
Pers Reaksi Redoks
Quiz
•
Chemistry
•
12th Grade
•
Hard
Siska Fz
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Setengah reaksi reduksi NO3– menjadi N2O adalah sebagai berikut.
a NO3–(aq) + b H+ + 8 e– ⎯⎯→ c N2O(g) + d H2O(l)
Nilai a dan b yang cocok adalah ….
2, 5
2, 10
, 1, 4
1, 5
3, 5
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Reaksi ion permanganat dan ion oksalat dalam larutan basa memiliki persamaan berikut.
MnO4– (aq) + C2O42–(aq) ⎯⎯→ MnO2(s) + CO32–(aq)
Jika persamaan ini disetarakan, jumlah ion OH– yang dibentuk adalah ….
nol
dua di kanan
dua di kiri
empat di kanan
empat di kiri
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Perhatikan wacana berikut!
Senyawa aktif pada pemutih adalah senyawa natrium hipoklorit (NaClO). Untuk menghitung kadar NaClO dalam pemutih digunakan reaksi
iodometri, yaitu:
NaClO(l) + 2KI(aq) + 2 HCl (aq) → NaCl(aq) + 2KCl(aq) + I2(l) + H2O(l)
I2(l) + 2Na2S2O3(aq) → 2NaI(ag) + Na2S4O6(aq)
Berdasarkan wacana tersebut, sifat kimia senyawa yang terdapat dalam pemutih adalah …
katalisator
reduktor
emulgator
oksidator
inhibitor
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Perhatikan persamaan reaksi :
K2Cr2O (s) + 14HCl (aq) --> 2KCl(aq) + 2CrCl3(aq) + 3Cl2 (g) + 7H2O(l).
Unsur-unsur yang mengalami perubahan bilangan oksidasi pada persamaan reaksi tersebut adalah ….
Cr dan Cl
K dan Cl
Cr dan H
H dan O
O dan Cl
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Setengah reaksi reduksi NO3– menjadi N2O adalah sebagai berikut.
a NO3–(aq) + b H+ + 8 e– ⎯⎯→ c N2O(g) + d H2O(l)
Nilai a dan b yang cocok adalah ….
2, 5
2, 10
, 1, 4
1, 5
3, 5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Koefisien dari a, b, c, d adalah 2, 5, 5, 2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Persamaan reaksi redoks:
aFe2+ + bMnO4- + cH+ → Fe3+ + Mn2+ + dH2O
Harga koefisien a, b, c, dan d berturut-turut adalah ....
5, 1,4, dan 2
5, 1,8, dan 4
5, 1,4, dan 8
5, 1,2, dan 4
4, 8,1, dan 5
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