UH REdoks dan Sel Volta
Authored by Rajamuddin S
Chemistry
12th Grade
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5 questions
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1.
OPEN ENDED QUESTION
5 mins • 10 pts
Setarakanlah reaksi redoks dibawah ini dalam suasana asam
XeF2 + BrO3- --> Xe + HF + BrO4- ( suasana asam )
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2.
OPEN ENDED QUESTION
5 mins • 10 pts
Setarakanlah reaksi redoks berikut dengan metode biloks:
I2 + S2O32- --> S4O62- + 2I- ( suasana basa )
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3.
OPEN ENDED QUESTION
5 mins • 10 pts
Diketahui potensial standar untuk reaksi sel berikut ini :
Zn + Fe2+ --> Zn2+ + Fe E0 sel = +0,32 volt
Zn + 2Ag+ --> Zn2+ + 2Ag E0 sel = +1,56 volt
Fe + 2Ag+ --> Fe2+ + 2Ag E0 sel = +1,24 volt
Berdasarkan data di atas, urutkanlah ketiga logam tersebut berdasarkan
kekuatan reduktor yang menurun !
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4.
OPEN ENDED QUESTION
3 mins • 1 pt
Suatu sel volta terdiri dari elektroda-elektroda besi dan tembaga.
Fe2+ + 2e --> Fe E0 = -0,44 volt
Cu2+ + 2e --> Cu E0 = +0,34 volt
Tentukanlah
a. Reaksi selnya
b. Arah aliran elektron
c. Notasi sel
d. Sebagai elektroda katoda dan anoda
e. Nilai potensial sel elektroda
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5.
OPEN ENDED QUESTION
3 mins • 1 pt
Perhatikan diagram potensial sel volta disamping.
a. Sebagai anoda dan katoda
b. Gambarkan notasi selnya
c. Bagaimana arah aliran elektronnya
d. Tuliskan reaksi selnya
e. Nilai potensial selnya
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