CHEM 107 Lecture 35: Redox Reactivity

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10 Mar 2017
School
Department
Course
Redox Reactivity
Friday, March 10, 2017
9:56 AM
Redox Reactivity
Mg (s) + Cu2+ (aq) → Mg2+ (aq) + Cu(s)
Cu(s) + Mg2+(aq) → no reaction
Practice:
Which metal has the least tendency to be oxidized
a. Sn
b. Mg
c. Cu
d. Fe
Which metal is the best reducing agent?
a. Sn
b. Mg
c. Cu
d. Fe
Write the reaction of nickel dissolving in acid:
Oxidation half-reaction:
Ni(s) → Ni2+ + 2e-
Reduction half-reaction:
2H+ + 2e- → H2(g)
The electrons cancel…so we get…
Ni(s) + 2H+ (aq) → Ni2+ + H2(g)
Electrochemical Cells:
Electrochemical cell
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