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Perhatikan data potensial standar berikut! Cu + + e − → Cu E ∘ = + 0 , 52 volt Sn 2 + + 2 e − → Sn E ∘ = − 0 , 14 volt Al 3 + + 3 e − → Al E ∘ = − 1 , 66 volt Ag + + e − → Ag E ∘ = + 0 , 8 volt Reaksi yang berlangsung spontan adalah ...

Perhatikan data potensial standar berikut!
 

  


Reaksi yang berlangsung spontan adalah ...space 

  1. Ag space I space Ag to the power of plus sign space parallel to space Al to the power of 3 plus sign space I space AI 

  2. Cu space I space Cu to the power of plus sign space parallel to space Al to the power of 3 plus sign space I space AI 

  3. Ag space I space Ag to the power of plus sign space parallel to space Cu space I space Cu to the power of plus sign 

  4. Al space I space Al to the power of 3 plus sign space parallel to space Sn to the power of 2 plus sign space I space Sn 

  5. Cu space I space Cu to the power of plus sign space parallel to space Sn to the power of 2 plus sign space I space Sn 

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S. Lubis

Master Teacher

Jawaban terverifikasi

Jawaban

jawaban yang benar adalah D.

jawaban yang benar adalah D.space 

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Pembahasan

Diketahui: Notasi sel: Reaksi spontan memiliki nilai Menentukan nilai : A. B. C. D. E. Oleh karena itu,reaksi yang berlangsung spontan adalah . Jadi, jawaban yang benar adalah D.

Diketahui:

  • Notasi sel: Oksidasi space parallel to space Reduksi 
  • Reaksi spontan memiliki nilai italic E degree sel greater than 0 

Menentukan nilai italic E degree sel:

A. Ag space I space Ag to the power of plus sign space parallel to space Al to the power of 3 plus sign space I space AI 

table attributes columnalign right center left columnspacing 0px end attributes row cell italic E degree sel end cell equals cell italic E degree reduksi minus sign italic E degree oksidasi end cell row blank equals cell italic E degree Al bond E degree Ag end cell row blank equals cell negative sign 1 comma 66 minus sign 0 comma 8 end cell row blank equals cell negative sign 2 comma 46 space volt end cell end table 

B. Cu space I space Cu to the power of plus sign space parallel to space Al to the power of 3 plus sign space I space AI 

table attributes columnalign right center left columnspacing 0px end attributes row cell italic E degree sel end cell equals cell italic E degree reduksi minus sign italic E degree oksidasi end cell row blank equals cell italic E degree Al bond E degree Cu end cell row blank equals cell negative sign 1 comma 66 minus sign 0 comma 52 end cell row blank equals cell negative sign 2 comma 18 space volt end cell end table 

C. Ag space I space Ag to the power of plus sign space parallel to space Cu space I space Cu to the power of plus sign 

table attributes columnalign right center left columnspacing 0px end attributes row cell italic E degree sel end cell equals cell italic E degree reduksi minus sign italic E degree oksidasi end cell row blank equals cell italic E degree Cu bond E degree Ag end cell row blank equals cell 0 comma 52 minus sign 0 comma 8 end cell row blank equals cell negative sign 0 comma 28 space volt end cell end table 

D. Al space I space Al to the power of 3 plus sign space parallel to space Sn to the power of 2 plus sign space I space Sn 

table attributes columnalign right center left columnspacing 0px end attributes row cell italic E degree sel end cell equals cell italic E degree reduksi minus sign italic E degree oksidasi end cell row blank equals cell italic E degree Sn bond E degree Al end cell row blank equals cell negative sign 0 comma 14 minus sign left parenthesis minus sign 1 comma 66 right parenthesis end cell row blank equals cell 1 comma 52 space volt end cell end table  

E. Cu space I space Cu to the power of plus sign space parallel to space Sn to the power of 2 plus sign space I space Sn 

table attributes columnalign right center left columnspacing 0px end attributes row cell italic E degree sel end cell equals cell italic E degree reduksi minus sign italic E degree oksidasi end cell row blank equals cell italic E degree Sn bond E degree Cu end cell row blank equals cell negative sign 0 comma 14 minus sign 0 comma 52 end cell row blank equals cell negative sign 0 comma 66 space volt end cell end table 

Oleh karena itu, reaksi yang berlangsung spontan adalah Al space I space Al to the power of 3 plus sign space parallel to space Sn to the power of 2 plus sign space I space Sn.

Jadi, jawaban yang benar adalah D.space 

Latihan Bab

Konsep Kilat

Pendahuluan Elektrokimia

Sel Volta

Korosi

3rb+

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Diketahui : Al 3 + ( a q ) + 3 e − → Al ( s ) E ∘ = − 1 , 66 volt Zn 2 + ( a q ) + 2 e − → Ag ( s ) E ∘ = − 0 , 76 volt Notasi selreaksi yang benar agar reaksi berlangsung spontan adalah ....

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