
bag 3 USP Kimia
Authored by Lina Yohana
Chemistry
9th - 12th Grade
Used 4+ times

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13 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Suatu reaksi redoks :
aBr2 (aq) + bOH– (aq) → cBrO3– (aq) + dBr–(aq) + eH2O (l)
Harga a, b, c dan a berturut-turut agar reaksi redoks di atas setara adalah ….
3, 6, 5, 1, 3
6, 1, 3, 5, 3
3, 6, 1, 5, 3
1, 5, 3, 6, 3
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Reaksi Redoks :
2KMnO4(aq) + 5H2C2O4(aq) + 3H2SO4(aq)→2MnSO4(aq) + 10CO2(g) + K2SO4(aq) + 8H2O(l)
Setengah reaksi oksidasi dari reaksi tersebut adalah . . . .
MnO4–(aq) + OH+(aq) + 5e → Mn2+(aq) + 4H2)(l)
MnO4–(aq) + 2H2O(aq) + 3e → MnO2 (s) + 4OH–(aq)
H2C2O4(aq) → 2CO2(g) + 2H+(aq) + 2e
CO2(g) + 2H+(aq) + 2e → H2C2O4(g)
2H2SO4(aq) → 2H2O(l) + 2SO2(g) + O2(g)
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
10. Perhatikan rangkaian sel Volta berikut!
Nomor gambar, notasi sel, dan harga Eo sel yang tepat adalah ....
1)
CuICu2+llPb2+lPb
E0 positif
2)
NiINi2+llZnlZn2+
E0 positif
2)
ZnlZn2+llCu2+lCu
E0 Negatif
1)
CuICu2+llPb2+lPb
E0 Negatif
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Diketahui potensial reduksi
Ca+2 (aq) + 2e- Ca(s) Eo = - 2,87 V
Mg+2(aq) + 2e- Mg(s) Eo = -2,37 V
Pb+2 (aq) + 2e- Pb(s) Eo = - 0,13 V
Ag+ (aq) + e- Ag(s) Eo = + 0,80 V
Reaksi berikut yang dapat berlansung spontan adalah…..
Ca+2 (aq) + Mg(s) --> Ca(s) + Mg+2 (aq)
Pb+2 (aq) + Mg(s) --> Pb(s) + Mg+2 (aq)
Pb+2 (aq) + Ag(s) --> Pb(s) + Ag+ (aq)
Mg+2 (aq) + Ag(s) --> Mg(s) + Ag+2 (aq)
Pb(s) + Ca+2(aq) --> Pb+2 (aq) + Ca(s)
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Reaksi yang terjadi di anoda adalah ... .
•Fe(s) --> Fe2+(aq)
•Fe2+(aq) à Fe(s)
•2H2O + 2e à H2(g) + 2OH-(aq)
•2H2O à 4H+(aq) + O2(g) + 2e-
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Diketahui harga potensial elektrode standar (E°) dari beberapa logam sebagai berikut :
Al3+(aq) / Al(s) E° = -1,66 Volt
Fe2+(aq) / Fe(s) E° = -0,44 Volt
Cu2+(aq) / Cu(s) E° = +0,34 Volt
Ag+(aq) / Ag(s) E° = +0,80 Volt
Dari data tersebut reaksi di bawah ini yang berlangsung spontan adalah … .
Fe + Ag+ → Fe2+ + Ag
Cu + Fe2+ → Cu2+ + Fe
Cu + Al3+ → Cu2+ + Al
Ag + Al3+ → Ag+ + Al
Ag + Cu2+ → Ag+ + Cu
7.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Larutan CuCl2 (Ar Cu=63,5) dielektrolisis menggunakan elektroda C dengan arus sebesar 10 ampere selama 30 menit. Logam Cu yang diendapkan di katode sebanyak....
1,48 gram
2,96 gram
5,92 gram
29,6 gram
59,2 gram
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