
SEL ELEKTROLISIS
Authored by Asih Sukma
Chemistry
3rd Grade

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10 questions
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1.
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1 min • 1 pt
Berapa gram kalsium yang dapat dihasilkan dari elektrolisis lelehan CaCl2 dengan elektroda grafit selama satu jam jika digunakan arus 10 A? (Ar Ca = 40)
2.
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1 min • 1 pt
Sejumlah arus listrik alirkan melalui larutan AgNO3 dan larutan CuSO4 . Bila logam perak yang diendapkan sebanyak 21, 6 gram, berapa gram logam tembaga yang diendapkan?
3.
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1 min • 1 pt
Dalam sejumlah arus listrik yang sama ke dalam larutan NiSO4 dan CuCl2 membentuk endapan nikel sebanyak 5,9 gram jika Ar Ni = 59 dan Cu = 63,5. Maka massa endapan tembaga yang terbentuk adalah …
4.
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1 min • 1 pt
Pada proses elektrolisis lelehan NaCl dengan elektroda karbon digunakan Arus sebesar 10 ampere selama 1 menit, massa logam natrium yang diperoleh adalah.... (Ar Na = 23, Cl = 35,5)
5.
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1 min • 1 pt
Larutan nikel II sulfat di elektrolisis dengan arus searah besar 1,93 ampere. Jika pada katoda diendapkan logam nikel sebesar 0,58 gram waktu yang diperlukan untuk proses tersebut adalah... (Ar Ni = 58)
6.
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1 min • 1 pt
Jumlah Faraday yang diperlukan untuk mereduksi 60 gram ion kalsium menjadi logam kalsium Ar Ca = 40 adalah....
7.
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1 min • 1 pt
Kedalam 2 sel elektrolisis yang mengandung larutan ZnSO4 dan larutan CuSO4 yang dihubungkan secara seri dialirkan arus listrik ternyata diendapkan 1 gram seng. Jika Ar Zn = 65 dan Ar Cu= 63,5 banyaknya tembaga yang mengendap adalah..
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