4. Balance the following redox reactions that occur in
basic solution using the half-reaction method.
a. PO33-(aq) + MnO4-(aq) → PO43-(aq) +
MnO2(s)
b. Mg(s) + OCl-(aq) → Mg(OH)2(s) + Cl-(aq)
c. H2CO(aq) + Ag(NH3)2+(aq) → HCO3-(aq) + Ag(s) +
NH3(aq)
Balance the half-reactions assuming that they occur in acidic
solution.Express your answer as a balanced half-reaction. Identify
all of the phases in your answer.
1) NO3−(aq)→NO(g)
2)Zn(s)→Zn2+(aq)
3)Te(s)→TeO2(s)
4)Sn4+(aq)→Sn2+(aq)
(a) Balance the following half-reactions by the ion-electron
half-reaction method:
(i) (acid solution) NO3 – (aq) → N2O (g)
(ii) (acid solution) FeO4 2– (aq) → Fe3+ (aq)
(iii) (base solution) Fe2O3 (s) → Fe(OH)2 (s)
(iv) (base solution) Cu2O (s) → Cu(OH)2 (s)
(b) Which of the above equations are oxidation
half-reactions?
(c) Give the formulas of the reactants that become oxidized in
the course of the reaction.
Consider the following reactions. reaction
MnO4−(aq) + Cl−(aq) → MnO2(s) + ClO3−(aq) in basic solution
Balance each equation under the specified conditions
Balance the following,
in basic solution, by the method of half reactions.
C2H5OH +MnO4-
-->C2H3O2-
+MnO2,
What is the
coefficient on water (H2O) in the product of the
balanced equation?
Suppose that you have to balance the following half-reaction in
basic solution.
Cr2O72??(aq) ?
Cr3+?(aq)
What is the coefficient on water of the final balanced half-cell
reaction?
A) 5
B) 6
C) 7
D) 8
3. Balance the following redox reactions that occur in
acidic solution using the half-reaction method.
a. Cr(s) + NO3-(aq) → Cr3+(aq) + NO(g)
b. CH3OH(aq) + Ce4+(aq) → CO2(aq) +
Ce3+(aq)
c. SO32-(aq) + MnO4-(aq) → SO42-(aq) +
Mn2+(aq)
The following two half-reactions occur in a standard alkaline
battery:
Zn(s) + 2OH-(aq) → ZnO(aq) + H2O(l) +
2e-
MnO2(s) + H2O(l) + e- →
MnO(OH)(s) + OH-(aq)
(a) Describe how the spontaneous flow of
electrons occurs in a simple battery (2 pts).
(b) Identify the cathode and anode of the
standard alkaline battery (2 pts).
(c) Identify the element that is oxidized
and the element that is reduced (2 pts).
(d) Identify the species that acts as the
oxidizing agent and the species...