Answer Happy

In an electrolysis experiment a solution of aqueous Copperen Bromide and phenolphthalein in which two carbon graphite electrodes attached to a 6V battery are inserted a. Write out all of the possible reactants in this cell Chint some reactants are ions) First reactant Second reactant Third reactant b. Write out the two possible oxidation reactions along with their oxidation potentials (hint there is a standard reduction voltage table on the last page of this test Oxidation reaction Ex M Write out the two possible reduction reactions for the cell along with their reduction potentials. (hint there is a standard reduction voltage table on the last page of this test) Ezed (V) Reduction reaction d. Write out the predicted reaction at the anode Predicted Anode Reaction e. Write out the predicted reaction at the cathode Predicted Cathode Reaction

a . Around electrode 1 you see a yellow liquid and a brown liquid falling to the bottom of the cell At electrode 2 a pink shiny deposit is seen on the electrode itself is electrode the anode or the cathode? Explair . Electrode 1 is the because fis electrode 2 the cathode or the anode? Explain Electrode 2 is the because g. What is the pink shiny deposit on electrode 2 due to? h. What is the yellow solution around electrode 1 due to? is the product at the anode the one that is thermodynamically or kinetically favored? Comment 1 What is the minimum cell voltage Ebuery bleeded for electrolysis to occur? (4 Marks) Ettery >

Cathode (Reduction) Half-Reaction H2(g) + 2OH(aq) (pH = 7) Standard Potential E (volts) -0.41 2H2O(1) + 2e - Zn2+ (aq) + 2e - Zn(s) -0.76 2Hac) + 2e - H26) 0.00 Cu2+ (aq) + 2e → Cuis) 0.34 12(s) + 2e2") 0.54 1.36 Claig) + 2e + 2Cl (aq) Br2m + 2e + 2Br (aa) 1.07 0.82 O2(g) + 4H+ (aq) + 4e → 2H2O) (pH = 7) Au+ (aq) + 3e Au(s) 1.50 -0.28 Co2 a) + 2e - Cos) Ag (aq) + e - Ago) 0.80 -0.53 Ga *(aq) + 3e Gas Pb2+ (aq) + 2e Pb(s) -0.13 Nas) -2.71 Na (aq) + e -2.93 K+ (aq) + eks)