Lab# 21:  Balancing Chemical Equations

1. 
2 H2 + O2 → 2 H2O
synthesis
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11. 
4 Li + O2 → 2 LiO2
synthesis
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2. 
BaCl2 + Na2SO4 → BaSO4 + 2 NaCl
double replacement
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12. 
2 AgNO3 + Cu → Cu(NO3)2 + 2 Ag
single replacement
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3. 
Si + 2 Cl2 → SiCl4
synthesis
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13. 
C3H8 + 5 O2 → 3 CO2 + 4 H2O
combustion
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4. 
Cl2 + 2 KBr → 2 KCl + Br2
single replacement
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14. 
CaCO3 → CaO + CO2
decomposition
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5. 
2 Na + Cl2 → 2 NaCl
synthesis
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15. 
NaOH + HCl → NaCl + H2O
double replacement (neutralization)
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6. 
N2 + 3 H2 → 2 NH3
synthesis
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16. 
2 HgO → 2 Hg + O2
decomposition
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7. 
2 NaHCO3 → Na2CO3 + CO2 + H2O
decomposition
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17. 
3 H2O + 2 Fe → Fe2O3 + 3 H2
single replacement
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8. 
4 Al + 3 O2 → 2 Al2O3
synthesis
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18. 
2 Al + 6 HCl → 2 AlCl3 + 3 H2
single replacement
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9. 
CH4 + 2 O2 → CO2 + 2 H2O
combustion
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19. 
2 K + 2 H2O → 2 KOH + H2
single replacement
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10. 
2 HCl + Zn → NaCl2 + H2
single replacement
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20. 
4 NH3 + 5 O2 → 4 NO + 6 H2O
combustion
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Last updated 13 March 2020