Chem March 24 2014 Redox review
1
A reaction between Hydrogen and Fluorine takes place. Which one is oxidized and which one is reduced?
The reaction between hydrogen and fluorine is an example of an oxidationreduction reaction:
H2 + F2 → 2 HF
The overall reaction may be written as two halfreactions:
H2 → 2H+ + 2e− (the oxidation reaction) E= 0.00V
F2 + 2e− → 2F− (the reduction reaction) E= 2.87V
There is no net change in charge in a redox reaction so the excess electrons in the oxidation reaction must equal the number of electrons consumed by the reduction reaction. The ions combine to form hydrogen fluoride:
H2 + F2 → 2H+ + 2F− → 2HF E = 0.00V + 2.87V= 2.87V
Chem March 24 2014 Redox review
2
What about a reaction between Cu and Ag?
Cu is coming from a solution of CuSO4
Chem March 24 2014 Redox review
3
Galvanic cell
Extra explanation: http://www.youtube.com/watch?v=J1ljxodF9_g
How the cell works: http://www.youtube.com/watch?v=vJpl2BQoJo
What about a reaction between Ag and Zn?
Chem March 24 2014 Redox review
4
What about Magnesium and Hydrogen?
Chem March 24 2014 Redox review
5
Zinc and hydrogen?
Chem March 24 2014 Redox review
6
Nickel and hydrogen?
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