Roboguru

Diketahui data potensial reduksi sebagai berikut: E∘Ca2+/Ca=‐2,87VE∘Pb2+/Pb=‐0,13VE∘Mg2+/Mg=‐2,37VE∘Au3+/Au=+1,50V Berdasarkan data tersebut, reaksi yang berlangsung spontan adalah ....

Pertanyaan

Diketahui data potensial reduksi sebagai berikut:

begin mathsize 14px style straight E degree space Ca to the power of 2 plus end exponent divided by Ca equals short dash 2 comma 87 space straight V space space space space space space straight E degree space Pb to the power of 2 plus end exponent divided by Pb equals short dash 0 comma 13 space straight V  straight E degree space Mg to the power of 2 plus end exponent divided by Mg equals short dash 2 comma 37 space straight V space space space space space straight E degree space Au to the power of 3 plus end exponent divided by Au equals plus 1 comma 50 space straight V end style

Berdasarkan data tersebut, reaksi yang berlangsung spontan adalah ....

  1. begin mathsize 14px style Mg divided by Mg to the power of 2 plus end exponent space ⫽ space Ca to the power of 2 plus end exponent divided by Ca end style

  2. begin mathsize 14px style Pb divided by Pb to the power of 2 plus end exponent space ⫽ space Mg to the power of 2 plus end exponent divided by Mg end style

  3. begin mathsize 14px style Au divided by Au to the power of 3 plus end exponent space ⫽ space Pb to the power of 2 plus end exponent divided by Pb end style

  4. begin mathsize 14px style Ca divided by Ca to the power of 2 plus end exponent space ⫽ space Mg to the power of 2 plus end exponent divided by Mg end style

  5. begin mathsize 14px style Mg divided by Mg to the power of 2 plus end exponent space ⫽ space Pb to the power of 2 plus end exponent divided by Pb end style

Pembahasan:

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

  • begin mathsize 14px style Mg divided by Mg to the power of 2 plus end exponent space ⫽ space Ca to the power of 2 plus end exponent divided by Ca end style

E to the power of o space space equals space E to the power of o Ca space minus sign space E to the power of o Mg space equals minus sign 2 comma 87 space minus sign space left parenthesis minus sign 2 comma 37 right parenthesis space equals space minus sign 0 comma 5 space V

  • begin mathsize 14px style Pb divided by Pb to the power of 2 plus end exponent space ⫽ space Mg to the power of 2 plus end exponent divided by Mg end style

E to the power of o space space equals space E to the power of o Mg space minus sign space E to the power of o Pb space equals minus sign 2 comma 37 space minus sign space left parenthesis minus sign 0 comma 13 right parenthesis space equals space minus sign 2 comma 24 space v

  • begin mathsize 14px style Au divided by Au to the power of 3 plus end exponent space ⫽ space Pb to the power of 2 plus end exponent divided by Pb end style

E to the power of o space space equals space E to the power of o Pb space minus sign space E to the power of o Au space equals minus sign 0 comma 13 space minus sign space left parenthesis plus 1 comma 50 right parenthesis space equals space minus sign 1 comma 63 space V space

  • begin mathsize 14px style Ca divided by Ca to the power of 2 plus end exponent space ⫽ space Mg to the power of 2 plus end exponent divided by Mg end style

E to the power of o space space equals space E to the power of o Mg space minus sign space E to the power of o Ca space equals minus sign 2 comma 37 space minus sign space left parenthesis minus sign 2 comma 87 right parenthesis space equals space plus 0 comma 5 space V

  • begin mathsize 14px style Mg divided by Mg to the power of 2 plus end exponent space ⫽ space Pb to the power of 2 plus end exponent divided by Pb end style

E to the power of o space space equals space E to the power of o Pb space minus sign space E to the power of o Mg space equals minus sign 0 comma 13 minus sign space left parenthesis minus sign 2 comma 37 right parenthesis space equals space plus 2 comma 24 space V space

 

 

Jawaban terverifikasi

Dijawab oleh:

S. Yunita

Mahasiswa/Alumni Institut Agama Islam Negeri (IAIN) Syekh Nurjati Cirebon

Terakhir diupdate 04 Oktober 2021

Roboguru sudah bisa jawab 91.4% pertanyaan dengan benar

Tapi Roboguru masih mau belajar. Menurut kamu pembahasan kali ini sudah membantu, belum?

Membantu

Kurang Membantu

Apakah pembahasan ini membantu?

Belum menemukan yang kamu cari?

Post pertanyaanmu ke Tanya Jawab, yuk

Mau Bertanya

Pertanyaan serupa

Perhatikan potensial elektroda standar berikut ini! Ag+(aq)+e−→Ag(s)E0=+0,80VIn3+(aq)+3e−→In(s)E0=−0,34VMg2+(aq)+2e−→Mg(s)E0=−2,37VMn2+(aq)+2e−→Mn(s)E0=−1,20V  Pasangan yang memberikan perbedaan pot...

0

Roboguru

Roboguru sudah bisa jawab 91.4% pertanyaan dengan benar

Tapi Roboguru masih mau belajar. Menurut kamu pembahasan kali ini sudah membantu, belum?

Membantu

Kurang Membantu

Apakah pembahasan ini membantu?

Belum menemukan yang kamu cari?

Post pertanyaanmu ke Tanya Jawab, yuk

Mau Bertanya

RUANGGURU HQ

Jl. Dr. Saharjo No.161, Manggarai Selatan, Tebet, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12860

Coba GRATIS Aplikasi Ruangguru

Produk Ruangguru

Produk Lainnya

Hubungi Kami

Ikuti Kami

©2021 Ruangguru. All Rights Reserved