SEL VOLTA
Flashcard
•
Chemistry
•
12th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
Diketahui data potensial standar berikut : Zn2+(aq) + 2 e → Zn(s) E° = - 0,76 volt Cu2+(aq) + 2 e → Cu(s) E° = + 0,34 volt Mg2+(aq) + 2 e → Mg(s) E° = - 2,34 volt Cr3+(aq) + 2 e → Cr(s) E° = - 0,74 volt Harga potensial sel yang paling besar terdapat pada .... Options: Zn/Zn2+(aq)//Cu2+(aq)/Cu, Cr/Cr3+(aq)//Cu2+(aq)/Cu, Zn/Zn2+(aq)//Cr3+(aq)/Cr, Mg/Mg2+(aq)//Cu2+(aq)/Cu, Mg/Mg2+(aq)//Cr3+(aq)/Cr
Back
Mg/Mg2+(aq)//Cu2+(aq)/Cu
2.
FLASHCARD QUESTION
Front
Pernyataan yang tidak tepat dan berhubungan dengan kedua elektrode adalah ....
- logam Cu lebih sukar teroksidasi dari pada logam Z
- pada sel yang dibentuk oleh kedua elektrode tersebut, logam Zn merupakan elektrode negatif
- pada sel yang dibentuk oleh kedua elektrode tersebut, logam Cu merupakan elektrode positif
- potensial yang dibentuk oleh kedua elektrode tersebut adalah 1,10 Volt
- ion Zn2+lebih mudah tereduksi dibanding dengan ion Cu2+
Back
ion Zn2+lebih mudah tereduksi dibanding dengan ion Cu2+
3.
FLASHCARD QUESTION
Front
Dari data Eo Zn = - 0.76 Volt, dapat dikatakan bahwa dalam keadaan standar
Back
ion H+ lebih mudah tereduksi daripada ion Zn2+
4.
FLASHCARD QUESTION
Front
Bila dua potong logam, yaitu tembaga dan seng dengan Eoreduksi berturut-turut + 0,34 Volt dan - 0,76 Volt dicelupkan ke dalam asam sulfat 1 M, apa yang terjadi?
Back
tembaga larut menghasilkan gas hidrogen
5.
FLASHCARD QUESTION
Front
Bila diketahui : Ni + Fe2+ --> Ni2+ + Fe E0 = - 0,19 volt Al3+ + 3e --> Al E0 = - 1,66 volt Fe2+ + 2e --> Fe E0 = - 0,44 volt maka potensial sel standar untuk reaksi: 2 Al + 3 Ni2+ --> 2 Al3+ + 3 Ni, adalah ....
Back
+ 2,29 volt
6.
FLASHCARD QUESTION
Front
Bagan sel volta untuk reaksi: Ni(s) + 2AgNO3(aq) --> Ni(NO3)2(aq) + 2Ag(s)
Back
Ni | Ni2+ ||Ag+ |Ag
7.
FLASHCARD QUESTION
Front
Back
Diagram selnya adalah Cr3+ / Cr // Cu / Cu2+
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