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Balancing Chemical Equations – Answer Key
Balance the equations below:
1) 1 N
2
+ 3 H
2
Æ 2 NH
3
2) 2 KClO
3
Æ 2 KCl + 3 O
2
3) 2 NaCl + 1 F
2
Æ 2 NaF + 1 Cl
2
4) 2 H
2
+ 1 O
2
Æ 2 H
2
O
5) 1 Pb(OH)
2
+ 2 HCl Æ 2 H
2
O + 1 PbCl
2
6) 2 AlBr
3
+ 3 K
2
SO
4
Æ 6 KBr + 1 Al
2
(SO
4
)
3
7) 1 CH
4
+ 2 O
2
Æ 1 CO
2
+ 2 H
2
O
8) 1 C
3
H
8
+ 5 O
2
Æ 3 CO
2
+ 4 H
2
O
9) 2 C
8
H
18
+ 25 O
2
Æ 16 CO
2
+ 18 H
2
O
10) 1 FeCl
3
+ 3 NaOH Æ 1 Fe(OH)
3
+ 3 NaCl
11) 4 P + 5 O
2
Æ 2 P
2
O
5
12) 2 Na + 2 H
2
O Æ 2 NaOH + 1 H
2
13) 2 Ag
2
O Æ 4 Ag + 1 O
2
14) 1 S
8
+ 12 O
2
Æ 8 SO
3
15) 6 CO
2
+ 6 H
2
O Æ 1 C
6
H
12
O
6
+ 6 O
2
16) 1 K + 1 MgBr Æ 1 KBr + 1 Mg
17) 2 HCl + 1 CaCO
3
Æ 1 CaCl
2
+ 1 H
2
O + 1 CO
2
18) 1 HNO
3
+ 1 NaHCO
3
Æ 1 NaNO
3
+ 1 H
2
O + 1 CO
2
19) 2 H
2
O + 1 O
2
Æ 2 H
2
O
2
20) 2 NaBr + 1 CaF
2
Æ 2 NaF + 1 CaBr
2
21) 1 H
2
SO
4
+ 2 NaNO
2
Æ 2 HNO
2
+ 1 Na
2
SO
4
