How to calculate the electrode potential value for REDOX reaction with examples
Answer Text: THE ELECTRODE POTENTIAL VALUE FOR A REDOX REACTION- Is usually calculated as the sum of the Eθ value for the half cells involved.Note:- If the sum is positive then the reaction can occur simultaneously;- If the value of the sum is negative the reaction cannot occur;Sample calculations1. Cu2+can oxidize Zinc but Zn2+ cannot oxidize Cu;- The overall reaction is positive, hence zinc can be oxidized by copper (II) ions, and hence reaction occurs;- The overall Eθ is negative; thus Zn2+ cannot oxidize Cu to Cu2+ (Cu cannot reduce Zn 2+ to Zn); and hence the reaction cannot occur.2. Can chlorine displace bromine form bromide solution?- The overall Eθ for the reaction is positive, so chlorine can displace bromine from a bromide solution.