
LATIHAN PAS KIMIA
Authored by Tati Rosmiati
Chemistry
12th Grade - University
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15 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Gas klorin (Cl2) yang ditambahkan ke dalam pengolahan air minum dan kolam renang bertujuan untuk membunuh bakteri. Reaksi pembentukan gas klorin adalah sebagai berikut:
2NaCl + 2H2O H2 + Cl2 + 2NaOH
Zat yang berperan sebagai oksidator adalah…
NaCl
H2O
H2
Cl2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Penulisan diagram sel yang tepat untuk menggambarkan proses tersebut adalah…
Cu/Cu2+∥2Ag+/2Ag
Cu/Cu2+∥Ag+/Ag
Cu2+/Cu∥2Ag/2Ag+
Cu2+/Cu∥Ag/Ag+
Cu2+/2Ag+∥Cu/2Ag
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Besarnya Eo sel adalah…
+0,46 V
+0,63 V
+1,14 V
+1,26 V
+1,94 V
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Perhatikan rangkaian sel elektrolisis Volta berikut:
Penulisan diagram sel elektrolisis paling tepat dari rangkaian tersebut adalah…
Cu/Cu2+∥Mg/Mg2+
Cu/Cu2+∥Mg2+/Mg
Mg/Mg 2+∥ Cu/Cu2+
Mg2+/Mg ∥ Cu/Cu2+
Mg/Mg 2+∥ Cu2+/Cu
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Perhatikan persamaan reaksi redoks berikut:
MnO2(s) + HCl(aq) MnCl2(aq) + Cl2(g) + H2O(l)
Jika disetarakan, maka koefisien dan adalah…
1, 2, 3 dan 1
1, 2, 2 dan 1
1, 2, 4 dan 1
1, 4, 1 dan 1
2, 4, 1 dan 1
6.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
Pada elektrolisis leburan Al2O3 diperoleh 0,225 gram logam aluminium (Ar = 27). Waktu yang diperlukan untuk mengendapkan aluminium tersebut jika arus yang digunakan 2 A adalah… detik
A
B
C
D
E
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Berikut ini beberapa usaha untuk pencegahan korosi:
1. pelapisan timah
2. galvanisir
3. paduan logam
4. pengecatan
5. pelapisan plastik
Pencegahan korosi pada kaleng makanan dapat dilakukan melalui proses…
1
2
3
4
5
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