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Diketahui potensial standar dari beberapa setengah reaksi berikut.     Reaksi berikut yang dapat berlangsung spontan adalah ....

Pertanyaan

Diketahui potensial standar dari beberapa setengah reaksi berikut.
 

begin mathsize 14px style Fe to the power of 3 plus sign left parenthesis italic a italic q right parenthesis plus e to the power of minus sign yields Fe to the power of 2 plus sign left parenthesis italic a italic q right parenthesis space space italic E degree equals plus 0 comma 77 space V Br subscript 2 open parentheses italic s close parentheses and 2 e to the power of minus sign yields 2 Br to the power of minus sign left parenthesis italic a italic q right parenthesis space space space space space italic E degree equals plus 1 comma 07 space V I subscript 2 open parentheses italic s close parentheses and 2 e to the power of minus sign yields 2 I to the power of minus sign left parenthesis italic a italic q right parenthesis space space space space space space space space space space space italic E degree equals plus 0 comma 54 space V Cu to the power of 2 plus sign left parenthesis italic a italic q right parenthesis plus 2 e to the power of minus sign yields Cu open parentheses italic s close parentheses space space space space space italic E degree equals plus 0 comma 34 space V end style 


Reaksi berikut yang dapat berlangsung spontan adalah ....space 

  1. begin mathsize 14px style 2 Fe to the power of 2 plus sign left parenthesis italic a italic q right parenthesis plus I subscript 2 open parentheses italic s close parentheses yields 2 Fe to the power of 3 plus sign left parenthesis italic a italic q right parenthesis plus 2 I to the power of minus sign left parenthesis italic a italic q right parenthesis end style undefined 

  2. begin mathsize 14px style Cu to the power of 2 plus sign left parenthesis italic a italic q right parenthesis plus 2 I to the power of minus sign left parenthesis italic a italic q right parenthesis yields Cu open parentheses italic s close parentheses and I subscript 2 open parentheses italic s close parentheses end style undefined 

  3. begin mathsize 14px style 2 Fe to the power of 3 plus sign left parenthesis italic a italic q right parenthesis plus 2 Br to the power of minus sign left parenthesis italic a italic q right parenthesis yields 2 Fe to the power of 2 plus sign left parenthesis italic a italic q right parenthesis plus Br subscript 2 open parentheses italic l close parentheses end style undefined 

  4. begin mathsize 14px style I subscript 2 open parentheses italic s close parentheses and 2 Br to the power of minus sign left parenthesis italic a italic q right parenthesis yields 2 I to the power of minus sign left parenthesis italic a italic q right parenthesis plus Br subscript 2 open parentheses italic l close parentheses end style undefined 

  5. begin mathsize 14px style 2 Fe to the power of 3 plus sign left parenthesis italic a italic q right parenthesis plus Cu open parentheses italic s close parentheses yields 2 Fe to the power of 2 plus sign left parenthesis italic a italic q right parenthesis plus Cu to the power of 2 plus sign left parenthesis italic a italic q right parenthesis end style undefined 

Pembahasan Soal:

Rumus menghitung undefined

undefined

Berdasarkan deret volta jika E degree bernilai lebih positif maka bertindak sebagai katoda dan jika hasil undefined positif maka reaksi berlangsung spontan. Seperti reaksi berikut:

begin mathsize 14px style 2 Fe to the power of 3 plus sign left parenthesis italic a italic q right parenthesis plus Cu open parentheses italic s close parentheses yields 2 Fe to the power of 2 plus sign left parenthesis italic a italic q right parenthesis plus Cu to the power of 2 plus sign left parenthesis italic a italic q right parenthesis end style

E degree space Fe equals plus 0 comma 77 space V space lebih space positif space open parentheses katoda close parentheses E degree space Cu equals plus 0 comma 34 space V space open parentheses anoda close parentheses E degree sel space equals space E degree katoda bond E degree anoda E degree sel space equals plus 0 comma 77 minus sign left parenthesis plus 0 comma 34 right parenthesis equals plus 0 comma 43 space left parenthesis reaksi space berlangsung space spontan right parenthesis

jadi, reaksi yang berlangsung spontan adalah reaksi Error converting from MathML to accessible text..space

 

 

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 20 Juli 2021

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