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## Redox Reactions

1.
Which of the following chemical equations represents a redox reaction?
1. $CH_3COOH + NaOH -> CH_3COONa + H_2O$
2. $Cl^(-) + Ag^(+) ->AgCl darr$
3. $5Fe^(2+) + MnO_4^(1-) + 8H_3O^+ rArr6Fe^(3+) + Mn^(2+) + 12H_2O$
4. $HCl + NaOH -> NaCl + H_2O$
2.
What is one characteristic feature of an oxidizing agent?
1. It undergoes reduction
2. Causes reduction
3. Donates electron
4. It itself undergoes oxidation
3.
Which of the following represents a redox reaction?
1. $2AgClO_3 rarr 2AgCl + 3O_2$
2. $KOH + HCl rarr H_2O + KCl$
3. $Pb(NO_3)_2 + 2KCl rarr PbCl_2 + 2KNO_3$
4. $LiCl rarr Li^+ + Br^-$
4.
Identify the oxidant in the following reaction:
$3H_3AsO_3(aq) + BrO_3^(-) (aq) rarr Br^(-) (aq) + 3H_3AsO_4(aq)$
1. $BrO_3^(-) (aq)$
2. $H_3AsO_3$
3. $Br^(_) (aq)$
4. $H_3AsO_4$
5.
Identify the reducing agent in the following reaction:

$I_2(aq) + 2S_2O_3^(2-) (aq) rarr S_4O_6^(2-) (aq) + 2I^(-) (aq)$
1. $(S_2O_3)^(2-)$
2. $I_2$
3. $(S_4O_6)^(2-)$
4. $I^(-)$
6.
Identify the oxidant in the following reaction:

$C_4H_4O_6^(2-) (aq) + ClO_3^(-) (aq) rarr CO_3^(2-) (aq) + Cl^(-) (aq)$
1. $(ClO_3)^(-)$
2. $(C_6H_4O_6)^(2-)$
3. $(CO_3)^(2-)$
4. $Cl^(_)$
7.
Consider the following redox reaction

$H_2C_2O_4 (aq) + MnO_4^(-) (aq) rarr CO_2(g) + Mn^(2+) (aq)$

What is the reduction half reaction for this redox reaction?
1. $(Mn)^(7+) (aq) rarr Mn^(2+) (aq)$
2. $H_2C_2O_4 (aq) rarr CO_2(g)$
3. $(MnO_4)^(-) (aq) + 8H^(+) (aq) rarr Mn^(2+) (aq) + 4H_2O (l)$
4. $H_2C_2O_4 (aq) rarr 2CO_2 (g) + 2H^(+) (aq)$
8.
Which of the following half-reactions involves oxidation?
1. Fe in $Fe(OH)_2 rarr Fe(OH)_3$
2. V in $VO^(2+) (aq) rarr V^(3+) (aq)$
3. Cl in $OCl^(-) (aq) rarr Cl^(-) (aq)$
9.
Which of the following represents the correct oxidation half-reaction for the following redox reaction?

$Zn + H_2O rarr ZnO + H_2$
1. $H_2 rarr 2H^+ + 2e^-$
2. $2H^+ + 2e^{-} rarr H_2$
3. $Zn rarr Zn^{2+} + 2e^-$
4. $Zn^{2+} + 2e^{-} rarr 2Zn^0$
10.
Al +           $Zn^{2+} rarr$           $Al^{3+}$ +           Zn
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