Question

A strip of nickel metal is placed in a 1 molar solution of Ni(NO₃)₂ and a strip of silver metal is placed in a one molar solution of AgNO₃. An electrochemical cell is created when the two solution are connected by a salt bridge and the two strips are connected by wires to a voltmeter.

(i) Write the balanced equation for the overall reaction occurring in the cell and calculate the cell potential. 

(ii) Calculate the cell potential, E at 25°C for the cell, if the initial concentration of Ni(NO₃)₂ is 0.100 molar and the initial concentration of AgNO₃ is 1.00 molar.

[E°_Ni²⁺/Ni = -0.25 V, E° Ag⁺/Ag = 0.80 V]

log 10^-1 = -1

Answer 1

(i)

= 0.80 - (-0.25)

= 1.05 V

(ii)

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