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**Tip**: Follow these simple tips to get the problems related to Nernst equation right:

- Write the formula relating the quantities asked in the question
- Write down all the values given in the question
- Plug in the values into the formula and obtain the value asked in the question
- Be careful to use the value of R, T ,n and F as variation in their values can give a completely different answer

Now get on to solve these questions:

Calculate *EMF *of $Zn∣_{(0.01M)}∣∣_{(0.1M)}∣Ag$

$E_{Zn/Zn_{+2}}=0.762VE_{Ag_{+}/Ag}=+0.80V$

For a reaction, $A(s)+2B_{+}→A_{2+}+2B$, $K_{c}$ has been found to be $10_{12}$. The $E_{cell}$ is:

For hydrogen-oxygen fuel cell, the cell reaction is:

$2H_{2}(g)+O_{2}(g)⟶2H_{2}O(l)$

If $ΔG_{f}(H_{2}O)=−237.2kJmol_{−1}$, then emf of this cell is:

$2H_{2}(g)+O_{2}(g)⟶2H_{2}O(l)$

If $ΔG_{f}(H_{2}O)=−237.2kJmol_{−1}$, then emf of this cell is: