CBSE Guess > Papers > Important Questions > Class XII > 2013 > Chemistry > Nernst Equation (Numerical) By Mr. R. Srinivas Vasudevamurthy

CBSE CLASS XII

Nernst Equation (Numerical)

5. Calculate the potential of hydrogen electrode in contact with a solution of p^H = 10.

6. At what p^H of HCl solution will the standard hydrogen electrode will have a potential of - 0.118V ?

7. Calculate the cell potential of Cr/Cr³+|| Fe² / Fe.(0.1M) (0.1M) Given E⁰Cr³+/Cr = - 0.74V E⁰ Fe²+/Fe = - 0.44V.

8. Calculate the cell potential at 298K

Zn + Sn⁴⁺Zn²⁺  + Sn²⁺
(1.5M)                         (0.5M)  (2M) 

Given E⁰Zn²⁺/Zn = - 0.76V E⁰Sn⁴⁺/Sn²⁺ = 0.13V

9. Calculate the equilibrium constant and work done by the cell Ni + Cu²⁺ Ni²⁺ +Cu Given E0Ni²⁺ / Ni = - 0.25V E⁰ Cu²⁺/Cu = 0.34 V

10 . Find the emf of the cell Pb/Pb2+(0.001M)|| Pt, Cl² (1.5 atm) / 2Cl-(1M) E⁰Pb²⁺/ Pb = - 0.13V  E⁰ Cl2/ 2 Cl- = 1.36V

11. Find the potential of the electrode Mg²⁺/ Mg

Mg²⁺ + 2e- Mg E⁰ Mg²⁺/ Mg = - 2.36 V

12. An electrochemical cell is set up by dipping Cu in 0.1M CuSO₄(aq) and Ag in 0.1M AgNO₃(aq) Write reaction taking place at each electrode and overall reaction. Determine the potential of the cell at 298K.

 

Submitted By : Mr. R. Srinivas Vasudevamurthy
Email: [email protected]