
Redoks dan Elektrokimia 12-1
Quiz
•
Chemistry
•
1st - 10th Grade
•
Practice Problem
•
Hard
Purwaning Astuti
Used 266+ times
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16 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
2 mol KMnO4 akan tepat bereaksi dengan Na2C2O4 sebanyak .... mol menurut reaksi : KMnO4 (aq) + CaC2O4(aq) + HCl(aq) → MnCl2(aq) + KCl(aq) +CO2(g) + H2O(l)
1 mol
2 mol
3 mol
4 mol
5 mol
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
1. Perhatikan reaksi berikut : Zn(s) + NO3-(aq) + OH-(aq) → ZnO22- (aq) + NH3(g) + H2O(l) . Untuk mendapatkan 22,4 liter gas NH3 diperlukan logang seng sebanyak ...
261,2 gram
2 mol
4 liter
65,3 liter
3 mol
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Reaksi berikut yang merupakan reaksi yang setara adalah ...
A. Cu + 2NO3- + 2H+ → Cu2+ + 2NO2 + H2O
A. AsO2- + Br2 + 4OH- → 2 Br - + AsO43- + 2 H2O
A. 2MnO4- + 5Zn + 8H+ → 2 Mn2+ + 5 Zn2+ + 4 H2O
A. Cl2 + 3 IO- + 6 H+ → 2Cl- + 3 I- + 3 H2O
Cr2O72- + 7 H2O + 6 Cl- → Cr3+ + 3 Cl2 + 14 H+
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Perhatikan gambar berikut :
Pada saat sel volta tersebut beroperasi (aktif), pernyataan yang benar adalah ...
Elektron bergerak dari elektrode tembaga menuju elektrode Zink
Ion NO3- pada jembatan garam bergerak ke larutan Zn(NO3)2-
Massa elektrode tembagabertambah akibatterjadi reduksi
Konsentrasi ion Zn2+ di dalam elektrode berkurang karena mengalami reduksi
Arus listrik mengalir dari elektrode tembaga menuju elektrode seng
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui beberapa sel volta sebagai berikut :
Mg/ Mg2+// Ag+/Ag Eo sel = +3,17 Volt
Cd/ Cd2+// Ag+/Ag Eo sel = +1,20 Volt
Mn/ Mn2+// Cd2+/Cd Eo sel = +0,79 Volt
Cu/ Cu2+// Ag+/Ag Eo sel = +0,46 Volt
Logam yang paling kuat daya reduksinya adalah ....
Mg
Ag
Cu
Mn
Cd
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui data berikut :
Au/ Au3+// H+ (1M)/H2 Eo sel = +1,50 Volt
Au/ Au3+// Pb2+/Pb Eo sel = +1,63 Volt
Nilai potensial elektrode standart Pb2+/Pb adalah ...
- 3,12 Volt
- 0,13 Volt
+ 0,13 Volt
+ 2,12 Volt
+ 3,12 Volt
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Cara yang tepat untuk mencegah korosi pada kaleng kemasan adalah ...
Mengecat
Melumuri dengan oli
galvani
Tin plating
Dibalut dengan Plastik
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