ELEKTROKIMIA
Quiz
•
Chemistry
•
1st - 2nd Grade
•
Practice Problem
•
Medium
shokhifatul ilmiah
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15 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Bagan penulisan sel yang benar sesuai gambar di berikut adalah ….
Zn(s) / Zn2+(aq) // Ag+(aq) / Ag(s)
Zn2+(aq) / Zn(s) // Ag(aq) / Ag+(s)
Ag(s) / Ag+(aq) // Zn2+(aq) / Zn(s)
Ag(s) / Ag+(aq) // Zn(s) / Zn2+(aq)
Ag+(aq) / Ag(s) // Zn2+(aq) / Zn(s)
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
1. Diketahui potensial elektroda :
Ag- (aq) + e => Ag (s) E0 = + 0,80 volt
Ln3- (aq) + 3e => Ln (s) E0 = -0,34 volt
Mn2-(aq)+2e => Mg(s) E0 = -2,34 volt
Mn2- (aq) + 2e => Mn (s) E0 = -1,20 volt
Dua setengah sel di bawah ini yang potensialnya paling besar adalah ….
Ag/Ag+//Mg2+Mg
Mg/Mg2+//Ag+/Ag
Mn/Mn2+//Ln3+/Ln
Mn/Mn2+//Mg2+//Mg
Ag/Ag+//Ln2+/Ln
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. Diketahui potensial elektroda :
Cr3+(aq) + 3e => Cr(s) E° = -0,71 volt
Ag+(s) + e => Ag(s) E° = +0,80 volt
Al3+(aq) + 3e => Al(s) E° = -1,66 volt
Zn3+(aq) + 2e => Zn(s) E° = -0,74 volt
Pt2+(aq) + 2e => Pt(s) E° = +1,50 volt
Reaksi-reaksi yang berlangsung adalah ….
Zn3+(aq) + Pt(s) => Pt2+(aq) + Zn(s)
Ag(s) + Cr3+(aq) => Ag+(s) + Cr(s)
Al3+(aq) + Cr(s) => Al(s) + Cr3+(aq)
Pt(s) + Ag+(aq) => Ag(s) + Pt2+(aq)
Cr3+(aq) + Al(s) => Al3+(aq) + Cr(s)
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Pada elektrolisis larutan garam logam alkali atau alkali tanah tidak dihasilkan logamnya karena ….
sifat oksidatornya lemah
sifat reduktornya lemah
garam halidanya mempunyai titik leleh tinggi
ion logamnya tidak mengalami reduksi
energi ionisasi tinggi dari logam lain
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Perhatikan data dua macam sifat fisis unsur-unsur dalam tabel berikut!
Unsur dengan sifat oksidator terkuat adalah ….
P
Q
R
S
T
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Bahan yang digunakan sebagai elektrode pada sel aki (accu) adalah ….
Pt dan C
Zn dan C
Pb dan PbO
Zn dan Cu
Pb dan PbO2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada saat sel aki bekerja, reaksi yang terjadi pada katode adalah ….
Pb(s) + SO42-(aq) => PbSO4(s) + 2e
Pb2+ (aq) + 2e => Pb (s)
PbO2 (s) + 4H+ (aq) + SO42- (aq) + 2e => PbSO4 (s) + H2O (l)
Pb2+ (aq) + O2 (g) => PbO2 (s)
H2SO4 (aq) => 2H+(aq) + SO42- (aq)
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