To calculate the corrosion potential of a galvanic couple, we need to determine the difference in potential between the two electrodes. In this case, we have a Zn electrode at -0.76 V and a Cu electrode at +0.34 V.The corrosion potential E_corr can be calculated using the following formula:E_corr = E_Cu - E_Znwhere E_Cu is the potential of the Cu electrode and E_Zn is the potential of the Zn electrode.Plugging in the given values:E_corr = +0.34 V - -0.76 V = 0.34 V + 0.76 V = 1.1 VThe corrosion potential of the galvanic couple composed of a Zn metal and a Cu metal in a 1 M Cu2+ solution at 298 K is 1.1 V.