Balancing Equations: Practice Problems 1. Balance each of the following equations.
(a) Fe+ Cl2 −−→ FeCl3
(b) Fe+ O2 −−→ Fe2O3
(c) FeBr3 + H2SO4 −−→ Fe2(SO4)3 + HBr (d) C4H6O3 + H2O −−→ C2H4O2
(e) C2H4 + O2 −−→ CO2 + H2O
(f) C4H10O+ O2 −−→ CO2 + H2O
(g) C7H16 + O2 −−→ CO2 + H2O
(h) H2SiCl2 + H2O −−→ H8Si4O4 + HCl (i) HSiCl3 + H2O −−→ H10Si10O15 + HCl (j) C7H9 + HNO3 −−→ C7H6(NO2)3 + H2O (k) C5H8O2 + NaH+ HCl −−→ C5H12O2 + NaCl
Balancing Equations: Answers to Practice Problems 1. Balanced equations. (Coefficients equal to one (1) do not need to be shown in your answers).
(a) 2 Fe+3 Cl2 −−→ 2 FeCl3
(b) 4 Fe+3 O2 −−→ 2 Fe2O3
(c) 2 FeBr3 +3 H2SO4 −−→ 1 Fe2(SO4)3 +6 HBr
(d) 1 C4H6O3 +1 H2O −−→ 2 C2H4O2
(e) 1 C2H4 +3 O2 −−→ 2 CO2 +2 H2O
(f) 1 C4H10O+6 O2 −−→ 4 CO2 +5 H2O
(g) 1 C7H16 +11 O2 −−→ 7 CO2 +8 H2O
(h) 4 H2SiCl2 +4 H2O −−→ 1 H8Si4O4 +8 HCl
(i) 10 HSiCl3 +15 H2O −−→ 1 H10Si10O15 +30 HCl
(j) 1 C7H9 +3 HNO3 −−→ 1 C7H6(NO2)3 +3 H2O
(k) 1 C5H8O2 +2 NaH+2 HCl −−→ 1 C5H12O2 +2 NaCl
Name: Date: Balancing Equations
Balance the following chemical equations.
1. Fe + H2S04 Fe2(SO4)3 + H2 2. C2H6 + O2 H2O + CO2 3. KOH + H3PO4 K3PO4 + H2O 4. SnO2 + H2 Sn + H2O 5. NH3 + O2 NO + H2O 6. KNO3 + H2CO3 K2CO3 + HNO3 7. B2Br6 + HNO3 B(NO3)3 + HBr 8. BF3 + Li2SO3 B2(SO3)3 + LiF
9. (NH4)3PO4 + Pb(NO3)4 Pb3(PO4)4 + NH4NO3 10. SeCl6 + O2 SeO2 + Cl2
Name: Date: Balancing Equations
Balance the following chemical equations.
1. CH4 + O2 CO2 + H2O 2. Na+ + Cl- NaCl
3. Al + O2 Al2O3
4. N2+ + H2 NH3
5. CO(g) + H2(g) C8H18(l) + H2O 6. FeO3(s) + CO(g) Fe(l) + CO2(g) 7. H2SO4 + Pb(OH)4 Pb(SO4)2 + H2O 8. Al + HCl AlCl3 + H2 9. Ca3(PO4)2 + H2SO4 CaSO4 + Ca(H2PO4)2 10. H3PO4 + HCl PCl5 + H2O
Name: Date: Balancing Equations
Balance the following chemical equations.
1. SiCl4(l) + H2O(l) SiO2(s) + HCl(aq) 2. As + NaOH Na3AsO3 + H2 3. Au2S3 + H2 Au + H2S 4. V2O5 + HCl VOCl3 + H2O 5. Hg(OH)2 + H3PO4 Hg3(PO4)2 + H2O 6. SiO2 + HF SiF4 + H2O 7. Zn + HCl ZnCl2 + H2 8. HClO4 + P4O10 H3PO4 + Cl2O7 9. N2(g) + O2(g) + H2O HNO3(aq) 10. NH4NO3 N2 + O2 + H2O
Name: Date: Balancing Equations
Balance the following chemical equations.
1. AgI + Na2S Ag2S + NaI 2. Na3PO4 + HCl NaCl + H3PO4 3. Ba3N2 + H2O Ba(OH)2 + NH3 4. TiCl4 + H2O TiO2 + HCl 5. CaCl2 + Na3PO4 Ca3(PO4)2 + NaCl
6. NaBr + Cl2 NaCl + Br2 7. Mg(OH)2 + HCl MgCl2 + H2O 8. FeS + O2 Fe2O3 + SO2 9. PCl5 + H2O H3PO4 + HCl 10. C2H6O + O2 CO2 + H2O
Name: Date: Balancing Equations
Balance the following chemical equations.
1. 2 Fe + 3 H2S04 1 Fe2(SO4)3 + 3 H2 2. 2 C2H6 + 7 O2 6 H2O + 4 CO2 3. 3 KOH + 1 H3PO4 1 K3PO4 + 3 H2O 4. 1 SnO2 + 2 H2 1 Sn + 2 H2O 5. 4 NH3 + 5 O2 4 NO + 6 H2O 6. 2 KNO3 + 1 H2CO3 1 K2CO3 + 2 HNO3 7. 1 B2Br6 + 6 HNO3 2 B(NO3)3 + 6 HBr 8. 2 BF3 + 3 Li2SO3 1 B2(SO3)3 + 6 LiF
9. 4 (NH4)3PO4 + 3 Pb(NO3)4 1 Pb3(PO4)4 + 12 NH4NO3 10. 1 SeCl6 + 1 O2 1 SeO2 + 3 Cl2
Name: Date: Balancing Equations
Balance the following chemical equations.
1. 1 CH4 + 2 O2 1 CO2 + 2 H2O 2. 2 Na+ + 2 Cl- 1 NaCl
3. 4 Al + 3 O2 2 Al2O3
4. 1 N2+ + 3 H2 2 NH3
5. 8 CO(g) + 17 H2(g) 1 C8H18(l) + 8 H2O 6. 1 FeO3(s) + 3 CO(g) 1 Fe(l) + 3 CO2(g) 7. 2 H2SO4 + 1 Pb(OH)4 1 Pb(SO4)2 + 4 H2O 8. 2 Al + 6 HCl 2 AlCl3 + 3 H2 9. 1 Ca3(PO4)2 + 2 H2SO4 2 CaSO4 + 1 Ca(H2PO4)2 10. 1 H3PO4 + 5 HCl 1 PCl5 + 4 H2O
Name: Date: Balancing Equations
Balance the following chemical equations.
1. 1 SiCl4(l) + 2 H2O(l) 1 SiO2(s) + 4 HCl(aq) 2. 2 As + 6 NaOH 2 Na3AsO3 + 3 H2 3. 1 Au2S3 + 3 H2 2 Au + 3 H2S 4. 1 V2O5 + 6 HCl 2 VOCl3 + 3 H2O 5. 3 Hg(OH)2 + 2 H3PO4 1 Hg3(PO4)2 + 6 H2O 6. 1 SiO2 + 4 HF 1 SiF4 + 2 H2O 7. 1 Zn + 2 HCl 1 ZnCl2 + 1 H2 8. 12 HClO4 + 1 P4O10 4 H3PO4 + 6 Cl2O7 9. 2 N2(g) + 5 O2(g) + 2 H2O 4 HNO3(aq) 10. 2 NH4NO3 2 N2 + 1 O2 + 4 H2O
Name: Date: Balancing Equations
Balance the following chemical equations.
1. 2 AgI + 1 Na2S 1 Ag2S + 2 NaI 2. 1 Na3PO4 + 3 HCl 3 NaCl + 1 H3PO4 3. 1 Ba3N2 + 6 H2O 3 Ba(OH)2 + 2 NH3 4. 1 TiCl4 + 2 H2O 1 TiO2 + 4 HCl 5. 3 CaCl2 + 2 Na3PO4 1 Ca3(PO4)2 + 6 NaCl
6. 2 NaBr + 1 Cl2 2 NaCl + 1 Br2 7. 1 Mg(OH)2 + 2 HCl 1 MgCl2 + 2 H2O 8. 4 FeS + 7 O2 2 Fe2O3 + 4 SO2 9. 1 PCl5 + 4 H2O 1 H3PO4 + 5 HCl 10. 1 C2H6O + 3 O2 2 CO2 + 3 H2O
Answers
Answer:
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I) Balance each of the following equations.
(a) 2 Fe+3 Cl₂ ⇒ 2 FeCl₃
(b) 4 Fe+3 O₂ ⇒ 2 Fe₂O₃
(c) 2 FeBr₃ +3 H₂SO₄ ⇒ 1 Fe₂(SO4)₃ +6 HBr
(d) 1 C₄H₆O₃ +1 H₂O ⇒ 2 C₂H₄O₂
(e) 1 C₂H₄ +3 O₂ ⇒2 CO₂ +2 H₂O
(f) 1 C₄H₁₀O+6 O₂ ⇒ 4 CO₂ +5 H₂O
(g) 1 C₇H₁₆ +11 O₂ ⇒ 7 CO₂ +8 H₂O
(h) 4 H₂SiCl₂ +4 H₂O ⇒ 1 H₈Si₄O₄ +8 HCl
(i) 10 HSiCl₃ +15 H₂O ⇒ 1 H₁₀Si₁₀O₁₅ +30 HCl
(j) 1 C₇H₉ +3 HNO₃ ⇒ 1 C₇H₆(NO₂)₃ +3 H₂O
(k) 1 C₅H₈O₂ +2 NaH+2 HCl ⇒ 1 C₅H₁₂O₂ +2 NaCl
II) Balance the following chemical equations.
1. 2 Fe + 3 H₂SO₄ ⇒ Fe₂(SO₄)₃ + 3 H₂
2. 2 C₂H₆ + 7 O₂ ⇒ 6 H₂O + 4 CO₂
3. 3 KOH + 1 H₃PO₄ ⇒ 1 K₃PO₄ + 3 H₂O
4. 1 SnO₂ + 2 H₂ ⇒ 1 Sn + 2 H₂O
5. 4 NH₃ + 5 O₂ ⇒ 4 NO + 6 H₂O
6. 2 KNO₃ + 1 H₂CO₃ ⇒ 1 K₂CO₃ + 2 HNO₃
7. 1 B₂Br₆ + 6 HNO₃ ⇒ 2 B(NO₃)₃ + 6 HBr
8. 2 BF₃ + 3 Li₂SO₃ ⇒ 1 B₂(SO₃)₃ + 6 LiF
9. 4 (NH₄)₃PO₄ + 3 Pb(NO₃)₄ ⇒ 1 Pb₃(PO₄)₄ + 12 NH₄NO₃
10. 1 SeCl₆ + 1 O₂ ⇒ 1 SeO₂ + 3 Cl₂
III) Balance the following chemical equations.
1. 1 CH₄ + 2 O₂ ⇒ 1 CO₂ + 2 H₂O
2. 2 Na+ 2 Cl ⇒ 1 NaCl
3. 4 Al + 3 O₂ ⇒ 2 Al₂O₃
4. 1 N₂ + 3 H₂ ⇒ 2 NH₃
5. 8 CO(g) + 17 H₂(g) ⇒ 1 C₈H₁₈(l) + 8 H₂O
6. 1 FeO₃(s) + 3 CO(g) ⇒ 1 Fe(l) + 3 CO₂(g)
7. 2 H₂SO₄ + 1 Pb(OH)₄ ⇒ 1 Pb(SO₄)₂ + 4 H₂O
8. 2 Al + 6 HCl ⇒ 2 AlCl₃ + 3 H₂
9. 1 Ca₃(PO₄)₂ + 2 H₂SO₄ ⇒ 2 CaSO₄ + 1 Ca(H₂PO₄)₂
10. 1 H₃PO₄ + 5 HCl ⇒ 1 PCl₅ + 4 H₂O
IV) Balance the following chemical equations.
1. 1 SiCl₄(l) + 2 H₂O(l) ⇒ 1 SiO₂(s) + 4 HCl(aq)
2. 2 As + 6 NaOH ⇒ 2 Na₃AsO₃ + 3 H₂
3. 1 Au₂S₃ + 3 H₂ ⇒ 2 Au + 3 H₂S
4. 1 V₂O₅ + 6 HCl ⇒ 2 VOCl₃ + 3 H₂O
5. 3 Hg(OH)₂ + 2 H₃PO₄ ⇒ 1 Hg₃(PO₄)₂ + 6 H₂O
6. 1 SiO₂ + 4 HF ⇒ 1 SiF₄+ 2 H₂O
7. 1 Zn + 2 HCl ⇒ 1 ZnCl₂ + 1 H₂
8. 12 HClO₄ + 1 P₄O₁₀ ⇒ 4 H₃PO₄ + 6 Cl₂O₇
9. 2 N₂(g) + 5 O₂(g) + 2 H₂O ⇒ 4 HNO₃(aq)
10. 2 NH₄NO3 ⇒ 2 N₂ + O₂ + 4 H₂O
V) Balance the following chemical equations.
1. 2 AgI + 1 Na₂S ⇒ 1Ag₂S + 2 NaI
2. 1 Na₃PO₄ + 3 HCl ⇒ 3 NaCl + 1 H₃PO₄
3. 1 Ba₃N₂ + 6 H₂O 3 Ba(OH)₂ + 2 NH₃
4. 1 TiCl₄ + 2 H₂O ⇒ 1 TiO₂ + 4 HCl
5. 3 CaCl₂ + 2 Na₃PO₄ ⇒ 1 Ca₃(PO₄)₂ + 6 NaCl
6. 2 NaBr + 1 Cl₂ ⇒ 2 NaCl + 1 Br2
7. 1 Mg(OH)₂ + 2 HCl ⇒ 1 MgCl₂ + 2 H₂O
8. 4 FeS + 7 O₂ ⇒ 2 Fe₂O₃ + 4 SO₂
9. 1 PCl₅ + 4 H₂O ⇒ 1 H₃PO₄ + 5 HCl
10. 1 C₂H₆O + 3 O₂ ⇒ 2 CO₂ + 3 H₂O
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