NTA Abhyas NEET2020ChemistryElectrochemistryPractice
The standard reduction potential E ° for the half reactions are as: Zn 2 + + 2 e − → Zn , E ° = − 0.76 V Cu 2 + + 2 e − → Cu , E ° = 0.34 V The standard cell voltage for the cell reaction is? Z n + C u 2 + → Z n 2 + + C u
Options
- A0.42 V
- B-0.42 V
- C-1.1 V
- D1.10 V
Correct answer
D. 1.10 V
Step-by-step solution
E cell o = E Cathode o - E Anode o E cell o = E Cu +2 /Cu o - E Zn +2 /Zn o = 0.34 − ( − 0.76 ) = 1.10 V