
untitled
Quiz
•
Chemistry
•
11th - 12th Grade
•
Practice Problem
•
Hard
Ade Wahyu
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20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
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
2.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
1. Pada katoda terjadi reaksi reduksi
2. Pada anoda terjadi reaksi oksidasi
3. Pada sel volta, katoda termasuk elektroda negatif
4. Logam yang memiliki energi potensial lebih tinggi berperan sebagai elektroda positif
5. Logam yang memiliki energi potensial lebih rendah berperan sebagai elektroda negatif
Dari pernyataan di atas yang tidak sesuai dengan teori sel volta adalah ....
1
2
3
4
5
3.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
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
3 mins • 5 pts
Perhatikan gambar berikut!
Yang bukan termasuk contoh sel Volta yang digunakan dalam kehidupan sehari-hari adalah ....
5.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Dalam suatu sel volta terjadi reaksi:
Cu + 2Ag+ → Cu2+ + 2Ag
Jika diketahui:
E0 Cu2+/Cu = +0,34 volt
E0 Ag+/Ag = +0,80 volt
maka potensial standar sel (Eo Sel) tersebut adalah .…
+1,14 volt
-0,66 volt
-0,46 volt
+0,46 volt
+4,6 volt
6.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Mn2+(aq) + 2e- → Mn (s) Eo = -1,18 V
Ni2+(aq) + 2e- → Ni (s) Eo = -0,28 V
Jika kedua sel tersebut terjadi reaksi, maka sel volta tersebut akan menghasilkan potensial sel sebesar ....
+ 0,90 V
– 0,90 V
+ 1,46 V
– 1,46 V
+14,6 V
7.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Perhatikan Gambar tentang sel volta tersebut!
Diketahui harga potensial berikut:
Ag+ + e- → Ag Eo = +0,80 volt
Zn2+ + 2e- → Zn Eo = -0,76 volt
Berdasarkan gambar di atas, harga potensial sel (E° Sel) adalah ....
-1,56 volt
-0,84 volt
+0,04 volt
-0,04 volt
+1,56 volt
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