Electrochemistry experiment. The potential: 1)0.46v (Zn-Pb) 2)0.99v (Zn-Cu) -I n

Question

Electrochemistry experiment. The potential: 1)0.46v (Zn-Pb) 2)0.99v (Zn-Cu) -I need to fill the results table. -calculations for theoretical values. -percent errors of experimental values compared to theoretical values.please. Experimental procedure Experiment 2. Galvanic cell 1) The metal pieces are prepared and cleaned the same way as in experiment 1 2) Two beakers containing appropriate solutions are placed next to each other and connected with a weighing paper soaked in saturated KCl solution Construct Cu-Zn, Zn-Pb and Cu-Pb galvanic cells and measure their potential Dept of Chemistry, Korea Univ. Global KU Frontier Spirit Zn | 1.0 M Zn(NO)2 1 1.0 M Cu(NO)2 ICu] Pb 1.0 M Pb(NO)2 110 M Cu(NO) 1Cu n11 1.0 M Zn(NO), I 1.0 M Pb(NO), 11 90 n9 Black wire Red wire

Explanation / Answer

Given:

The potential:

1)0.46v (Zn-Pb) percent error=([0.63-.46]/0.46)*100=15.12%

2)0.99v (Zn-Cu) percent error=([1.1-.99]/1.1)*100=20%

3)0.51v (Pb-Cu)  percent error=([0.51-.047]/0.46)*100=8.6%

half reaction potential Pb2+(aq) + 2 e- --> Pb(s) (E0=-0.13V) Zn(s) --> Zn2+(aq) + 2 e- (E0=0.76V) E0=0.63V Cu2+(aq) + 2 e- --> Cu(s) (E0=0.34V) Zn(s) --> Zn2+(aq) + 2 e- (E0=0.76V) E0=1.1V

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