3.52 numerical plz

Asked by lovemaan5500 | 19th Aug, 2019, 11:12: PM

Expert Answer:

Given:
 
ECu2+/Cu = −0.337 V
 
EMg2+/Mg = −2.37 V
 
F = 96500 C/mol
 
Net reaction,
 
Mg(s)  + Cu2+(aq) → Mg2+(aq) + Cu(s) 
 
 E0cell = −0.337 − 2.37
 
         = 2.74 V
 
Nernst equation;
 
straight E subscript cell space end subscript equals space straight E subscript cell superscript 0 space minus space fraction numerator 0.0591 over denominator straight n end fraction log space straight k subscript straight c

space space space space space space space equals space 2.707 space minus space fraction numerator 0.0591 over denominator 2 end fraction log fraction numerator open square brackets Mg to the power of 2 plus end exponent close square brackets open square brackets Cu close square brackets over denominator open square brackets Cu to the power of 2 plus end exponent close square brackets open square brackets Mg close square brackets end fraction

space space space space space space space equals space 2.707 minus space 0.0295 space log open parentheses fraction numerator 0.001 over denominator 0.0001 end fraction close parentheses

space space space space space space space equals space 2.707 space space minus space 0.0295 space open parentheses log space 10 close parentheses

straight E subscript cell space end subscript equals 2.6775 space straight V
 
emf of the cell is 2.6775 V

Answered by Varsha | 20th Aug, 2019, 12:45: PM