Physical Chemistry Answers

Write a thermochemical equation for the melting of ice (include the energy term)

What are concentration cells? Emf of the cell Cd | CdSO4 (X M)||CdSO4 (0.025 M)| Cd at 28oC is 0.035 V. Find the Concentration of CdSO4 at anode. Given R=8.314 J/K/mol, F=96500 C.

The emf of cell Cd |CdSO4(0.0093M) || CdSO4(xM)| Cd is 0.086V at 250C. Find the value of X.
Solution.

The Spontaneous Galvanic cell Tin | Tin ion (0.024M) ‖ Tin ion (0.064M) | Tin develops an emf of 0.0126 V at 250C, Calculate the Valency of Tin.

7. What voltage will be generated by a cell that consists of an iron electrode immersed in 0.5M FeSO4 solution and a copper electrode immersed in 1M CuSO4solution at 298 K. Given EoFe= -0.41V and EoCu=0.34V. Write the cell representation and cell reaction.

A Concentration cell was constructed by immersing two silver electrodes in 0.05M and 1M AgNO3 solution. Write the cell representation , cell reactions and calculate the emf of the cell.

Determine the concentration of Cd2+ ions in the following electrochemical cell:
Fe|Fe2+ (0.1M) ||Cd2+ (x M)|Cd, Given that Ecell = -0.02 V and Eo cell = 0.04 V at 298K

Calculate the emf of a Cd-Cu cell in which Cd is in contact with 0.002 M CdSO4 and Cu in contact with 0.02 M CuSO4 solution. The standard emf of the cell is 0.74 V at 298 K.

For the cell, Fe|Fe 2+ (0.01 M)|| Ag+ (0.1 M)|Ag, Write the cell reaction and calculate the emf of the cell at 298 K, if standard electrode potentials of Fe and Ag electrodes are -0.44 V and 0.8 V respectively. Calculate the change in standard free energy ∆Go for the reduction of 1 mole of Ag+.

Calculate the potential of Ag-Zn cell at 298 K if the concentration of Ag+ and Zn2+ are 5.2 x 10-6 M and 1.3 x 10-3 M respectively. Eo of the cell at 298 K is 1.56 V. Write the cell representation and reactions. Calculate the change in free energy ∆G for the reduction of 1 mole of Ag+.