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All Journal Sainstek : Jurnal Sains dan Teknologi Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat
Liza Devita
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Journal : Sainstek : Jurnal Sains dan Teknologi

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STUDI MOLEKUL n2P2 DENGAN GRUP SIMETRI D~h MENGGUNAKAN METODE AB INITIO Devita, Liza
Sainstek : Jurnal Sains dan Teknologi Vol 6, No 2 (2014)
Publisher : IAIN Batusangkar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (435.54 KB) | DOI: 10.31958/js.v6i2.112

Abstract

This research theoretically describes the molecule n2 p2 with cemetery group d-h using ab initio /STO-3 G that is included in the package of HyperChem Pro.6.0. this study also discusses the effect of atom toward electronic features and the structure that is formed from molecule n2 p2. Moreover, this research investigated the effect of cemetery group n1-P2 toward molecule stability n2 P2. Research findings revealed that loop n1-P2 or loop P2-P3 could be single loop, double loop, and even triple loop.  For the optimum result, the most stable molecule was CIP (E=993242,9375), that is the optimum result of CIPPCI. However, the most unstable molecule was PP (E=423494,6563), that is the optimum result of HPPH. In one group from top-down or in a period form left-right, total energy seems decrease.  In other words, n2 P2 was seen more stable. Key wordS :Ab initio, molekul n2P2, grup simetri D~h
PENGGUNAAN BEBERAPA PELARUT ORGANIK DALAM EKSTRAKSI BESI(III) DENGAN OKSIN SECARA EKSTRAKSI PELARUT Devita, Liza
Sainstek : Jurnal Sains dan Teknologi Vol 4, No 2 (2012)
Publisher : IAIN Batusangkar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (861.294 KB) | DOI: 10.31958/js.v4i2.74

Abstract

The research on the extraction of iron (III)  aims at finding the best condition of extraction of iron (III) using oksin (8-hidroksikuinolin) as the complement. It was done by setting the  oksin concentration, pH, and the appropriate solvent. The  extraction process was done in a separating funnel. The reaction occurs when the water phase containing ions of iron (III) contacted an organic phase containing oksin as a chelate ligand. The water phase was measured with atomic absorption Spectrophotometer.  The concentration of iron (III) in the organic phase extracted was obtained from the difference between the concentration of iron (III) with the initial concentration of iron (III) which was measured by atomic absorption spectrophotometer. As the result of the research, it was found that Fe-Oksinat was extracted optimally at pH 3, the concentration of iron (III) concentration of 10 ppm and oksin 0.12 M, with a 40-minute standing time and agitation time 20 min. Fe-oksinat for benzene solvent extracted optimum pH 3, the concentration of iron (III) concentration of 10 ppm and 0.12 M. oksin with a 20-minute standing time and mixing time 10 minutes. From the comparative figures of the comparison distribution at the optimum conditions for the three solvents (chloroform, ethyl acetate and benzene), it was obtained that the best solvent for the extraction of iron (III) with oksin as a completing agent is chloroform. Key words : solvent extraction, organic solvents, oksin, Iron (III)
Co-Authors Budi Suarti setiavani, gusti