To calculate the standard cell potential E for the given electrochemical cell, we first need to identify the anode oxidation and cathode reduction half-reactions. The half-reaction with the more negative standard reduction potential will be the anode oxidation , and the half-reaction with the less negative or more positive standard reduction potential will be the cathode reduction .Given:Ecell Zn2+/Zn = -0.76 V more negative Ecell Cr3+/Cr = -0.74 V less negative So, the anode half-reaction is:Zn s Zn2+ aq + 2e- oxidation And the cathode half-reaction is:Cr3+ aq + 3e- Cr s reduction Now, we can calculate the standard cell potential E for the cell using the equation:Ecell = Ecathode - EanodeEcell = -0.74 V - -0.76 V Ecell = 0.02 VThe standard cell potential E for the given electrochemical cell is 0.02 V.