
Hukum Faraday_7
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Chemistry
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12th Grade
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Medium
Susi Respati Setyorini
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1 Slide • 5 Questions
1
Hukum Faraday_7
by Respati 27
2
Multiple Choice
Arus listrik yang besarnya sama dialirkan melalui larutan CuCl2 dan CrCl3, jika Cr yang mengendap = 1,4 gram, massa Cu yang mengendap adalah ….(Ar Cu=63,5; Cr= 52 )
0,128 g
0,256 g
0,85 g
2,56 g
1,28 g
3
Multiple Choice
Berapa waktu yang diperlukan untuk mengendapkan 5 gram seng di katoda jika ke dalam sel yang berisi larutan seng sulfat dialirkan arus listrik sebesar 10 ampere? (Ar Zn = 65)
5 menit
10 menit
25 menit
27 menit
49 menit
4
Multiple Choice
Larutan CuCl2 (Ar Cu=63,5) dielektrolisis menggunakan elektroda C dengan arus sebesar 5 ampere selama 30 menit. Logam Cu yang diendapkan di katode sebanyak....
1,48 gram
2,96 gram
5,92 gram
29,6 gram
59,2 gram
5
Multiple Choice
Arus listrik (faraday) yang diperlukan untuk mereduksi 60 gram ion kalsium menjadi logam kalsium . Diket Ar Ca=40
1,0 Faraday
1,5 Faraday
2,0 Faraday
3,0 Faraday
4,0 Faraday
6
Multiple Choice
Pada penyepuhan cincin tembaga dengan emas digunakan larutan AuCl3 (Ar Au = 197 g/mol). Pengrajin perhiasan menyepuh cincin tembaga dengan emas selama 9650 detik dengan arus 3 Ampere. Massa emas yang digunakan untuk melapisi cincin tembaga sebanyak ... gram
197
3,94
7,88
19,70
39,40
Hukum Faraday_7
by Respati 27
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