a) Define the following terms as used in electrochemistry: i) Oxidation ii) Reduction iii) Standard electrode potential b) The following standard electrode potentials are given: Zn²⁺(aq)/Zn(s): E° = -0.76 V Cu²⁺(aq)/Cu(s): E° = +0.34 V i) Write the half-equation for the reaction occurring at the anode when a Zn-Cu electrochemical cell is set up. ii) Write the half-equation for the reaction occurring at the cathode. iii) Write the overall cell equation. iv) Calculate the standard cell e.m.f. (E°cell). v) State whether the cell reaction is spontaneous or non-spontaneous, giving a reason. c) State TWO differences between electrolytic cells and electrochemical (galvanic) cells.