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Beberapa data harga potensial reduksi standar ( E o )berikut : Ag + ( aq ) + e → Ag ( s ) E ∘ = + 0 , 8 V Pb 2 + ( aq ) + 2 e → Pb ( s ) E ∘ = − 0 , 14 V Ni 2 + ( aq ) + 2 e → Ni ( s ) E ∘ = − 0 , 25 V Fe 2 + ( aq ) + 2 e → Fe ( s ) E ∘ = − 0 , 44 V Reaksi yang dapat berlangsung spontan adalah ....

Beberapa data harga potensial reduksi standar () berikut :

Reaksi yang dapat berlangsung spontan adalah ....

  1. Ag forward slash Ag to the power of plus sign forward slash forward slash Fe to the power of 2 plus sign forward slash Fe

  2. Ni forward slash Ni to the power of 2 plus sign forward slash forward slash Fe to the power of 2 plus sign forward slash Fe

  3. Ag forward slash Ag to the power of plus sign forward slash forward slash Pb to the power of 2 plus sign forward slash Pb

  4. Ag forward slash Ag to the power of plus sign forward slash forward slash Ni to the power of 2 plus sign forward slash Ni

  5. Ni forward slash Ni to the power of 2 plus sign forward slash forward slash Pb to the power of 2 plus sign forward slash Pb

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J. Siregar

Master Teacher

Mahasiswa/Alumni Universitas Negeri Medan

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Pembahasan

Reaksi yang dapat berlangsung spontan adalah reaksi yang memiliki nilai E°selpositif. Pada notasi sel berlaku : oksidasi || reduksi Maka, reaksi yang berlangsung spontan adalah Ni| Ni 2 + || Pb 2+ | Pb

Reaksi yang dapat berlangsung spontan adalah reaksi yang memiliki nilai E°sel positif.

E degree equals space E degree R e d u k s i minus space E degree space o k s i d a s i 

Pada notasi sel berlaku : oksidasi || reduksi

  • Ag forward slash Ag to the power of plus sign forward slash forward slash Fe to the power of 2 plus sign forward slash Fe

E to the power of o equals space E to the power of o Fe space minus sign space space E to the power of o Ag space equals space left parenthesis minus sign 0 comma 44 right parenthesis space minus sign space left parenthesis plus 0 comma 80 right parenthesis space equals space plus 1 comma 24 space V

  • Ni forward slash Ni to the power of 2 plus sign forward slash forward slash Fe to the power of 2 plus sign forward slash Fe

E to the power of o equals space E to the power of o Fe space minus sign space E to the power of o Ni space equals space left parenthesis minus sign 0 comma 44 right parenthesis space minus sign space left parenthesis minus sign 0 comma 25 right parenthesis space equals space minus sign 0 comma 19 space V

  • Ag forward slash Ag to the power of plus sign forward slash forward slash Pb to the power of 2 plus sign forward slash Pb

E to the power of o equals space E to the power of o Pb space minus sign space E to the power of o Ag space equals space left parenthesis minus sign 0 comma 14 right parenthesis space minus sign space left parenthesis plus 0 comma 80 right parenthesis space equals minus sign 0 comma 94 space V

  • Ag forward slash Ag to the power of plus sign forward slash forward slash Ni to the power of 2 plus sign forward slash Ni

E to the power of o equals space E to the power of o Ni space minus sign space space E to the power of o Ag space equals space left parenthesis minus sign 0 comma 25 right parenthesis space minus sign space left parenthesis plus 0 comma 80 right parenthesis space equals space minus sign 1 comma 05 space V

  • Ni forward slash Ni to the power of 2 plus sign forward slash forward slash Pb to the power of 2 plus sign forward slash Pb

E to the power of o equals space E to the power of o Pb space minus sign space space E to the power of o Ni space equals space left parenthesis minus sign 0 comma 14 right parenthesis space minus sign space left parenthesis minus sign 0 comma 25 right parenthesis space equals space plus 0 comma 11 space V

Maka, reaksi yang berlangsung spontan adalah Ni | Ni2|| Pb2+ | Pb

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