Ratnawati, Dewi (2018) Analisis Besi Melalui Optimasi Kemampuan Agen Pereduksi Na2S2O3, NH2OH.HCl dan Na2C2O4 untuk Mereduksi Besi (III) Menjadi Besi (II). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini bertujuan untuk mengetahui aktivitas optimum pereduksi Na2S2O3,NH2OH.HCl dan Na2C2O4 yang meliputi pH, waktu dan konsentrasi. Panjang gelombang maksimum untuk masing-masing pereduksi diperoleh sebesar 510 nm. Optimasi pH buffer kondisi asam untuk pereduksi Na2S2O3 dan NH2OH.HCl diperoleh pada pH 4,5. Sedangkan optimasi pH buffer kondisi asam untuk pereduksi Na2C2O4 diperoleh pada pH 5. Selanjutnya optimasi waktu pendiamaan untuk pereduksi Na2S2O3 dan NH2OH.HCl diperoleh pada waktu 15 menit dan optimasi waktu pendiamaan untuk pereduksi Na2C2O4 diperoleh pada waktu 45 menit. Konsentrasi optimum untuk pereduksi Na2S2O3 dan NH2OH.HCl diperoleh sebesar 11 ppm dan 8 ppm. Konsentrasi optimum untuk pereduksi Na2C2O4 diperoleh sebesar 12 ppm. Selanjutnya persen Perolehan Kembali pereduksi Na2S2O3, NH2OH.HCl, dan Na2C2O4 masing-masing sebesar 87,68% 116,007 % dan 85,97 %.
============ This research aims to determine the optimum process of reducing agent Na2S2O3, NH2OH.HCl dan Na2C2O4 which includes pH, time and concentration. The maximum wavelength for each reducing agent was obtained at 510 nm. The optimum pH of acetate buffer for Na2S2O3 and NH2OH.HCl were at pH 4,5. While the optimum pH of acetate buffer for Na2C2O4 was at pH 5. Furthermore, the optimum time for Na2S2O3 and NH2OH.HCl were at 15 minute and optimum time for Na2C2O4 was at 45 minute. The optimum concentration for Na2S2O3 and NH2OH.HCl were at 11 and 8 ppm. The optimum concentration for Na2C2O4 was at 12 ppm. Furthermore, percent recovery of Na2S2O3, NH2OH.HCl, and Na2C2O4 were 87,69%,116,007 % and 85,97 % respectively.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSKi 543.085 8 Rat a |
| Uncontrolled Keywords: | Fe(II)-fenantrolin; Na2S2O3; NH2OH.HCl; Na2C2O4; 1,10-fenantrolin; Spektrofotometer UV-Vis |
| Subjects: | Q Science Q Science > QD Chemistry Q Science > QD Chemistry > QD75.2 Chemistry, Analytic |
| Divisions: | Faculty of Natural Science > Chemistry > 47201-(S1) Undergraduate Thesis |
| Depositing User: | Ratnawati Dewi |
| Date Deposited: | 23 Jul 2018 03:20 |
| Last Modified: | 21 Apr 2021 07:35 |
| URI: | http://repository.its.ac.id/id/eprint/52972 |
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