Pengaruh temperatur dan rapat arus terhadap deposit Cr pada katoda Cu.

Kusnendar , Bram (1996) Pengaruh temperatur dan rapat arus terhadap deposit Cr pada katoda Cu. Undergraduate thesis, FMIPA UNDIP.

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Abstract

Pendeposisian krom dari larutan asain kromat dengan metoda elektrolisis telah dilakukan. Ko9disi prose dibuat sebagai berikut,2rapat anus 1,25 A/dm , 5 A/cim , 8,75 A/ dm , 12,5 A/din , dengan variasi temperatur 25 C, 35 °C. 45 °C. Hasil pendeposisian dinyatakan sebagai efisiensi arus katoda yaitu perbandingan jumlah substansi yang diubah, ma., terhadap jumlah substansi yang bereaksi apabila semuanya diberikan oleh reaksi. Dari percobaan yang dilapkan diperoleh deposit terbesar pada rapat arus 12,5 A/dm ,temperatur 25 C dengan efisiensi anus 15.9 sedangkan deposit terkecil pada rapat arias 5 A/dm , temperatur 45 C dengan efisiensi arus 5,4 %. Pada rapat arus yang lebih tinggi, massa yang terdeposit akan semakin meningkat. Electrodeposition of Chromium from chromic acid by electrolysis method has been done. Condition of processes was made as follow current density 1,25 A/dm2, 5 A/dm2, 8,75 A/dm2, 12,5 A/dirt2, with temperature variation 25 °C, 35 °C, 45 °C. Electrodeposition product is defined as the efficiency current of cathode i.e. ratio of the amount of the converted substance, ma, to the amount of the substance that would react if the whole amount to accomplish the given reaction, mb From this research, maximum deposit was obtained at current density 12,5 ° A/dm2,temperaIure 25 C with current efficiency 15,9 % and minitiut deposit was obtained at current density 5 A/dm2 , ° temperature 45 C with current efficiency 5,4 % . At higher current density, deposit mass will be increase. This document is Undip Institutional Repository Collection. The author(s) or copyright owner(s) agree that UNDIP-IR may, right owner(s) also agree that UN' 1V

Item Type:Thesis (Undergraduate)
Subjects:Q Science > QD Chemistry
Divisions:Faculty of Science and Mathematics > Department of Chemistry
ID Code:30627
Deposited By:Mr UPT Perpus 1
Deposited On:03 Nov 2011 12:42
Last Modified:03 Nov 2011 12:42

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