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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Biolearning Journal
Jukwati Jukwati
Universitas Cenderawasih
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Physics Other

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ANALYZING THE LOGICAL REASONING ABILITIES OF PRE SERVICE CHEMISTRY TEACHER Lusia Narsia Amsad; Jukwati Jukwati; Dolfina C. Koirewoa
Biolearning Journal Vol 8 No 2 (2021): Biolearnig Journal (Juli 2021)
Publisher : Universitas Pendidikan Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (851.953 KB) | DOI: 10.36232/jurnalbiolearning.v8i2.1491

Abstract

Penelitian ini bertujuan untuk menganalisis kemampuan penalaran logis pada mahasiswa calon guru kimia. Kemampuan penalaran logis ini terkait dengan kemampuan yang mereka miliki dala menyelesaikan soal-soal tes kemampuan penalaran logis. Penelitian ini dilakukan pada mahasiswa calon guru kimia yang terdapat pada salah satu universitas negeri di Papua. Penelitian eksplanatori merupakan desain yang digunakan pada penelitian ini. Berdasarkan hasil penelitian terhadap kemampuan penalaran logis mahasiswa diketahui untuk kemampauan penalaran proporsional mahasiswa yang mencapai tahapan ini memiliki persentase terbesar sebanyak 75% dan yang paling rendah adalah penalaran probabilitas sebesar 46,88%. Untuk kategori penalaran logis, diketahui kemampuan penalaran logis mahasiswa Pendidikan kimia meliputi tiga (3) kategori penalaran logis yaitu kemampuan berpikir formal yang paling tinggi persentasenya sebesar 75%. Berdasarkan temuan penelitian diketahui masih ada mahasiswa yang memiliki level kemampuan berpikir konkret dan transisi sebesar 12,5%. Perlu dilakukan penelitian selanjutnya untuk meningkatkan kemampuan berpikir logis mahasiswa yang masih berada pada level konkret dan transisi.
Reaksi Hidrorengkah n-Heksadeka Menggunakan Katalis Nikel-Zeolit Alam Serta Penentuan Energi Aktivasi (Ea) dan Orde Reaksi Ilham Salim; Yohanes B.J. Rusmanta; Jukwati Jukwati
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 3 (2022): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i3.1514

Abstract

Research has been carried out on the preparation of active natural zeolite impregnated with nickel followed by activity testing through the hydrocracking catalytic reaction of n-Hexadecane. Active natural zeolite was obtained from PT Prima Zeolita Yogyakarta. The nickel concentration in the zeolite sample was carried out by ion exchange method with [Ni(NH3)6]2+ precursor solution with a concentration of 0.06M. The nickel content of the catalyst was determined by Atomic Absorption Spectrophotometer (AAS). The hydrocracking reaction used a fixed bed reactor system. Ratio of feed (n-Hexadecane) : catalyst = 3 : 1 (in gram). Catalysis study also carried out at various temperatures, from 315oC - 450oC at  certain nickel content.  The results of the catalytic reaction at each temperature after passing through the cooling system there was a liquid fraction that had been successfully accommodated then weighed and determined the percent of conversion. Furthermore, for the determination of Ea and the order of the reaction using linear regression calculations. The results showed that the catalytic reaction using an active natural Ni-Zeolite catalyst in the n-Hexadecane hydrocracking process resulted in different conversion results depending on the temperature of the catalytic reaction. The largest conversion was obtained at a temperature of 450oC, which was 35.18%. The reaction order was the first-order reaction (n=1). Meanwhile, the activation energy or activation energy (Ea) of the catalytic reaction in the n-Hexadecane hydrocracking process using a natural Ni-Natural zeolite catalyst with a nickel content of 2.0% (w/w) was 127.071 kJmol-1.
Co-Authors Dolfina Costansah Koirewoa Lusia Narsia Amsad Salim, Ilham Yohanes B.J. Rusmanta