Sel Elektrokimia
Authored by Siti Pratiwi
Chemistry
12th Grade
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1.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Sel elektrokimia yang melibatkan sumber arus listrik adalah ....
2.
FILL IN THE BLANK QUESTION
3 mins • 2 pts
Pada percobaan sel volta digunakan dua elektroda Pb dan Ni menghasilkan potensial sel sebesar +0.12 volt. Jika diketahui potensial reduksi Ni2+(aq) + 2e- ↔ Ni(s) E0= -0.23 volt
Maka potensial reduksi Pb sebesar…
3.
FILL IN THE BLANK QUESTION
3 mins • 2 pts
Jika diketahui :
Mg + 2Ag+ → Mg2+ + 2Ag E0 = +3,12 V
Ag+ + e → Ag E0 = +0,80 V
Cu2+ + 2e → Cu E0 = +0,34 V
Mg + Cu2+ → Mg2++Cu
Maka potensial standar untuk reaksi di atas adalah ....
4.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
Diketahui harga potensial electrode (E0) berikut:
Cd2+(aq) + 2e- ↔ Cd(s) E0=-0.40 volt
Zn2+(aq) + 2e- ↔ Zn(s) E0=-0.76 volt
Ni2+(aq) + 2e- ↔ Ni(s) E0= -0.23 volt
Urutan daya pengoksidasi (oksidator) mulai dari yang lemah ke yang kuat adalah…
Cd>Zn>Ni
Cd>Ni>Zn
Ni>Cd>Zn
Zn>Ni>Cd
5.
MULTIPLE CHOICE QUESTION
5 mins • 3 pts
Dari data potensial reduksi berikut:
F2(g) + 2e- ↔ 2F-(aq) E0=+2.87 volt
Cl2(g) + 2e- ↔ 2Cl-(aq) E0=+1.36 volt
Br2(g) + 2e- ↔ 2Br-(aq) E0=+1.07 volt
I2(g) + 2e- ↔ 2I-(aq) E0=+0.54 volt
2Ag+(aq) + 2e- ↔ 2Ag(s) E0=+0.80 volt
Reaksi yang dapat berlangsung secara spontan adalah…
2Ag(s) + 2Br-(aq) ↔ 2Ag+(aq) + Br2(g)
2Ag+(aq) +2I-(aq) ↔ 2Ag(s) + I2(g)
2Ag(s) + 2F-(aq) ↔ 2Ag+(aq) + F2(g)
2Ag(s) + 2Cl-(aq) ↔ 2Ag+(aq) + Cl2(g)
6.
MULTIPLE CHOICE QUESTION
1 min • 2 pts
Mg2+ (aq) + 2e → Mg (s) Eo = −2,38 volt
Al3+ (aq) + 3e → Al (s) Eo = −1,66 volt
Notasi sel reaksi yang dapat berlangsung adalah....
Mg | Mg2+ || Al3+ | Al
Mg2+ | Mg || Al | Al3+
Mg | Mg2+ || Al | Al3+
Al | Al3+ || Mg2+ | Mg
7.
MULTIPLE CHOICE QUESTION
3 mins • 3 pts
Diketahui potensial elektrode perak dan tembaga:
Ag+ + e → Ag E0 = + 0,80 V
Cu2+ + 2 e → Cu E0 = + 0,34V
Maka reaksi selnya adalah…
Ag+ + Cu → Ag + Cu2+
2Ag+ + Cu→ 2Ag + Cu2+
Ag + Cu2+ → Ag+ + Cu
2Ag + Cu2+→ 2Ag+ + Cu
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