One-half of an electrochemical cell consists of a pure nickel electrode in a sol
ID: 716552 • Letter: O
Question
One-half of an electrochemical cell consists of a pure nickel electrode in a solution of Ni2+ ions, and the other half is a titanium electrode immersed in a Ti2+ solution: a) if the cell is a standard one, write the spontaneous overall reaction and calculate the voltage that is generated, b) calculate the cell potential at 25 C if the Ni2+ and Ti2+ concentrations are 0.75 and 0.0075 M, respectively, and c) what is the Gibbs Free energy change of the system in the later conditions and what does that mean?
Explanation / Answer
Ti ------> Ti2+ + 2e
Ni2+ + 2e ------> Ni
Overall reaction : Ti + Ni2+ ------> Ti2+ + Ni
Ecell = 1.63 - 0.23 = 1.43 V
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