
Ujian KD 3.3 Kelas XII
Quiz
•
Chemistry
•
3rd Grade
•
Practice Problem
•
Hard
Rainal Panjaitan
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7 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Perhatikan persamaan reaksi redoks berikut:
aMnO2(s) + bHCl(aq) ® cMnCl2(aq) + dCl2(g) + H2O(l)
Jika disetarakan, maka koefisien dan adalah…
1, 2, 3 dan 1
1, 2, 2 dan 1
1, 2, 4 dan 1
1, 4, 1 dan 1
2, 4, 1 dan 1
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diagram sel yang paling tepat menggambarkan reaksi tersebut adalah…
Zn/Zn2+//Al3+/Al
Zn/Zn2+//Al/Al3+
Al/Zn//Al3+/Zn2+
Al/Al3+//Zn2+/Zn
Zn2+/Zn//Al/Al3+
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Berikut ini beberapa usaha untuk pencegahan korosi:
1. pelapisan timah
2. galvanisir
3. paduan logam
4. pengecatan
5. pelapisan plastik
Pencegahan korosi pada kaleng makanan dapat dilakukan melalui proses…
A. 1
B. 2
C. 3
D. 4
E. 5
1
2
3
4
5
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Pada elektrolisis AgNO3 dengan elektrode karbon digunakan muatan listriks 0,05 F. Banyaknya perak
(Ar Ag = 108) yang diendapkan pada katode adalah...
2,7 gram
5,4 gram
10,8 gram
21,6 gram
54,0 gram
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Logam A tidak dapat mendesak logam B dari larutannya, logam C tidak dapat mendesak logam B dari larutannya, logam C dapat mendesak logam A dari larutannya. Urutan potensial reduksi yang semakin negatif dari ketiga logam tersebut adalah…
A-B-C
A-C-B
C-B-A
B-C-A
C-A-B
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Pada elektrolisis larutan CuSO4 dihasilkan logam tembaga (Ar Cu = 63,5) sebanyak 12,7 gram. Pada keadaan standar, volum gas yang dihasilkan di anode sebanyak..
0,56 liter
1,12 liter
2,24 liter
4,48 liter
11,20 liter
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Diketahui data pontensial sel standar:
Ag+(aq) + e- ® Ag(s) Eo = +0,80 volt
Zn2+(aq) + 2e- ® Zn(s) Eo = -0,76 volt
In3+(aq) + 3e- ® In(s) Eo = -0,34 volt
Mn2+(aq) + 2e- ® Mn(s) Eo = -1,20 volt
Reaksi redoks di bawah ini yang dapat berlangsung spontan adalah…
Zn(s) + Mn2+(aq) ® Zn2+(aq) + Mn(s)
3Ag(s) + In3+(aq) ® 3Ag+(aq) + In(s)
2In(s) + 3Mn2+(aq) ® 2In3+(aq) + 3Mn(s)
3Zn(s) + 2In3+(aq) ® 3Zn2+(aq) + 2In(s)
2Ag(s) + Mn2+(aq) ® 2Ag+(aq) + Mn(s)
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