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Saturday, March 2, 2019

Electrochemical cell lab Aim Essay

Aim - To find out the feasibility of a oxidoreduction response by looking at the cell dominance of the reaction .Quantitative observationThe table below shows the determines of cell potential that were recorded when the experiment was performedReactionCell potential (0.01V)CuSO4 and ZnSO40.99VCuSO4 and AgNO30.64VAg1.39Vqualitative ObservationReactionObsevrationsCuSO4 and ZnSO4Copper sulphate turns from clear to blue , whereas atomic number 30 sulphate remains colorlessCuSO4 and AgNO3Copper sulphate is blue in color , silver nitrate is colorlessAgData impact test 1Zn(s) - Zn2+ (aq) + 2e- (aq)Cu2+ (aq) + 2e- (aq) - Cu (s)Cu2+ (aq) + Zn(s) - Cu(s) + Zn2+ (aq)Experiment 2Cu(s) - Cu2+ (aq)+ 2e- (aq)Ag+(aq) + e- (aq) - Ag(s)Cu(s) + 2Ag+ (aq) - Cu2+ (Aq) + 2Ag (s)Experiment 3Zn(s) - Zn2+ (aq) + 2e- (aq)Ag+ (aq) + e- (aq)- Ag(s)Zn(s) + 2Ag+ (aq) - Zn2+ (aq) + 2Ag (s)The table below shows the literature values for the individual cell potentialReactionCell potential (0.01V)CuSO4 and ZnSO 40.34VCuSO4 and AgNO30.46 V.Ag1.10 VError percentage= (difference between the literature and experimental value)/(the literature value )x100= (0.34V 0.99V)/(0.34V) x100= 191.17%We can similarly find the error percentages for other cell potentials alsoThe table below shows the respective error percentages of severally of the cell potentialReactionError percentageCuSO4 and ZnSO4191.17%CuSO4 and AgNO339.13%Ag16.36% surmisalElectrochemical cellsIn an electrochemical cell, electricity is produced through chemical reactions. in that respect consist two electrodes the negative electrode and the positive electrode. At the negative electrode

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