• Coppia $Fe^{3+}/Fe^{2+}$
  $$\begin{eqnarray*} Fe^{3+}+e&=&Fe^{2+} \end{eqnarray*}$$
  
  
  $$\begin{eqnarray*} E_{Fe^{3+}/Fe^{2+}}&=&E^\circ_{Fe^{3+}/Fe^{2+}}+\frac{RT}{F}\ln\frac{[Fe^{3+}]}{[Fe^{2+}]} \end{eqnarray*}$$
  
  

• Coppia $Ag^+/Ag$
  $$\begin{eqnarray*} Ag^++e&=&Ag \end{eqnarray*}$$
  
  
  $$\begin{eqnarray*} E_{Ag^+/Ag}&=&E^{\circ\prime}_{Ag^+/Ag}+\frac{RT}{F}\ln\frac{[... ...}{F}\ln[Ag^+]\\ &=&E^{\circ}_{Ag^+/Ag}+\frac{RT}{F}\ln[Ag^+]\\ \end{eqnarray*}$$
  
  

• Coppia $Cr_2O_7^{2-}/Cr^{3+}$
  $$\begin{eqnarray*} Cr_2O_7^{2-}+14H^++6e&=&2Cr^{3+}+7H_2O \end{eqnarray*}$$
  
  
  $$\begin{eqnarray*} E_{Cr_2O_7^{2-}/Cr^{3+}}&=&E^{\circ}_{Cr_2O_7^{2-}/Cr^{3+}}+\f... ...O_7^{2-}\right]\left[H^+\right]^{14}}{\left[Cr^{3+}\right]^2}\\ \end{eqnarray*}$$
  
  

• Coppia $AgCl/Ag$
  $$\begin{eqnarray*} AgCl+e&=&Ag+Cl^- \end{eqnarray*}$$
  
  
  $$\begin{eqnarray*} E_{AgCl/Ag}&=&E^{\circ}_{AgCl/Ag}+\frac{RT}{F}\ln\frac{1}{\lef... ...ght]}\\ &=&E^{\circ}_{AgCl/Ag}-\frac{RT}{F}\ln\left[Cl^-\right] \end{eqnarray*}$$
  
  

• Coppia $H^+/H_2$
  $$\begin{eqnarray*} 2H^++2e&=&H_2 \end{eqnarray*}$$
  
  
  $$\begin{eqnarray*} E_{H^+/H_2}&=&E^{\circ}_{H^+/H_2}+\frac{RT}{2F}\ln\frac{\left[H^+\right]^2}{p_{H_2}}\\ \end{eqnarray*}$$