Title: Chem 30-help needed-lab Post by: snowman123 on Nov 7, 2022 Observations:
Cell 1 Zn(s) │Zn2+(aq) ║ Cu2+(aq) │Cu(s) Anode Zn(s)--->Zn2+(aq) Cathode Cu2+(aq)--->Cu(s) Reduction Half Rxn Cu2+(aq) + 2e- --->Cu(s) Oxidation Half Rxn Zn(s) --->Zn2+(aq) +2e- Net Cell Rxn Cu2+(aq) +Zn(s) --->Zn2+(aq)+2e- Predicted Standard Cell Potential 1.1V Observed Cell Potential 1.11V Cell 2 Zn(s) │Zn2+(aq) ║ Fe2+(aq) │Fe(s) Anode Zn(s) -->Zn2+(aq) Cathode Fe2+(aq) --->Fe(s) Reduction Half Rxn Fe2+(aq)+2e--->Fe(s) Oxidation Half Rxn Zn(s)-->Zn2+(aq)+2e Net Cell Rxn Fe2+(aq) +Zn(s)---> Zn2+(aq)+Fe(s) Predicted Standard Cell Potential 0.31V Observed Cell Potential 0.310V 1. Choose two cells from the virtual lab and hand draw a diagram of each cell. Your cell should include two beakers, a salt bridge, wire, voltmeter, anode and cathode. Label the Anode and Cathode Include the direction of electron movement Include direction of cations and anions 2. Compare the predicted standard cell potentials with the observed values. Was there a discrepancy? Provide possible reasons for any differences. 3. Suggest a reason why very small voltaic cells were constructed for this investigation. 4. Would you expect a difference in the cell potential had larger cells been constructed and tested? Suggest an aspect of a cell’s function that may be affected by using a larger cell that contains a greater quantity of chemicals. 5. A Ni-Cd rechargeable cell has a cell potential of +1.30V. If the cathode has a potential of +0.49 V, what is the anode’s potential? Title: Re: Chem 30-help needed-lab Post by: bio_man on Nov 7, 2022 Hello
Is this the document you're looking for? I believe it contains the answers for each of the questions. Title: Re: Chem 30-help needed-lab Post by: snowman123 on Nov 7, 2022 Thank you sm!
I still need the labelled diagrams of the cells. (quesiton 1) ? Title: Re: Chem 30-help needed-lab Post by: Sarahb22 on Apr 26, 2023 Thanks
Title: Re: Chem 30-help needed-lab Post by: bio_man on May 3, 2023 Choose two cells from the virtual lab and hand draw a diagram of each cell. Your cell should Hi bro, here's my attempt |