1. Calculating EoCell and batteries
January 9, 2018
Calculating EoCell and batteries
Electrochem
Learning Target: I CAN calculate Eocell and determine spontaneity of redox reactions

2. January 9, 2018
Do Now (4 min)
Learning Target: I can calculate Eocell and determine spontaneity of redox reactions
Do Now: (Complete on your DO NOW SHEET):
Balance the following redox reaction via ½ rxn method:
ZnCl2 + Au  AuCl + Zn
Learning Target: I CAN calculate Eocell and determine spontaneity of redox reactions

3. Review: Do Now ZnCl2 + Au  AuCl + Zn January 9, 2018
Learning Target: I CAN calculate Eocell and determine spontaneity of redox reactions

4. announcements Afterschool tutoring – every Wednesday 3 – 4:30 PM
January 9, 2018
announcements
Afterschool tutoring – every Wednesday 3 – 4:30 PM
Final exam: Tuesday and Wednesday, January 16 and 17
PeerGrade: Sign up and log in
Homework due Sunday and tuesday
Learning Target: I CAN calculate Eocell and determine spontaneity of redox reactions

5. January 9, 2018
Pogil: Electrochem
Take 15 min to independently and silently: Read and Annotate pages 1 - 4
Learning Target: I CAN calculate Eocell and determine spontaneity of redox reactions

6. Notes: Calculating EoCell for a reaction
January 9, 2018
Notes: Calculating EoCell for a reaction
Determining standard state cell potentials:
A cell's standard state potential is the potential of the cell under standard state conditions, which is approximated with concentrations of 1 mole per liter (1 M) and pressures of 1 atmosphere at 25oC.
Eocell
Learning Target: I CAN calculate Eocell and determine spontaneity of redox reactions

7. Notes: Calculating EoCell for a reaction
Add
Add the potentials of the half-cells to get the overall standard cell potential.
Look up
Look up the reduction potential for the reverse of the oxidation half-reaction and reverse the sign to obtain the oxidation potential. For the oxidation half-reaction, Eooxidation = -Eoreduction.
Look up the reduction potential, Eoreduction, for the reduction half-reaction in a table of reduction potentials
Write
Write the oxidation and reduction half-reactions for the cell.
Notes: Calculating EoCell for a reaction
January 9, 2018
Learning Target: I CAN calculate Eocell and determine spontaneity of redox reactions

8. Calculating EoCell for a reaction
January 9, 2018
Calculating EoCell for a reaction
Eocell = Eoreduction + Eooxidation
Learning Target: I CAN calculate Eocell and determine spontaneity of redox reactions

9. example: Calculating EoCell for a reaction
January 9, 2018
example: Calculating EoCell for a reaction
Zn(s) + Cu2+ (aq)  Zn2+ (aq) + Cu(s)
Write the half reactions:
Zn  Zn2+ + 2e-
Cu2+ + 2e-  Cu
2) Look up the standard potentials for the reduction ½ rxn
Learning Target: I CAN calculate Eocell and determine spontaneity of redox reactions

10. example: Calculating EoCell for a reaction
January 9, 2018
example: Calculating EoCell for a reaction
Zn  Zn2+ + 2e- Cu2+ + 2e-  Cu 3) Look up standard reduction potential for the reverse of ox rxn and change the sign
Learning Target: I CAN calculate Eocell and determine spontaneity of redox reactions

11. example: Calculating EoCell for a reaction
January 9, 2018
example: Calculating EoCell for a reaction
Zn  Zn2+ + 2e- Cu2+ + 2e-  Cu 4) Add the cell potentials together to get Eocell
Learning Target: I CAN calculate Eocell and determine spontaneity of redox reactions

12. 20 min: Work in PAIRS to complete questions 1 - 4
January 9, 2018
Pogil: Electrochem
20 min: Work in PAIRS to complete questions 1 - 4
Learning Target: I CAN calculate Eocell and determine spontaneity of redox reactions

13. Pogil review Calculating cell potential How to determine spontaneity?
January 9, 2018
Pogil review
Calculating cell potential How to determine spontaneity?
Learning Target: I CAN calculate Eocell and determine spontaneity of redox reactions

14. January 9, 2018
Exit ticket (3 min)
On a separate sheet of paper: What must be the value of Eocell for a redox reaction to be spontaneous?
Learning Target: I CAN calculate Eocell and determine spontaneity of redox reactions