Q3. Calculate the standard potential when the two half-cells below

Q3. Calculate the standard potential when the two half-cells below
are connected via a salt bridge and potentiometer. Which species are the reducing agent and oxidizing agent? (4 Points)
+ 2 H+ + 2 e- ⇋ + H2O E° = 1.589 V
Mg(OH)2 (s) + 2 e- ⇋ Mg (s) + 2 OH- E° = -2.690 V
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Q4. Calculate Eo and K for the cell composed of a bromate/bromide half-cell and a chlorate/chlorine dioxide half-cell. (4 Points)
+ 2 H+ + e− ⇋ ClO2 + H2O E° = 1.130 V
+ 3 H2O + 6 e− ⇋ Br− + 6 OH− E° = 0.613 V
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Q5. Calculate E° and K for each of the following reactions. (3 Points)
(a) Cr2+ + Fe(s) ⇌ Fe2+ + Cr(s) (b) Mg(s) + Cl2(g) ⇌ Mg2+ + 2°Cl−
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Q6. Convert the following potentials. The Ag | AgCl and calomel reference electrodes are saturated with KCl. (3 Points)
(a) −0.111 V versus Ag | AgCl = ? versus S.H.E. (b) −0.222 V versus S.C.E. = ? versus S.H.E.
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Q7. If the measured potential of a half-cell is 0.584 V when measured against the S.C.E, what is the potential if the measurement is made using the saturated Ag-AgCl reference electrode? E = 0.197 V for the saturated Ag-AgCl electrode and E = 0.241 V for the S.C.E. (3 Points)
 
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