write out the half reactions the net chemical reaction and the e Pb(2+) + 2e ->
ID: 922395 • Letter: W
Question
write out the half reactions the net chemical reaction and the e
Pb(2+) + 2e -> Pb -.13
Ag(+) + e -> Ag .8
Fe (2+) +2e -> Fe -.45
CU(2+) + 2e -> Cu .34
UTA-550e Name Section Date PRELAB PROBLEMS EXPERIMENT UTA-550 1. Write out the half reactions, the net chemical electrochemical cell: rite out the half reactions, the net chemical reaction and the E° for the following Pb (s)| Pb2 (aq), 1.0 M I| Ag' (aq), 1.0 MI Ag (s) 2. W electrochemical cell: rite out the half reactions, the net chemical reaction and the E for the following Fe () Fe (aq), 0.250 MCu (aq), 1.05 M| Cu (s) cribe how you would make 225 mL of a 0.10 M magnesium sulfate solution using a common 3. Des soluble salt.Explanation / Answer
1)
-0.13
0.80
Eo=0.8+0.13
=0.93
E=0.93-(0.059/2)*log(1/1^2)
=0.93
2)
Fe (2+) +2e -> Fe -.45
CU(2+) + 2e -> Cu .34
E=0.45+0.34
=0.89
E=Eo-(0.059/2)*log(0.25/1.05)
=0.89-(0.059/2)*log(0.25/1.05)
=0.91
Pb2+(aq) + 2e- -> Pb(s)-0.13
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