L.E.O. G.E.R. - New Providence School District · 1 Electrochemistry L.E.O. G.E.R. Cu Cu2+ + 2e...
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1 Electrochemistry L.E.O. G.E.R. Cu Cu 2+ + 2e Fe 3+ +e Fe 2+ Al + CuCl 2 Al Cl 3 + Cu Fe Cl 3 +H 2 S Fe Cl 2 + S + HCl Cr 2 O 7 2 (aq) + Cl (aq) Cr 3+ (aq) + Cl 2(g) (acidic) MnO 4 - + SO 3 2- → Mn 2+ + SO 4 2- (acidic) Cr + Cl O 4 - → Cr O 2 - + Cl O 3 - (basic) H 2 O H + "OTHER" O H e OH
Transcript of L.E.O. G.E.R. - New Providence School District · 1 Electrochemistry L.E.O. G.E.R. Cu Cu2+ + 2e...
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Electrochemistry
L.E.O.
G.E.R.
Cu Cu2+ + 2e
Fe3+ + e Fe2+
Al + CuCl2 AlCl3 + Cu
FeCl3 + H2S FeCl2 + S + HCl
Cr2O72(aq)+ Cl(aq) Cr3+(aq)+ Cl2(g) (acidic)
MnO4− + SO32− → Mn2+ + SO42− (acidic)
Cr + ClO4− → CrO2− + ClO3− (basic)
H2O H+
"OTHER" O H e OH
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Standard Reduction Potentials
Galvanic Cell
Why 1.10 V? Zn(s)|Zn2+(aq) ||Cu2+(aq) |Cu(s)anode cathode
Ni Al
Ni2+ Al3+
Fe Ag
Fe Au
Au1+Fe3+
Ni Cu
Cu2+Ni2+
Fe3+ Ag+
3
F = 96,485
ΔGo = n F Eo
Spontaneity
Cmol
Eo = +Eo =
# of e stransferred
4
The Nerst Equation
= 0.0592n log Q
@ 25oC
EoEcell
Q = K at equilibrium
Ecell = 0therefore
MnAl