
elektrokimia
Authored by Bertha Setyaningsih
Chemistry
1st - 3rd Grade
Used 5+ times

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30 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Gambar di bawah menunjukkan susunan gambar bagi elektolisis larutan natrium sulfat 0.01 mol dm-3 menggunakan elektroda-elektroda karbon. Antara berikut yang manakah hasil terbentuk pada P dan Q?
P= Hidrogen gas, Q= Oksigen gas
P= Oksigen gas, Q= Natrium logam
P= Oksigen gas, Q= Hidrogen gas
P= Sulfir dioksida gas, Q= Natrium logam
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Arus elektrik dialirkan melalui larutan akueus kuprum (II) sulfat, CuSO4 seperti seperti ditunjukkan dalam rajah dibawah. Apakah yang terbentuk di anod?
Hidrogen
Oksigen
Kuprum
Sulfur
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Jumlah muatan listrik yang diperlukan untuk mereduksi 60 gram ion kalsium menjadi logam kalsium adalah .... (Ar Ca = 40)
1,0 F
1,5 F
2,0 F
2,5 F
3,0 F
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada elektrolisis leburan BaCl2 dengan elektrode grafit, di katode akan dihasilkan ....
gas klor
gas hidrogen
larutan Ba(OH)2
logam Ba
gas oksigen
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada elektrolisis larutan CrCl3 dengan menggunakan elektrode platina, di anode akan menghasilkan ....
gas Cl2
gas H2
gas O2
logam Cr
air
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada penyepuhan cincin tembaga dengan emas digunakan larutan AuCl3 (Ar Au = 197). Pengrajin perhiasan menyepuh cincin tembaga dengan emas selama 9650 detik dengan arus 3 Ampere. Massa emas yang digunakan untuk melapisi cincin tembaga sebanyak ... gram.
1,97
3,94
7,88
19,70
39,40
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Dalam proses elektrolisis, arus listrik sebanyak 1930 C dilewatkan dalam leburan zat elektrolit dan mengendap 1,5 gram unsur X pada katode. Jika diketahui bahwa Ar X = 150 dan tetapan Faraday = 96500 C, maka ion dari unsur X adalah. . .
X+
X-
X2+
X2-
X4+
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