Roboguru

Perhatikan data potensial standar berikut!   Cu++e−→CuE∘=+0,52voltSn2++2e−→SnE∘=−0,14voltAl3++3e−→AlE∘=−1,66voltAg++e−→AgE∘=+0,8volt   Reaksi yang berlangsung spontan adalah ...

Pertanyaan

Perhatikan data potensial standar berikut!
 

Cu to the power of plus sign and e to the power of minus sign space space space yields Cu space space italic E degree equals plus 0 comma 52 space volt Sn to the power of 2 plus sign and 2 e to the power of minus sign yields Sn space space italic E degree equals minus sign 0 comma 14 space volt Al to the power of 3 plus sign and 3 e to the power of minus sign space yields Al space space italic E degree equals minus sign 1 comma 66 space volt Ag to the power of plus sign and e to the power of minus sign space space space yields Ag space space italic E degree equals plus 0 comma 8 space volt  


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 

Pembahasan:

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 

Jawaban terverifikasi

Dijawab oleh:

S. Lubis

Mahasiswa/Alumni Universitas Sumatera Utara

Terakhir diupdate 07 Oktober 2021

Roboguru sudah bisa jawab 91.4% pertanyaan dengan benar

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Roboguru

Roboguru sudah bisa jawab 91.4% pertanyaan dengan benar

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