sel volta
Quiz
•
Chemistry
•
12th Grade
•
Medium
Siti Afsoh, S.Pd.
Used 95+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Suatu sel volta ditulis dalam diagram sel sebagai berikut:
Cr (s)| Cr3+(aq) ∥ Cu2+ (aq)|Cu (s)
Persamaan reaksi dari notasi sel di atas adalah....
Cu2+(aq) + Cr (s) → Cu (s) + Cr3+ (aq)
Cu (s) + Cr3+ (aq) → Cu2+(aq) + Cr (s)
3 Cu2+(aq) + 2 Cr (s) → 3 Cu (s) + 2 Cr3+ (aq)
Cu2+(aq) + Cr (s) → Cu (s) + Cr2+ (aq)
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
1. Pada katode terjadi reaksi reduksi
2. Pada anode terjadi reaksi oksidasi
3. Pada sel volta, katode termasuk elektrode negative
4. Logam yang memiliki potensial lebih tinggi berperan sebagai elektrode positif
5. Logam yang memiliki potensial lebih rendah berperan sebagai elektrode negatif
Dari pernyataan di atas yang tidak sesuai dengan kaidah sel volta adalah ...
1
2
3
4
5
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jika diketahui :
Zn+2 / Zn Eo = –0, 76 Volt
Cu+2 / Cu Eo = +0,34 Volt
Maka besarnya potensial sel (Eo sel) Volta tersebut adalah ...
–0,42 Volt
–1,10 Volt
+0,42 Volt
+1,10 Volt
+11,0 Volt
4.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Diketahui potensial elektrode Seng dan tembaga sebagai berikut :
Zn2+ + 2e → Zn E͒ = -0,76 Volt
Cu2+ + 2e → Cu E͒ = +0,34 Volt
Besarnya Eosel agar reaksi dapat berlangsung adalah ....... Volt
-1,10
+1,10
+0,76
-0,76
+2,00
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Diketahui data potensial reduksi standar :
Zn2+ + 2e → Zn Eo = -0,76 V
Mg2+ + 2e → Mg Eo = -2,38 V
Cu2+ + 2e → Cu Eo = +0,34 V
Notasi sel yang dapat berlangsung spontan adalah....
Fe |Fe2+ ||Zn2+ |Zn
Zn |Zn2+ ||Mg2+ |Mg
Cu |Cu2+ ||Zn2+ |Zn
Cu |Cu2+ ||Fe2+ |Fe
Mg |Mg2+ ||Cu2+ |Cu
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sel volta terdiri dari elektrode perak dan tembaga, jika
Ag+ +e → Ag E0= +0,80 volt
Cu2+ +2e → Cu E0= +0,34 volt
Pernyataan di bawah ini yang benar adalah … .
Ag sebagai Anoda
Cu sebagai Katoda
Potensial selnya = 0,46
Elektroda Ag semakin tipis
Cu larut dalam air
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Diketahui elektroda :
E0= 0,79 volt
E0= -2,34 volt
Maka notasi sel yang terbentuk adalah … .
Ag+ / Ag // Mg2+ / Mg
Mg2+ / Mg // Ag / Ag+
Ag / Ag+ // Mg / Mg2+
Mg / Mg2+ // Ag+ / Ag
Ag+ / Ag // Mg /Mg2+
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