
Calculate the equilibrium constant for the reaction, .The standard reduction potential in acidic conditions are and respectively for and couples.
Answer
492.9k+ views
Hint:Here in this question we will use the concepts of Nernst equation which relates the reduction potential of an electrochemical reaction for half-cell or full cell reaction to the standard electrode potential, temperature and activities.
Complete answer:
First let us discuss about nernst equation and its application:
The Nernst equation can be written as:
For a general electrochemical reaction of the type:
Now we know that at equilibrium and
So we get
Let’s solve the problem for given data:
, = , =0.54V
Given reduction potential of to = , oxidation potential = - and to = i.e oxidation potential = - .
Cell potential =
Now we know that,
Note:
We have to take care while calculating the electrode potential of a full cell. We have to subtract their oxidation potential according to the given reaction and we can also use the other method to calculate the potential of the cell.
Complete answer:
First let us discuss about nernst equation and its application:
The Nernst equation can be written as:
For a general electrochemical reaction of the type:
Now we know that at equilibrium
So we get
Let’s solve the problem for given data:
Given reduction potential of
Cell potential =
Now we know that,
Note:
We have to take care while calculating the electrode potential of a full cell. We have to subtract their oxidation potential according to the given reaction and we can also use the other method to calculate the potential of the cell.
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