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You try this! Create and label: O 2 ½ cell and Cr (s) ½ cell (neutral conditions)

V. _. _. You try this! Create and label: O 2 ½ cell and Cr (s) ½ cell (neutral conditions). V. _. _. You try this! Create and label: O 2 ½ cell and Cr (s) ½ cell (neutral conditions). O 2 bubbled in. O 2 ½ cell. V. _. _.

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You try this! Create and label: O 2 ½ cell and Cr (s) ½ cell (neutral conditions)

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  1. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions)

  2. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) O2 bubbled in O2 ½ cell

  3. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) O2 bubbled in O2 ½ cell NaCl Na+,Cl-

  4. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) Pt(s) O2 bubbled in O2 ½ cell NaCl

  5. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) Pt(s) O2 bubbled in Cr ½ cell O2 ½ cell NaCl

  6. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) Pt(s) Cr(s) O2 bubbled in Cr ½ cell O2 ½ cell NaCl

  7. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) Pt(s) Cr(s) O2 bubbled in Cr ½ cell O2 ½ cell Cr(NO3)3 Cr3+, NO3- NaCl

  8. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) Pt(s) KNO3 Cr(s) O2 bubbled in Cr ½ cell O2 ½ cell Cr(NO3)3 Cr3+, NO3- NaCl

  9. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) Pt(s) KNO3 Cr(s) O2 bubbled in Cr ½ cell O2 ½ cell Cr(NO3)3 Cr3+, NO3- NaCl O2, Na+, Cl-, Pt, K+, NO3-, Cr(s), Cr3+

  10. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) Pt(s) KNO3 Cr(s) O2 bubbled in Cr ½ cell O2 ½ cell Cr(NO3)3 Cr3+, NO3- NaCl O2, Na+, Cl-, Pt, K+, NO3-, Cr(s), Cr3+ OA OA RA --- OA ----- RA OA

  11. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) Pt(s) KNO3 Cr(s) O2 bubbled in Cr ½ cell O2 ½ cell Cr(NO3)3 Cr3+, NO3- NaCl O2, Na+, Cl-, Pt, K+, NO3-, Cr(s), Cr3+ SOA OA RA --- OA ----- SRA OA

  12. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) Anode Pt(s) KNO3 Cr(s) O2 bubbled in Cr ½ cell O2 ½ cell Cr(NO3)3 Cr3+, NO3- NaCl O2, Na+, Cl-, Pt, K+, NO3-, Cr(s), Cr3+ SOA OA RA --- OA ----- SRA OA

  13. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) Cathode Anode Pt(s) KNO3 Cr(s) O2 bubbled in Cr ½ cell O2 ½ cell Cr(NO3)3 Cr3+, NO3- NaCl O2, Na+, Cl-, Pt, K+, NO3-, Cr(s), Cr3+ SOA OA RA --- OA ----- SRA OA

  14. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) e- Cathode Anode Pt(s) KNO3 Cr(s) O2 bubbled in Cr ½ cell O2 ½ cell Cr(NO3)3 Cr3+, NO3- NaCl O2, Na+, Cl-, Pt, K+, NO3-, Cr(s), Cr3+ SOA OA RA --- OA ----- SRA OA

  15. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) e- Cathode Anode Pt(s) KNO3 Cr(s) O2 bubbled in K+ NO3- Cr ½ cell O2 ½ cell Cr(NO3)3 Cr3+, NO3- NaCl O2, Na+, Cl-, Pt, K+, NO3-, Cr(s), Cr3+ SOA OA RA --- OA ----- SRA OA

  16. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) e- Cathode Anode Pt(s) KNO3 Cr(s) O2 bubbled in K+ NO3- Cr ½ cell O2 ½ cell Cr(NO3)3 Cr3+, NO3- NaCl 1/2O2(g) +2H+(10-7M) + 2e- H2O Cr(s) Cr3+ + 3e- O2, Na+, Cl-, Pt, K+, NO3-, Cr(s), Cr3+ SOA OA RA --- OA ----- SRA OA

  17. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) e- Cathode Anode Pt(s) KNO3 Cr(s) O2 bubbled in K+ NO3- - + Cr ½ cell O2 ½ cell Cr(NO3)3 Cr3+, NO3- NaCl 1/2O2(g) +2H+(10-7M) + 2e- H2O Cr(s) Cr3+ + 3e- O2, Na+, Cl-, Pt, K+, NO3-, Cr(s), Cr3+ SOA OA RA --- OA ----- SRA OA

  18. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) e- Cathode Anode Pt(s) KNO3 Cr(s) O2 bubbled in K+ NO3- - + Cr ½ cell O2 ½ cell Cr(NO3)3 Cr3+, NO3- NaCl 1/2O2(g) +2H+(10-7M) + 2e- H2O Cr(s) Cr3+ + 3e- O2, Na+, Cl-, Pt, K+, NO3-, Cr(s), Cr3+ SOA OA RA --- OA ----- SRA OA 1/2O2(g) +2H+(10-7M) + 2e- H2O Eored=+0.82V Cr(s) Cr3+ + 3e- Eoox=+0.74V

  19. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) e- Cathode Anode Pt(s) KNO3 Cr(s) O2 bubbled in K+ NO3- - + Cr ½ cell O2 ½ cell Cr(NO3)3 Cr3+, NO3- NaCl 1/2O2(g) +2H+(10-7M) + 2e- H2O Cr(s) Cr3+ + 3e- O2, Na+, Cl-, Pt, K+, NO3-, Cr(s), Cr3+ SOA OA RA --- OA ----- SRA OA (1/2O2(g) +2H+(10-7M) + 2e- H2O)x3 Eored=+0.82V (Cr(s) Cr3+ + 3e-)x2Eoox=+0.74V

  20. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) e- Cathode Anode Pt(s) KNO3 Cr(s) O2 bubbled in K+ NO3- - + Cr ½ cell O2 ½ cell Cr(NO3)3 Cr3+, NO3- NaCl 1/2O2(g) +2H+(10-7M) + 2e- H2O Cr(s) Cr3+ + 3e- O2, Na+, Cl-, Pt, K+, NO3-, Cr(s), Cr3+ SOA OA RA --- OA ----- SRA OA 3/2O2(g) +6H+(10-7M) +6e- 3H2O Eored=+0.82V 2Cr(s) 2Cr3+ + 6e-Eoox=+0.74V

  21. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) e- Cathode Anode Pt(s) KNO3 Cr(s) O2 bubbled in K+ NO3- - + Cr ½ cell O2 ½ cell Cr(NO3)3 Cr3+, NO3- NaCl 1/2O2(g) +2H+(10-7M) + 2e- H2O Cr(s) Cr3+ + 3e- O2, Na+, Cl-, Pt, K+, NO3-, Cr(s), Cr3+ SOA OA RA --- OA ----- SRA OA 3/2O2(g) +6H+(10-7M) +6e- 3H2O Eored=+0.82V + 2Cr(s) 2Cr3+ + 6e-Eoox=+0.74V 3/2O2(g) +6H+(10-7M) +2Cr(s) 3H2O+2Cr3+ Eo=+1.56V

  22. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) e- Cathode Anode Pt(s) KNO3 Cr(s) O2 bubbled in K+ NO3- - + Cr ½ cell O2 ½ cell Cr(NO3)3 Cr3+, NO3- NaCl 1/2O2(g) +2H+(10-7M) + 2e- H2O Cr(s) Cr3+ + 3e- O2, Na+, Cl-, Pt, K+, NO3-, Cr(s), Cr3+ SOA OA RA --- OA ----- SRA OA 3/2O2(g) +6H+(10-7M) +6e- 3H2O Eored=+0.82V + 2Cr(s) 2Cr3+ + 6e-Eoox=+0.74V (3/2O2(g) +6H+(10-7M) +2Cr(s) 3H2O+2Cr3+)x2 Eo=+1.56V 3O2(g) +12H+(10-7M) +4Cr(s) 6H2O+4Cr3+

  23. V _ _ You try this! Create and label: O2 ½ cell and Cr(s) ½ cell (neutral conditions) e- Cathode Anode Pt(s) KNO3 Cr(s) O2 bubbled in K+ NO3- - + Cr ½ cell O2 ½ cell Cr(NO3)3 Cr3+, NO3- NaCl Mass decreases corrosion pH increases 1/2O2(g) +2H+(10-7M) + 2e- H2O Cr(s) Cr3+ + 3e- O2, Na+, Cl-, Pt, K+, NO3-, Cr(s), Cr3+ SOA OA RA --- OA ----- SRA OA 3/2O2(g) +6H+(10-7M) +6e- 3H2O Eored=+0.82V + 2Cr(s) 2Cr3+ + 6e-Eoox=+0.74V 3/2O2(g) +6H+(10-7M) +2Cr(s) 3H2O+2Cr3+ Eo=+1.56V 3O2(g) +12H+(10-7M) +4Cr(s) 6H2O+4Cr3+

  24. And Now, your homework!!!!!

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