
Quiz Redoks dan Sel Volta
Authored by noyten SAKTI
Chemistry
12th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Cd karena mengalami kenaikan bilangan oksidasi
NiO2 sebab mengalami kenaikan bilangan oksidasi
H2O karena mengalami kenaikan bilangan oksidasi.
Cd karena mengalami penurunan bilangan oksidasi
NiO2 sebab mengalami penurunan bilangan oksidasi
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Gas klor dapat dibuat melalui reaksi redoks :
aK2Cr2O7 + 14 HCl → 2KCl + bCrCl3 + cCl2 + dH2O
Setelah disetarakan nilai koefisien a,b,c dan d adalah.............................
2, 1, 2, 7
1, 2, 1, 7
2, 2, 3, 7
1, 2, 2, 7
1, 2, 3, 7
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diantara reaksi dibawah ini yang merupakan reaksi redoks adalah…..
AgNO3 + NaCl → AgCl + NaNO3
2KI + Cl2 → I2 + 2KCl
NH3 + H2O --> NH4+ + OH-
CH3COOH + NaOH → CH3COONa + H2O
Al2O3: + 2NaOH → 2NaAlO3 + H2O
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui reaksi setengah sel : Ag+ + e → Ag Eo= +0,80 V
Cu2+ + 2e → Cu Eo= +0,34 V
Penulisan diagram sel (notasi sel) yang paling tepat dan harga Eosel untuk menggambarkan proses tersebut adalah…..
Cu/Cu2+ // Ag+/Ag
Eosel = + 1,94 V
.
Cu2+/Cu // Ag/Ag
Eosel = + 1,26 V
Cu/Cu2+ // Ag+/Ag
Eosel = + 0,46 V
Cu2+/Cu // Ag/Ag+
Eosel = + 1,14 V
Cu2+/2Ag+ // Cu/2Ag
Eosel = + 0,63 V
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Gas Cl2 dialirkan dalam larutan NaBr sehingga terjadi reaksi redoks: Cl2 + 2Br- → 2Cl- + Br2
Jika diketahui : Cl2/Cl- Eo = +1,36 volt
Br2/Br- Eo = +1,07 volt
Dalam suatu sel volta dengan menggunakan elektroda Pt ,proses yang terjadi adalah :
1) Pada katoda terjadi oksidasi 2Br- → Br2 + 2e
2) Pada katoda terjadi reduksi Cl2 + 2e → 2Cl-
3) Pada kawat penghubung,electron bergerak dari katoda ke anoda.
4) Potensial sel yang dihasilkan 0,29 volt.
Pernyataan diatas yang benar adalah :
1, 2 dan 3
3 dan 4
2 dan 4
1 dan 3
1, 2, 3 dan 4
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui notasi sel volta: Mg|Mg2+||Sn2+|Sn, E = 2,23 volt. Gambar sel volta berdasarkan notasi sel tersebut adalah ….
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Perhatikan potensial elektroda standar berikut!
Cr3+ (aq) + 3e → Cr(s) Eo = -0,71 volt
Ag+ (aq) + e → Ag(s) Eo = +0,80 volt
Al3+ (aq) + 3e → Al(s) Eo = -1,66 volt
Zn2+ (aq) + 2e → Zn(s) Eo = -0,74 volt
Diagram sel yang dapat berlangsung spontan adalah ….
Ag/Ag+//Zn2+/Zn
Zn/Zn2+//Al3+l/Al
Ag/Ag+//Cr3+/Cr
Zn/Zn2+//Ag+/Ag
Cr/Cr3+//Al3+/Al
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