Apabila arus listrik yang dialirkan sebesar 0,5 faraday dialira dalam larutan NiSO4 (Ar Ni = 59), maka massa logam nikel yang mengendap di katoda seberat ....

AFB Kimia Semester Ganjil 2024

Quiz
•
Chemistry
•
10th Grade
•
Easy
Mujahidin Mujahidin
Used 1+ times
FREE Resource
25 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
2,95 gram
7,34 gram
14,75 gram
D. 29,5 gram
E. 59,0 gram
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Arus sebesar 1,5 ampere selama 10 menit dialirkan ke dalam larutan Cu(NO4)2 1 M dengan elektroda Pt. Massa endapan yang terbentuk dikatoda ..... gram (Ar Cu=63,5)
63,5 x 1,5 x 10 / 96500
63,5 x 1,5 x 10 / (2 x 96500)
63,5 x 1,5 x 10 x 60 / 96500
63,5 x 1,5 x 10 x 60 / (2 x 96500)
63,5 x 2 x 1,5 x 10 / 96500
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Data harga Eo dari Co = - 0,28 volt, Pb = - 0,13 volt, Sn = - 0,14 volt, Mg = - 2,37 volt, Ag = +0,80 volt, Fe = - 0,44 volt. Logam yang dapat mencegah terjadinya korosi pada besi dengan cara proteksi katodik adalah….
Co
Pb
Sn
Mg
Ag
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Diketahui elektrode-elektrode berikut:
Ni2+ + 2e → Ni Eo = - 0,25 volt
Co2+ + 2e → Co Eo = - 0,28 volt.
Diagram sel volta yang tepat adalah…
Ni | Ni2+ || Co2+ | Co
Ni2+ | Ni || Co2+ | Co
Co2+ | Co || Ni | Ni2+
Co | Co2+ || Ni2+ | Ni
Co | Ni || Ni2+ | Co2+
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Diketahui elektrode-elektrode berikut:
Ni2+ + 2e → Ni Eo = - 0,25 volt
Co2+ + 2e → Co Eo = - 0,28 volt.
Besar nilai potensial reduksi sel yang tepat dari sel volta di atas adalah….volt
+0,03
+0,53
-0,53
-0,03
tidak dapat terjadi
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Diketahui:
19K+ + e– → 19K Eo = -2,92 V
47Ag+ + e–→ 47Ag Eo = +0,80 V
Diagram selnya adalah ….
K+ | K || Ag| Ag+
K | K+|| Ag+| Ag
Ag | Ag+|| K+| K
Ag+ | Ag || K| K+
K | K+|| Ag| Ag+
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Diketahui:
19K+ + e– → 19K Eo = -2,92 V
47Ag+ + e–→ 47Ag Eo = +0,80 V
Nilai Eo selnya adalah …. volt
-2,12
+2,12
+3,72
-3,72
+1,12
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