
SEL VOLTA DAN KOROSI-UH 2
Authored by Era Pd.
Chemistry
12th Grade
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Penulisan lambang sel yang tepat dari gambar sel tersebut adalah . . .
Cu(s) | Cu2+(aq) || Zn(s) | Zn2+(aq)
Zn(s) | Zn2+(aq) || Cu2+(s) | Cu (aq)
Cu2+(s) | Cu(aq) || Zn2+(s) | Zn(aq)
Zn2+(s) | Zn(aq) || Cu(s) | Cu2+ (aq)
Zn(s) | Zn2+(aq) || Cu(s) | Cu2+ (aq)
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui data potensial reduksi berikut:
E0 Ca2+|Ca = -2,87 V
E0 Mg2+|Mg = -2,37 V
E0 Pb2+|Pb = -0,13 V
E0 Au2+|Au = +1,50 V
Reaksi yang dapat berlangsung adalah . . .
Mg(s) + Ca2+(aq) -> Mg2+(aq) + Ca(s)
Pb(s) + Mg2+(aq) -> Pb2+(aq) + Mg(s)
Pb+(aq) + Au3+(aq) -> Pb(s) + Au(s)
Ca(s) + Mg(s) -> Ca2+(aq) + Mg2+(aq)
Mg(s) + Pb2+(aq) -> Mg2+(aq) + Pb(s)
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui potensial reduksi:
Fe2+(aq) + 2e- -> Fe(s) E0 = -0,44 V
Al3+(aq) + 3e- -> Al(s) E0 = -1,66 V
maka potensial sel untuk reaksi:
3Fe2+(aq) + 2Al(s) -> 3Fe(s) + 2Al3+(aq) adalah . . .
-1,22 V
+1,22 V
+2,0 V
-2,0 V
-2,1 V
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui potensial reduksi standar:
Fe3+|Fe = +0,77 V
Cu2+|Cu = +0,34 V
Zn2+|Zn = -0,76 V
Mg2+|Mg = -2,37 V
Di antara reaksi berikut yang memiliki potensial sel terbesar adalah . . .
Zn(s) + Cu2+(aq) -> Zn2+(aq) + Cu(s)
Zn(s) + 2Fe3+(aq) -> Zn2+(aq) + 2Fe2+(aq)
Mg(s) + 2Fe3+(aq) -> Mg2+(aq) + 2Fe2+(aq)
Cu(s) + Mg2+(aq) -> Cu2+(aq) + Mg(s)
2Fe2+(s) + Cu2+(aq) -> 2Fe3+(aq) + Cu(s)
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui potensial standar untuk reaksi sel berikut:
Zn(s) + Fe2+(aq) -> Zn2+(aq) + Fe(s) E sel = 0,32 V
Zn(s) + Ag+(aq) -> Zn2+(aq) + Ag(s) E sel = 1,56 V
Fe(s) + Ag2+(aq) -> Fe2+(aq) + Ag(s) E sel = 0,24 V
Berdasarkan data potensial tersebut, dapat disimpulkan bahwa urutan ketiga logam tersebut berdasarkan kekuatan pereduksi yang semakin menurun adalah . . .
Ag, Fe, Zn
Ag, Zn, Fe
Fe, Zn, Ag
Fe, Ag, Zn
Zn, Fe, Ag
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Gas-gas buangan industri yang dapat menyebabkan korosi adalah . . .
O2, N2
CO, N2
CO2, CO
CO, H2O
SO2, NO2
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Diketahui potensial elektrode standar (E0) unsur-unsur:
P2+(aq) + 2e- -> P(s) E0 = -2,37 V
Q3+(aq) + 3e- -> Q(s) E0 = -1,66 V
R2+(aq) + 2e- -> R(s) E0 = -0,28 V
Fe2+(aq) + 2e- -> Fe(s) E0 = -0,44 V
S2+(aq) + 2e- -> S(s) E0 = -0,13 V
T2+(aq) + 2e- -> T(s) E0 = +0,34 V
P
Q
R
S
T
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