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Quiz
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Chemistry
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12th Grade
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Practice Problem
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Medium
imanuel sihombing
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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
1. Pernyataan yang tepat tentang pembuatan logam alkali secara elektrolisis adalah……
dibuat dari elektrolisis lelehan garam kloridanya
digunakan katode karbon dan anode dari besi
ion logam alkali yang terbentuk berupa zat padat di anode
reduksi ion logam alkali terjadi di anode
logam alkali yang terbentuk berupa zat padat di anode
2.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
2. Pada elektrolisis larutan tembaga (II) sulfat dengan elektrode tembaga, di anode terjadi reaksi...
Cu2+ (aq) + 2e → Cu(s)
Cu(s) → Cu2+ (aq) + 2e
2H2O (l) + 2e → H2 (g) + OH- (aq)
2H2O (l) → 4H+ (aq) + O2 (g) + 4e
SO42- (aq) +H2O (l) → H2SO4 (aq)
3.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
3. Pada elektrolisis cairan MgCl2, pada katode dan anode berturut dibebaskan ...
H2 dan Cl2
H2 dan O2
Mg dan Cl2
Mg dan H2
Mg dan O2
4.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
4. Pada elektrolisis cairan Nnatrium klorida, pada katode dan anode berturut-turut dibebaskan ...
H2 dan Cl2
H2 dan O2
Na dan Cl2
Na dan H2
Na dan 02
5.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
5. Pada elektrolisis lelehan MgCl2 dengan elektrode grafit di katode akan dihasilkan?
Gas klorin
Gas hidrogen
Larutan Mg(OH)2
Logam Mg
Gas oksigen
6.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
6. Perhatikan proses elektrolisis berikut
1) Elektrolisis larutan NaCl dengan elektroda C.
2) Elektrolisis larutan AgNO3 dengan elektroda Pt.
3) elektrolisis leburan KI dengan elektroda Pb.
4) elektrolisis larutan K2SO4 dengan elektroda C.
Pasangan yang menghasilkan gas O2 di anoda ditunjukkan oleh nomor...
1 dan 2
1 dan 3
1 dan 4
2 dan 3
2 dan 4
7.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
7. Dalam sejumlah arus listrik yang sama ke dalam larutan NiSO4 dan CuCl2 membentuk endapan nikel sebanyak 5,9 gram jika Ar Ni = 59 dan Cu = 63,5. Maka massa endapan tembaga yang terbentuk adalah ...
31,8 g
59,0 g
63,5 g
118 g
127 g
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