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All Journal Chimica Didactica Acta : Journal of Chemistry and Chemistry Education JIPI (Jurnal IPA dan Pembelajaran IPA)
M Nasir
Universitas Syiah Kuala
Biochemistry, Genetics & Molecular Biology Chemistry Education Environmental Science Physics

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DEVELOPMENT OF SCIENTIFIC LITERRACY BASED MULTIPLE CHOICE QUESTIONS ON THE CONCEPT OF MOLE Ratnawati Ratnawati; M Nasir; Muhammad Nazar
Chimica Didactica Acta Vol 8, No 1 (2020)
Publisher : FKIP USK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (265.103 KB) | DOI: 10.24815/jcd.v8i1.25249

Abstract

Research has been conducted on "the development of multiple choice questions based on scientific literacy on the concept of mole material". The purpose of this study was to find out how to develop questions based on scientific literacy on the concept of the mole, how to test the validity, reliability of questions based on scientific literacy and how students respond / respond to multiple choice questions based on scientific literacy. The type of research used is research and development (R D) with a 4-D development model (define, design, develop, and disseminate). The target subjects in this study are Chemistry FKIP students. Data collection techniques using questionnaires, interviews and test results. The research instrument used was an interview sheet, a questionnaire sheet and a multiple choice question sheet based on scientific literacy with a total of 20 questions that had been validated by 2 validators. The results of qualitative data validity analysis from the validation of the items, the percentage of each was above 80% with very high criteria and declared valid and the questions were feasible to use. While the quantitative data validity analysis the resulting percentage as a whole is 65% low category, 25% moderate category and 10% high category with a reliability coefficient value of 0.828 including very high and reliable categories. The results of the analysis of the responses obtained an average value of 78, meaning that the 30 students were more dominant in giving a positive response to the questions.
Analisis Kadar Logam Timbal Dan Arsenik Dalam Tanah Dengan Spektrometri Serapan Atom M Nasir; Sulastri Sulastri; Michelia Mutiara Hilda
JIPI (Jurnal IPA dan Pembelajaran IPA) Vol 2, No 2 (2018): Desember 2018
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jipi.v2i2.12350

Abstract

Telah dilakukan penelitian tentang analisis logam berat timbal (Pb) dan arsenik (As) dalam tanah dengan menggunakan teknik spektrometri serapan atom. Penelitian ini bertujuan untuk menentukan kadar logam berat timbal dan arsenik dalam tanah kebun percobaan Fakultas Pertanian Universitas Syiah Kuala. Sampel pada penelitian ini yaitu tanah dari 3 kebun percobaan Fakultas Pertanian Universitas Syiah Kuala yang terdiri dari kebun percobaan 1, 2 dan 3. Sebagai pembanding menggunakan tanah dari kebun masyarakat dan tanah bebas pupuk dan pestisida. Destruksi sampel menggunakan pelarut HNO3 pekat. Pada suhu 175ºC pada tekanan 1 atm selama 26 menit, pengukuran kadar logam timbal dilakukan pada panjang gelombang 217,00 nm dan pengukuran kadar logam arsenik diukur pada panjang gelombang 193,70 nm dengan teknik Vapour Generator Hydride (VGH). Hasil penelitian menunjukkan bahwa pada ketiga lahan tanah kebun percobaan Fakultas Pertanian Universitas Syiah Kuala yaitu tanah kebun percobaan 1, 2, dan 3 tidak terdeteksi adanya logam berat timbal. Tanah pada kebun percobaan 2 dan 3 juga tidak terdeteksi adanya logam berat arsen. Tetapi terdeteksi pada tanah kebun percobaan 1 sebesar 1,6860 ppm (0,0001686%), kebun masyarakat sebagai pembanding yaitu sebesar 0,6607 ppm (0,00006607%) dan tanah kontrol yaitu sebesar 0,1822 ppm (0,00001822%). Mengacu pada nilai ambang batas standar dapat disimpulkan kadar logam ini masih dalam batas aman. 
Co-Authors Michelia Mutiara Hilda Ratnawati Ratnawati Sulastri Sulastri