448
4 (a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
(0
(J)
(k)
(D
(m)
(n)
(o)
5 (a)
Zn + Cu
2+ -> Zn
2+ + Cu
Zn + 2H+ -» Zn
2+ + H 2
Cr 2 O
2 - + 6r + 14H+ -> 2Cr
3+ + 3I 2
2MnO 4 - + 10C1- + 16H
+ -> 2Mn
2+ +
C1O 3 - + 6Br- + 6H+ -> Cl~ + 3Br 2 4
2MnO 4 - + 5H 2 O 2 + 6H
+ -» 2Mn
2+ +
MnO 2 + 4H
+ + 2C1- -^ Mn
2+ + C1 2
3Ag + 4H
+ + NO 3 - ->• 3Ag
+ + NO +
PbO 2 + Sn
2+ + 4H
+ -^ Pb
2+ + Sn
4+
2MnO 4 ~ + 5H 2 C 2 O 4 + 6H
+ -^ 2Mn
2+
H 2 O 2 + HNO 2 -> H
+ + NO 3 - + H 2 O
Fe + Cu
2+ -» Fe
2+ + Cu
2Fe
3+ + 21- -» 2Fe
2+ + I 2
ClOf + 4H 3 AsO 3 -> Cl- + 4H 3 AsO 4
H 2 S + CIO- -^ S + Cl- + H 2 O
Zn + CuSO 4 -> ZnSO 4 + Cu
Answers t<
+ 7H 2 O
5C1 2 + 8H 2 O
3H 2 O
5O 2 + 8H 2 O
+ 2H 2 O
2H 2 O
+ 2H 2 O
+ 10CO 2 + 8H 2 O
(b) Zn + H 2 SO 4 -> ZnSO 4 + H 2
(c) K 2 Cr 2 O 7 + 6KI + 7H 2 SO 4 -> Cr 2 (SO 4 ) 3 + 3I 2 + 4K 2 SO 4 + 7H 2 O
(d) 2KMnO 4 + 10KC1 + 8H 2 SO 4 -» 2MnSO 4 + 5C1 2 + 6K 2 SO 4 + 8H 2 O
(e) KC1O 3 + 6KBr + 3H 2 SO 4 -» KC1 + 3Br 2 + 3K 2 SO 4 + 3H 2 O
(f) 2KMnO 4 + 5H 2 O 2 + 3H 2 SO 4 -^ 2MnSO 4 + 5O 2 + K 2 SO 4 + 8H 2 O
(g) MnO 2 + 2KC1 + 2H 2 SO 4 -» MnSO 4 + C1 2 + K 2 SO 4 + 2H 2 O
(h) 3Ag + 4HNO 3 -^ 3AgNO 3 + NO + 2H 2 O
(i) PbO 2 + SnSO 4 + 2H 2 SO 4 -^ PbSO 4 + Sn(SO 4 ) 2 + 2H 2 O
0) 2KMnO 4 + 5H 2 C 2 O 4 + 3H 2 SO 4 -> 2MnSO 4 + 10CO 2 + K 2 SO 4 + 8H 2 O
(k) H 2 O 2 + HNO 2 -> HNO 3 + H 2 O
(1) Fe + CuSO 4 -» FeSO 4 + Cu
(m) 2Fe 2 (SO 4 ) 3 + 2KI -^ 2FeSO 4 + I 2 + K 2 SO 4
(n) KC1O 4 + 4H 3 AsO 3 -^ KC1 + 4H 3 AsO 4
(o) H 2 S + KC1O -> S + KC1 + H 2 O
6 (a) CH 2 O + Ag 2 O + OH~ -^ 2Ag + HCO 2 - + H 2 O
(b) C 2 H 2 + 2MnO 4 - + 6H
+ -^ 2CO 2 + 2Mn
2+ + 4H 2 O
(c) 2C 2 H 3 OC1 + 3Cr 2 O
2 ~ + 24H
+ -> 4CO 2 + C1 2 + 6Cr
3+ + 15H 2 O
(d) 6Ag
+ + AsH 3 + 3H 2 O -^ 6Ag + H 3 AsO 3 + 6H
+
(e) 2OH- + CN- + 2Fe(CN)i~ -^ CNO~ + 2Fe(CN)| + H 2 O
(f) 3C 2 H 4 O + 2NO 3 - + 2H
+ -» 2NO + 3C 2 H 4 O 2 + H 2 O
7 (a) 4Zn + 10H+ + NO 3 - -^ 4Zn
2+ + NH 4 + + 3H 2 O
(b) 2S 2 0 3
2
- + I 2 -» S 4 O|- + 21(c) IO 3 - + 51- + 6H
+ -^ 3I 2 + 3H 2 O
(d) Cu + 2H 2 SO 4 -^ CuSO 4 + SO 2 + 2H 2 O
(e) Zn + 2Fe
3+ -^ 2Fe
2+ + Zn
2+
(f) 81- + 5H 2 SO 4 -^ 4I 2 + H 2 S + 4SO|- + 4H 2 O
(g) 3C1O- -^ 2C1- + C10 3
8 See page 456 for answers to this problem
4 (a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
(0
(J)
(k)
(D
(m)
(n)
(o)
5 (a)
Zn + Cu
2+ -> Zn
2+ + Cu
Zn + 2H+ -» Zn
2+ + H 2
Cr 2 O
2 - + 6r + 14H+ -> 2Cr
3+ + 3I 2
2MnO 4 - + 10C1- + 16H
+ -> 2Mn
2+ +
C1O 3 - + 6Br- + 6H+ -> Cl~ + 3Br 2 4
2MnO 4 - + 5H 2 O 2 + 6H
+ -» 2Mn
2+ +
MnO 2 + 4H
+ + 2C1- -^ Mn
2+ + C1 2
3Ag + 4H
+ + NO 3 - ->• 3Ag
+ + NO +
PbO 2 + Sn
2+ + 4H
+ -^ Pb
2+ + Sn
4+
2MnO 4 ~ + 5H 2 C 2 O 4 + 6H
+ -^ 2Mn
2+
H 2 O 2 + HNO 2 -> H
+ + NO 3 - + H 2 O
Fe + Cu
2+ -» Fe
2+ + Cu
2Fe
3+ + 21- -» 2Fe
2+ + I 2
ClOf + 4H 3 AsO 3 -> Cl- + 4H 3 AsO 4
H 2 S + CIO- -^ S + Cl- + H 2 O
Zn + CuSO 4 -> ZnSO 4 + Cu
Answers t<
+ 7H 2 O
5C1 2 + 8H 2 O
3H 2 O
5O 2 + 8H 2 O
+ 2H 2 O
2H 2 O
+ 2H 2 O
+ 10CO 2 + 8H 2 O
(b) Zn + H 2 SO 4 -> ZnSO 4 + H 2
(c) K 2 Cr 2 O 7 + 6KI + 7H 2 SO 4 -> Cr 2 (SO 4 ) 3 + 3I 2 + 4K 2 SO 4 + 7H 2 O
(d) 2KMnO 4 + 10KC1 + 8H 2 SO 4 -» 2MnSO 4 + 5C1 2 + 6K 2 SO 4 + 8H 2 O
(e) KC1O 3 + 6KBr + 3H 2 SO 4 -» KC1 + 3Br 2 + 3K 2 SO 4 + 3H 2 O
(f) 2KMnO 4 + 5H 2 O 2 + 3H 2 SO 4 -^ 2MnSO 4 + 5O 2 + K 2 SO 4 + 8H 2 O
(g) MnO 2 + 2KC1 + 2H 2 SO 4 -» MnSO 4 + C1 2 + K 2 SO 4 + 2H 2 O
(h) 3Ag + 4HNO 3 -^ 3AgNO 3 + NO + 2H 2 O
(i) PbO 2 + SnSO 4 + 2H 2 SO 4 -^ PbSO 4 + Sn(SO 4 ) 2 + 2H 2 O
0) 2KMnO 4 + 5H 2 C 2 O 4 + 3H 2 SO 4 -> 2MnSO 4 + 10CO 2 + K 2 SO 4 + 8H 2 O
(k) H 2 O 2 + HNO 2 -> HNO 3 + H 2 O
(1) Fe + CuSO 4 -» FeSO 4 + Cu
(m) 2Fe 2 (SO 4 ) 3 + 2KI -^ 2FeSO 4 + I 2 + K 2 SO 4
(n) KC1O 4 + 4H 3 AsO 3 -^ KC1 + 4H 3 AsO 4
(o) H 2 S + KC1O -> S + KC1 + H 2 O
6 (a) CH 2 O + Ag 2 O + OH~ -^ 2Ag + HCO 2 - + H 2 O
(b) C 2 H 2 + 2MnO 4 - + 6H
+ -^ 2CO 2 + 2Mn
2+ + 4H 2 O
(c) 2C 2 H 3 OC1 + 3Cr 2 O
2 ~ + 24H
+ -> 4CO 2 + C1 2 + 6Cr
3+ + 15H 2 O
(d) 6Ag
+ + AsH 3 + 3H 2 O -^ 6Ag + H 3 AsO 3 + 6H
+
(e) 2OH- + CN- + 2Fe(CN)i~ -^ CNO~ + 2Fe(CN)| + H 2 O
(f) 3C 2 H 4 O + 2NO 3 - + 2H
+ -» 2NO + 3C 2 H 4 O 2 + H 2 O
7 (a) 4Zn + 10H+ + NO 3 - -^ 4Zn
2+ + NH 4 + + 3H 2 O
(b) 2S 2 0 3
2
- + I 2 -» S 4 O|- + 21(c) IO 3 - + 51- + 6H
+ -^ 3I 2 + 3H 2 O
(d) Cu + 2H 2 SO 4 -^ CuSO 4 + SO 2 + 2H 2 O
(e) Zn + 2Fe
3+ -^ 2Fe
2+ + Zn
2+
(f) 81- + 5H 2 SO 4 -^ 4I 2 + H 2 S + 4SO|- + 4H 2 O
(g) 3C1O- -^ 2C1- + C10 3
8 See page 456 for answers to this problem