
SEL ELEKTROKIMIA
Chemistry
12th Grade
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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Berdasarkan gambar di samping, notasi sel yang tepat untuk sel Volta tersebut adalah ….
Sn+2/Sn // Cu+2/Cu
Sn/Sn+2 // Cu+2/Cu
Cu+2/Cu // Sn+2/Sn
Cu/Cu+2 // Sn+2/Sn
Sn/Sn+2 // Cu/Cu+2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Diketahui potensian standar beberapa sel Volta berikut:
A/A+2 // B+2/B E0sel = +1,46 volt
C/C+2 // D+2/D E0sel = +0,10 volt
C/C+2 // B+2/B E0sel = +0,56 volt
Berdasarkan harga diatas harga potensial standar A/A+2 // D+2/D adalah …. volt
2,12
1,92
1,56
1,00
0,12
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Pada penyepuhan logam besi denggan emas digunakan larutan AuCl3 dan arus sebesar 2 A selama 30 menit. Massa emas yang mengendap di katoda sebesar …. gram. (Ar Au = 197)
197 x 2 x 30 x 60/ 3 x 96.500
197 x 3 x 30 x 60/ 2 x 96.500
3 x 96.500 x 30/ 197 x 2
197 x 30 x 60/ 96.500
197 x 2 x 30/ 3 x 96.500
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Elektrolisis larutan Ni(NO3)2 dan Pb(NO3)2 yang disusun secara seri mengahasilkan endapan Pb sebanyak 2,07 gram. Jika Ar Ni = 59 dan Ar Pb = 207, logam Ni yang mengendap adalah …. gram
0,59
0,87
4,14
6,21
1,17
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Pada elektrolisis larutan PbCl2 menggunakan elektroda inert, terbentuk endapan Pb sebanyak 4,14 gram (Ar Pb = 207). Volume gas yang dihasilkan di anode pada suhu 00C dan tekanan 1 atm adalah …. L
4,48
2,24
1,12
0,448
0,224
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Suatu sel volta memiliki elektroda kadimum (E0Cd+2/Cd = - 0,40 volt) dan platina (E0Pt+2/Pt = + 1,20 Volt). Pernyatan yang benar mengenai sel volta tersebut adalah ….
Notasi sel Pt/ Pt+2// Cd+2/Cd
Potensial selnya sebesar 1,60 volt
Platina bertindak sebagai anoda
Reaksi sel : Cd+2 + Pt → Pt+2 + Cd
Elektron mengalir dari platina ke cadmium
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Pada elektrolisis larutan CuSO4, dihasilkan gas oksigen sebanyak 1,12 liter. Jika pengukuran itu dilakukan pada keadaan standar, arus yang dialirkan sebnyak …. faraday
0,2
0,4
0,6
0,8
1,0
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