MHT CET2009ChemistryElectrochemistry
The standard reduction potential for Mg ²⁺ / Mg is -2.37 ~V and for Cu ²⁺ / Cu is 0.337 . The E_ cell ^ for the following reaction is Mg + Cu ²⁺ Mg ²⁺+ Cu
Options
- A+2.03 ~V
- B-2.03 ~V
- C-2.7 ~V
- D+2.7 ~V
Correct answer
D. +2.7 ~V
Step-by-step solution
E_ cell ^ =E_ cathode ^ -E_ anode ^ aligned =E_ ( Cu ²⁺ / Cu ) ^ -E_ ( Mg ²⁺ / Mg ) ^ &=0.337-(-2.37) V &=2.7 ~V aligned