Use the appropriate standard reduction potentials to calculate the value of K at 25.0 oC NiO2(s) +...

Question

Use the appropriate standard reduction potentials to calculate the value of K at 25.0 oC NiO2(s) + 2Cl-(aq) + 4H+(aq) ----> Cl2(g) + Ni2+(aq) + 2H2O

David · Accepted Answer

The overall reaction is: 
NiO2(s) + 2Cl
-(aq) + 4H+(aq) ----> Cl2(g) + Ni
2+(aq) + 2H2O 
Standard reduction potentials for the half reactions of the cell: 
NiO2(s) + 4H
+(aq) + 2e- ----> + Ni2+(aq) + 2H2O………………………E
o red = 1.678 V 
2Cl-(aq) ----> Cl2(g) + 2e
-…………………………………………………….. Eo oxi = -1.358 V 
For calculating standard potential, Eocell, of the overall reaction we need to add standard 
reduction and oxidation potentials of the half reactions.

Use the appropriate standard reduction potentials to calculate the value of K at 25.0 oC NiO2(s) + 2Cl-(aq) + 4H+(aq) ----> Cl2(g) + Ni2+(aq) + 2H2O

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