Redox Quiz
CH 122
KEY
Name
Multiple guess. Circle the letter of the best choice.
1.
In KIO4, the oxidation number of iodine is:
a.
b.
c.
d.
2.
–1
+1
+3
+7
K+1 I+7 O-2
Total -8
Balance the equation below:
Gain 3 e+5
0
3P+
5 HNO3 
+5
3 HPO3 +
+2
5 NO +
1 H2O
Lost 5 e3.
Which element is the most easily oxidized?
a.
b.
c.
d.
4.
Highest on table
Which of the following pairs will NOT react?
a.
b.
c.
d.
5.
Cu
Al
Fe
Ca
Zn(s), CuSO4(aq)
Cu(s), Al2(SO4)3(aq)
Fe(s), AgNO3(aq)
Mg(s), Al2(SO4)3(aq)
Copper lower than aluminum
Which of the following is NOT a redox reaction?
a.
b.
c.
d.
Burning Na in Cl2
Chemical union of Fe and S
Decomposition of KClO3
Neutralization of HCl with NaOH
activity series of metals
K → K+ + e–
Ba → Ba+2 + 2e–
Ca → Ca+2 + 2e–
Na → Na+ + e–
Mg → Mg+2 + 2e–
Al → Al+3 + 3e–
Zn → Zn+2 + 2e–
Cr → Cr+3 + 3e–
Fe → Fe+2 + 2e–
Ni → Ni+2 + 2e–
Sn → Sn+2 + 2e–
Pb → Pb+2 + 2e–
H2 → 2 H+ + 2e–
Cu → Cu+2 + 2e–
As → As+3 + 3e–
Ag → Ag+ + e–
Hg → Hg+2 + 2e–
Au → Au+3 + 3e–