Balancing Equation Worksheet
Answer Key

1 2 H2 + O2 => 2 H2O
2 H3PO4 + 3 KOH => K3PO4 + 3 H2O
3 6 K + B2O3 => 3 K2O + 2 B
4 HCl + NaOH => NaCl + H2O
5 10 Na + 2 NaNO3 => 6 Na2O + N2
6 4 C + S8 => 4 CS2
7 2 Na + O2 => Na2O2
8 2 N2 + 5 O2 => 2 N2O5
9 2 H3PO4 + 3 Mg(OH)2 => Mg3(PO4)2 + 6 H2O
10 2 NaOH + H2CO3 => Na2CO3 + 2 H2O
11 KOH + HBr => KBr + H2O
12 H2 + O2 => H2O2
13 4 Na + O2 => 2 Na2O
14 2 Al(OH)3 + 3 H2CO3 => Al2(CO3)3 + 6 H2O
15 16 Al + 3 S8 => 8 Al2S3
16* 6 Cs + N2 => 2 Cs3N (here you need to change Cs3to Cs3N first!)
17 Mg + Cl2 => MgCl2
18 10 Rb + 2 RbNO3 => 6 Rb2O + N2
19 2 C6H6 + 15 O2 => 12 CO2 + 6 H2O
20 N2 + 3 H2 => 2 NH3
21 2 C10H22 + 31 O2 => 20 CO2 + 22 H2O
22 Al(OH)3 + 3 HBr => AlBr3 + 3 H2O
23 2 CH3CH2CH2CH3 + 13 O2 => 8 CO2 + 10 H2O
24 C + O2 => CO2
25 C3H8 + 5 O2 => 3 CO2 + 4 H2O
26 3 Li + AlCl3 => 3 LiCl + Al
27 2 C2H6 + 7 O2 => 4 CO2 + 6 H2O
28 3 NH4OH + H3PO4 => (NH4)3PO4 + 3 H2O
29 3 Rb + P => Rb3P
30 CH4 + 2 O2 => CO2 + 2 H2O
31 2 Al(OH)3 + 3 H2SO4 => Al2(SO4)3 + 6 H2O
32 2 Na + Cl2 => 2 NaCl
33 16 Rb + S8 => 8 Rb2S
34 2 H3PO4 + 3 Ca(OH)2 => Ca3(PO4)2 + 6 H2O
35 NH3 + HCl => NH4Cl
36 2 Li + 2 H2O => 2 LiOH + H2
37 Ca3(PO4)2 + 3 SiO2 + 5 C => 3 CaSiO3 + 5 CO + 2 P
38 4 NH3 + 3 O2 => 2 N2 + 6 H2O
39 4 FeS2 + 11 O2 => 2 Fe2O3 + 8 SO2
40 5 C + 2 SO2 =>  CS2 + 4 CO