Reaksi Redoks dan Sel Volta

Quiz
•
Chemistry
•
12th Grade
•
Easy
Rajamuddin Sidabalok
Used 1+ times
FREE Resource
5 questions
Show all answers
1.
OPEN ENDED QUESTION
10 mins • 10 pts
Setarakanlah reaksi redoks dibawah ini dengan metode setengah reaksi
a. MnO4- + SO32- --> Mn2+ + SO42- ( suasana asam )
b. As2O3 + Zn --> AsH3 + ZnO22- ( suasana basa )
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2.
OPEN ENDED QUESTION
10 mins • 10 pts
Setarakan reaksi berikut dengan cara metode bilangan oksidasi ( Biloks )
a. Fe2+ + MnO4- --> Fe3+ + Mn2+ ( suasana asam )
b. P4 --> PO43- + PH3 ( suasana basa )
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3.
OPEN ENDED QUESTION
10 mins • 10 pts
Sebanyak 50 mL larutan SO2 dititrasi dengan larutan KBrO4 0,1 M menurut reaksi:
KBrO4 + 4SO2 + 4H2O --> 4H2SO4 + KBr
Titik ekivalensi tercapai saat volume KBrO4 yang digunakan sebanyak 50 mL.
Tentukanlah a. Konsentrasi SO2 b. Jumlah mol elektron yang terlibat dalam reaksi
c. pH larutan setelah titrasi.
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4.
OPEN ENDED QUESTION
10 mins • 10 pts
Dari tiga logam X, Y dan Z diperolah data sebagai berikut :
(1) Logam Y dan Logam Z dapat membebaskan gas hidrogen dari larutan HCl
(2) Logam X dapat mengendapkan logam Y dari larutan garamnya
(3) Hanya logam Z yang dapat membebaskan hidrogen dari air.
Bagaimanakah urutan ketiga logam tersebut dalam deret Volta ?
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5.
OPEN ENDED QUESTION
10 mins • 10 pts
Suatu sel volta tersusun dari elektroda-elektroda timah dan aluminium
Sn2+ + 2e --> Sn E0 = -0,14 volt
Al3+ + 3e --> Al E0 = -1,66 volt
a. Tentukan anoda dan katoda
b. Gambarkan diagram sel ( Notasi sel )
c. Bagaimana arah aliran elektron
d. Tuliskan reaksi sel
e. Hitunglah potensial listrik yang dihasilkan sel.
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