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Pertanyaan

Perhatikan data potensial reduksi standar berikut! Ag + + e − → Ag E 0 = + 0 , 80 V Cu 2 + + 2 e − → Cu E 0 = + 0 , 34 V Zn 2 + + e − → Zn E 0 = − 0 , 76 V Al 3 + + 3 e − → Al E 0 = − 1 , 66 V Reaksi yang diharapkan berlangsung spontan terdapat pada ....

Perhatikan data potensial reduksi standar berikut!

   

Reaksi yang diharapkan berlangsung spontan terdapat pada ....

  1. begin mathsize 14px style Ag and Cu to the power of 2 plus sign yields Ag to the power of plus sign and Cu end style 

  2. begin mathsize 14px style Ag and Zn to the power of 2 plus sign yields Ag to the power of plus sign and Zn end style 

  3. begin mathsize 14px style Cu and Zn to the power of 2 plus sign yields Cu to the power of 2 plus sign and Zn end style 

  4. begin mathsize 14px style Zn and Al to the power of 3 plus sign yields Zn to the power of 2 plus sign and Al end style 

  5. begin mathsize 14px style Al and Ag to the power of plus sign yields Al to the power of 3 plus sign and Ag end style 

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Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah E.

jawaban yang tepat adalah E.

Pembahasan

Reaksi dapat berlangsung spontan adalahjika nilai > 0. Opsi A: Opsi B: Opsi C: Opsi D: Opsi E: Jadi, jawaban yang tepat adalah E.

Reaksi dapat berlangsung spontan adalah jika nilai begin mathsize 14px style E to the power of 0 subscript sel end style > 0.

Opsi A:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell E to the power of 0 subscript sel end cell equals cell E to the power of 0 subscript reduksi minus sign E to the power of 0 subscript oksidasi space end cell row cell E to the power of 0 subscript sel end cell equals cell plus 0 comma 34 space V minus sign left parenthesis plus 0 comma 80 space V right parenthesis end cell row cell E to the power of 0 subscript sel end cell equals cell negative sign 0 comma 46 space V space left parenthesis tidak space spontan right parenthesis end cell end table end style 

Opsi B:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell E to the power of 0 subscript sel end cell equals cell E to the power of 0 subscript reduksi minus sign E to the power of 0 subscript oksidasi space end cell row cell E to the power of 0 subscript sel end cell equals cell negative sign 0 comma 76 V minus sign left parenthesis plus 0 comma 80 space V right parenthesis end cell row cell E to the power of 0 subscript sel end cell equals cell negative sign 1 comma 56 space V space left parenthesis tidak space spontan right parenthesis end cell end table end style 

Opsi C:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell E blank to the power of 0 blank subscript sel end cell equals cell E to the power of 0 blank subscript reduksi minus sign E to the power of 0 blank subscript oksidasi end cell row cell E to the power of 0 blank subscript sel end cell equals cell negative sign 0 comma 76 space V minus sign left parenthesis plus 0 comma 34 space V right parenthesis end cell row cell E to the power of 0 blank subscript sel end cell equals cell negative sign 1 comma 10 space V space left parenthesis tidak space spontan right parenthesis end cell end table end style 

Opsi D:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell E to the power of 0 subscript sel end cell equals cell E to the power of 0 subscript reduksi minus sign E to the power of 0 subscript oksidasi end cell row cell E to the power of 0 subscript sel end cell equals cell negative sign 1 comma 66 space V minus sign left parenthesis minus sign 0 comma 76 space V right parenthesis end cell row cell E to the power of 0 subscript sel end cell equals cell negative sign 0 comma 90 space V space left parenthesis tidak space spontan right parenthesis end cell end table end style 

Opsi E:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell E to the power of 0 subscript sel end cell equals cell E to the power of 0 subscript reduksi minus sign E to the power of 0 subscript oksidasi end cell row cell E to the power of 0 subscript sel end cell equals cell plus 0 comma 80 space V minus sign left parenthesis minus sign 1 comma 66 space V right parenthesis end cell row cell E to the power of 0 subscript sel end cell equals cell 2 comma 46 space V space open parentheses spontan close parentheses end cell end table end style 

Jadi, jawaban yang tepat adalah E.

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