Arief
Journal of Research and Education Chemistry Vol. 2 No. 1 (2020): April
Publisher : UIR Press

The surface of ultrahydrophobic glass has been successfully prepared using the combination of TiO2 and stearic acid. TiO2 was used to increase the surface roughness, while stearing acid was a surface modifier. The peroxo sol-gel method has been used to synthesize TiO2 precursors on the glass layer followed by modification of stearic acid. The maximal water contact angle of 141o has been obtained for the composition of 0.4 grams of stearic acid and 20 mL of ethanol (NKTS-2%). AFM analysis showed the roughness of NKTS-2% is 4,15 nm, which was greater than the pure glass. FTIR analysis also showed vibration of C=O (carbonyl) at 1697cm-1 indicating the chemical interaction between TiO2 and stearic acid. EDX spectrum analysis of TiO2/stearic acid (TiO2/C18H36O2) showed the existence of titanium, oxygen, and carbon. The optimum sample (NKTS-2%) showed a good transparency and self-cleaning properties compared to pure glass

REKAYASA STRUKTUR AKSEPTOR PADA ZAT WARNA ORGANIK TIPE D- π -A DENGAN KERANGKA TIOFEN Imelda Imelda
Journal of Research and Education Chemistry Vol. 2 No. 1 (2020): April
Publisher : UIR Press

This research study about tiofen based organic dyes with D-π-A type as sensitizer on DSSC. The dyes were varied with the acceptor chain and were given names of dyes 1 to 10. The dye with the smallest band gap was added with the electron withdrawing and donating groups. The computational study used the hyperchem package with the AM1 calculation method. The result showed that dye 8 has the smallest band gap is 4,9 eV and dipole moment is 9,3 D. The effect of adding Cl as an electron withrawing group (EWG) can reduce the band gap value to 4,7 eV. The conclusions are that dye 8 is more potential as sensitizer on DSSC and the addition of Cl as EWG can improve the light harvesting efficiency.

DESAIN DAN UJI COBA E-MODUL KIMIA BERBASIS PROBLEM SOLVING PADA MATERI LARUTAN PENYANGGA UNTUK KELAS XI SMA SEMESTER II: E-Modul Kimia Indah Julia
Journal of Research and Education Chemistry Vol. 2 No. 1 (2020): April
Publisher : UIR Press

Abstract The background of this research is due to the limited learning resources that are independent and the lack of learning resources that the connect of material with daily life.Thus, in this research it was designed a design and test of Problem-Solving based chemistry E-Module using Kvisoft Flipbook software on Buffer Solution lesson.This research was administered at SMA PGRI Pekanbaru. 4D development model was used in this research until Develop stage. The subjects of this research were a material validation, a media validation, and 1 teacher at the SMA PGRI Pekanbaru and 1teacher at the SMAN 5 Tapung to test the media practicality, and 10 students of SMA PGRI Pekanbaru were to know the response of the media to know the response of the media.The data were collected through interview and questionnaire. The obtained data then were analyzed by using qualitative and quantitative descriptive analysis techniques. Based on the research finding, it was obtained the assessment on material aspects 98.33% and by the media 95%, and they were on very valid criterion.The assessment percentage of student practicality test was 92.8% and the teacher was 93.5%, they were on very practical criterion. Keywords: E-Module, Problem Solving Approach, Kvisoft Flipbook, Buffer Solution

PENGARUH PENERAPAN PROJECT BASED LEARNING MELALUI GOOGLE CLASSROOM TERHADAP HASIL BELAJAR SISWA PADA MATERI LAJU REAKSI: PROJECT BASED LEARNING Widia Qholby; Lazulva
Journal of Research and Education Chemistry Vol. 2 No. 1 (2020): April
Publisher : UIR Press

The application of 2013 curriculum which has not been implemented perfectly become a problem in the learning process. This research aimed at knowing the effect of implementing Project Based Learning model with Google Classroom media toward student learning achievement on Chemistry subject, especially Reaction Rate lesson. It was an quasi experiment research with posttest only control group design. The eleventh-grade students of MIA were the population of this research. Random sampling was used in this research, and it was obtained the eleventh-grade students of MIA 1 (experimental group) and MIA 2 (control group). Interview, test, observation, and documentation were the techniques of collecting the data. Analyzing the data was using Independent t-test. Based on the results of Independent t-test with α=0.05, it was obtained the cognitive score of sig. (2 tailed) 0.046 (H0 was rejected). It showed that Project Based Learning model with Google Classroom media facilitated better learning achievement than the model without the use of Google Classroom media.

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Elfis

Contact Email elfisdoang@gmail.com

Phone +6281374567116

Journal Mail Official ariefyandra0811@edu.uir.ac.id

Editorial Address Jl. Kaharuddin Nasution No. 113. Pekanbaru-Riau

Location Kota pekanbaru, Riau INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Elfis

Contact Email
elfisdoang@gmail.com

Phone
+6281374567116

Journal Mail Official
ariefyandra0811@edu.uir.ac.id

Editorial Address
Jl. Kaharuddin Nasution No. 113. Pekanbaru-Riau

Location
Kota pekanbaru,

Riau

INDONESIA