Number 2 Lab #21-ElectrochemicalCellsred=inpertblack = commonObjective: I will measure the potential difference of dissimilar metals.Background:Materials:♦....VoltmeterCoffee FilterVinegarZinc ZnIron PbCu red***Cu blackPb black 558.5Sn black566.9Zn blackAl blackMg black1.0020.6621.741Procedure:1. Flatten the coffee filter on your lab desk, and dampen it completely with vinegar.2. Place the 6 metal samples evenly spaced on the outside edge of the coffee filter.3. Set the voltmeter to DC volts.4. Firmly press the positive and negative electrodes into the metals.5. Record the voltage in the data table. Note: The voltage will drop over time. Record the highestvoltage that you see.6. Reverse the electrodes, and record the voltage in the data table.7. Determine and record the potential differences of all other combinations of metals.Data Collection:36.8-430.2-81.3-1,156..-.463.8113.11.196ZineErd=-0.76 VCopper | Ered = +0.34 V.Measured Potential DifferencePb red Sn redZn red|-5456-530.2 -1.009220229 37.9 -444.9-465,6MagnesiumTin AnAluminum ACopper Cu-361,7Al redMg red-0,642 -1.707-74.20.708 |-1.143-99,11. 171370.9 -0.691,048-1.659Conclusion Questions:1. A battery is made using zinc and copper. Determine and label the balanced oxidation andreduction half-reactions.2. The accepted standard reduction potentials for copper and zinc are listed below. What is theaccepted value for the Fell?C

Element having higher value of reduction potential will undergo reduction easily and hence act as…

Answered: reduction half-reactions. 2. The…

reduction half-reactions. 2. The accepted standard reduction potentials for copper and zinc are listed below. What is the accepted value for the Fell? Zinc Copper Ed=-0.76 V Ea= +0.34 V

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter18: Electrochemistry

Section: Chapter Questions

Problem 147CP

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