electrochemistry

1)A cell Ag|Ag+||Cu2+|Cu initially contains 1M Ag+ and 1M Cu2+ ions. Calculate the change in cell potential after passage of 9.65A of current for 1 hour.

2)Calculate emf of the following cell at 25°C

Pt,H2(3 atm)|HCl|H2(15 atm),Pt,E0H+/12H2= 0V

3)EMF of the cell Pt,H2(1 atm)|H+(aq)||AgCl|Ag is 0.27V and 0.26V at 25°C and 35°C.Heat of reaction occuring inside the cell at 25°C is:

Pls explain your solutions....

3 Answers

71
Vivek @ Born this Way ·

1. It is a simple question based on faraday's laws.

The concentration of Ag will increase while that of Cu should decrease.

3. Use the Van't Hoff's Formula ie.., ln K2/K1 = ΔHR [ T2-T1T2T1 ]

2. Write the reactions (Oxidation and Reduction) and then use Nerst Eqaution.

1
johncenaiit ·

@vivek...pls elaborate 1........

1
johncenaiit ·

4)At 25°C the specific conductance of a saturated solution of AgCl after subracting the specific conductance of water is 1.82x10-4 Sm-1.The molar conductance at infinite dilution of AgNO3,HNO3 and HCl are respectively 133x10-4 ,421x10-4 ,426x10-4 Sm2mol-1.Find the solubility of AgCl. Write down half cell reaction and calculate std.reduction potential for the half cell:Pt|50mL 0.5M KCl sol.,in which few drops of 0.1 M sol. of AgNO3 is added to ppt. some AgCl . E0Ag+,Ag = 0.8V

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