Electrochemical cell lab Aim Essay

Custom Student Mr. Teacher ENG 1001-04 11 November 2017

Electrochemical cell lab Aim

Aim :- To find out the feasibility of a redox reaction by looking at the cell potential of the reaction .

Quantitative observation

The table below shows the values of cell potential that were recorded when the experiment was performed

Reaction

Cell potential (±0.01V)

CuSO4 and ZnSO4

0.99V

CuSO4 and AgNO3

0.64V

Ag

1.39V

Qualitative Observation

Reaction

Obsevrations

CuSO4 and ZnSO4

Copper sulphate turns from clear to blue , whereas zinc sulphate remains colorless

CuSO4 and AgNO3

Copper sulphate is blue in color , silver nitrate is colorless

Ag

Data processing

Experiment 1

Zn(s) -> Zn2+ (aq) + 2e- (aq)

Cu2+ (aq) + 2e- (aq) -> Cu (s)

Cu2+ (aq) + Zn(s) -> Cu(s) + Zn2+ (aq)

Experiment 2

Cu(s) -> Cu2+ (aq)+ 2e- (aq)

Ag+(aq) + e- (aq) -> Ag(s)

Cu(s) + 2Ag+ (aq) -> Cu2+ (Aq) + 2Ag (s)

Experiment 3

Zn(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 respective cell potential

Reaction

Cell potential (±0.01V)

CuSO4 and ZnSO4

0.34V

CuSO4 and AgNO3

0.46 V.

Ag

1.10 V

Error 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 also

The table below shows the respective error percentages of each of the cell potential

Reaction

Error percentage

CuSO4 and ZnSO4

191.17%

CuSO4 and AgNO3

39.13%

Ag

16.36%

Theory

Electrochemical cells

In an electrochemical cell, electricity is produced through chemical reactions. There consist two electrodes: – the negative electrode and the positive electrode. At the negative electrode

Free Electrochemical cell lab Aim Essay Sample

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  • University/College: University of Chicago

  • Type of paper: Thesis/Dissertation Chapter

  • Date: 11 November 2017

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