MHT CET20244 May 2024Evening ShiftChemistryElectrochemistryActual
If E ^ cell for Cd _ ( s ) | Cd _ ( IM ) ²⁺ Ag _ ( IM ) ⁺ | Ag _ ( s ) is 1.2 V . What is the emf of the cell at 25^ C ?
Options
- A-1.2 ~V
- B2.4 V
- C-2.4 V
- D1.2 V
Correct answer
D. 1.2 V
Step-by-step solution
The electrode reaction is: Cd +2 Ag ⁺ Cd ²⁺+2 Ag For this cell reaction, n =2 . Using Nernst equation at 298 K : aligned E _ cell & = E _ cell ^o- 0.0592 2 ₁₀ [ Cd ²⁺ ] . Ag ⁺ ]^2 & =1.2- 0.0592 2 ₁₀ 1 1 E _ cell & =1.2-0=1.2 ~V ( ₁₀ 1=0 ) aligned