272 Experiment 19 The Electrochemical C Analysis 1 Report The Value Of The Reduction Potential Based On Your Results F 1 (50.59 KiB) Viewed 86 times
272 Experiment 19 The Electrochemical C Analysis 1 Report The Value Of The Reduction Potential Based On Your Results F 2 (46.09 KiB) Viewed 86 times
272 EXPERIMENT 19 The Electrochemical C. Analysis 1. Report the value of the reduction potential based on your results from Part I Use Equation (19-5). and the knowledge that EZ2Z) = -0.76 V LA. Fei Fe -0.49V 1.B. Cu? Cu +0.15V IC. Mg2+Mg -12V Note that in the case above where zinc is not the anode, you will need to returite Equation (19-5) appropriately. 2. Use the data from Question 1 above to predict the cell voltages below. List the experimentally observed values from Part II in the second column, and give the percentage error in the third column. Predicted Observed Percentage value from value from data in Part 1 Part 11 Fe Felt Cu Cu? Mg/Mg?||Fe|Fet Mg|Mg?*|Cu Cu2+ 3. Compare the reduction potentials calculated in Part I with values for the standard state taken from a reference of your choice. Reference consulted (give full bibliographic record): error Value Literature Percentage determined value for error in Part 1 standard state Fe2+ Fe Cu-Cu Mg2+ | Mg 4. Use Equation (19-7) to give a predicted call for each of the concentration cells in Part III, and com- pare your results to the observed value. Calculated Observed Percentage value from value from Equation (19-7) Part III Cell Potential for ZnZn2+ (0.1M)||Zn2+(1.0M) Zn Cell Potential for ZnZn?" (0.1M)||Zn? (0.50 M) Zn error
Data Part I: Trial 1 0.27v 0.2N 1.A. Cell Potential for Zn | Zn2+ ||Fe2+ | Fe I.B. Cell Potential for Zn/Zn?' ||Cu2+ Cu 0.91V 0.90 tak I.C. Cell Potential for Mg Mg?"||ZnZn2+ 0.43 v 0.45V Part II: Trial 2 1 0.64V 1 - 1 0.62v II.A. Cell Potential for Fe|Fe2+ Cu2Cu II.B. Cell Potential for Mg|Mg? || Fe2* | Fe II.C. Cell Potential for Mg Mg2+ ||Cu?* | Cu 0.72 0.727 1.34v 1.35V Part III: Trial 2 1 3 Cell Potential for ZnZn2+ (0.1M) ||Zn2+(1.0 M)|Zn 0.03 v 0.02V Cell Potential for ZnZn2+ (0.1M) ||Zn2+ (0.5 M) Zn 0.06V OGOSV <
Join a community of subject matter experts. Register for FREE to view solutions, replies, and use search function. Request answer by replying!