1. Balancing Chemical Equations

2. Ca + HCl a CaCl2 + H2 Ca + 2 HCl a CaCl2 + H2 Single Replacement +2 -1
1. calcium + hydrochloric acid (HCl) a calcium chloride and hydrogen (gas)
Ca + HCl a CaCl H2
Formula equation
Balanced chemical equation
Ca HCl a CaCl H2
Single Replacement

3. MgF2 + Pb(NO3)2 a Mg(NO3)2 + PbF2+2 -1 +2 -1
2. magnesium fluoride lead(II) nitrate a magnesium nitrate lead(II)fluoride +2 -1 +2 -1
MgF Pb(NO3)2 a
MgNO PbF
Mg(NO3) PbF2
MgF Pb(NO3)2 a Mg(NO3) PbF2
Double Replacement

4. 3. aluminum oxide + water a aluminum hydroxide+3 -2
Al O H2O a

5. 3. aluminum oxide + water a aluminum hydroxide+3 -1
Al2O H2O a
Al OH
Formula equation
Al2O H2O a Al(OH)3
Balanced chemical equation
Al2O H2O a 2Al(OH)3
Synthesis

6. 4. Ba(OH)2 + HBr a BaBr2 + HOH 4. Ba(OH)2 + 2 HBr a BaBr2 + 2 HOH
Formula equation
4. Ba(OH) HBr a BaBr HOH
Balanced chemical equation
Double Replacement

7. 5. chlorine + magnesium iodide a magnesium chloride + iodine
Cl MgI a
MgCl2
+ I2
Single Replacement

8. 6. nickel(III)phosphate + potassium sulfate a nickel(III)sulfate + potassium phosphate
Ni+3PO K+1SO a

9. NiPO4 + K2SO4 a Ni+3SO4-2 + K+1PO4-3 NiPO4 + K2SO4 a Ni2(SO4)3 + K3PO4
6. nickel(III)phosphate + potassium sulfate a nickel(III)sulfate + potassium phosphate
NiPO K2SO a
Ni+3SO K+1PO4-3
NiPO K2SO a Ni2(SO4) K3PO4
Formula equation
2 NiPO K2SO a Ni2(SO4) K3PO4
Balanced chemical equation
Double Replacement

10. 7. sodium + zinc oxide a sodium oxide + zinc+2 -2
7. sodium zinc oxide a sodium oxide zinc +1 -2
Na ZnO a
Na O Zn
Na ZnO a Na2O Zn
Formula equation
2 Na ZnO a Na2O Zn
Balanced chemical equation
Single Replacement

11. 8. strontium sulfite a sulfur dioxide + strontium oxide
Sr+2SO a SO Sr+2O-2
SrSO a SO SrO
Balanced chemical equation
Decomposition

12. 9. potassium hydroxide a potassium oxide + water+1 -1 +1 -2
9. potassium hydroxide a potassium oxide water
KOH a K2O + H2O
Formula equation
2 KOH a K2O + H2O
Balanced chemical equation
Decomposition

13. 10. ammonia + oxygen a nitrogen dioxide + water
NH O2 a NO H2O
4 NH O2 a 4 NO H2O

14. 11. Al + O2 a aluminum oxide Al + O2 a Al2O3 4 Al + 3 O2 a 2 Al2O3+3 -2
11. Al O2 a aluminum oxide
Al O a Al2O3
Formula equation
4 Al O a 2 Al2O3
Balanced chemical equation
Synthesis

15. of hydroxides produce water
12. Fe(OH)2 a
Decomposition
of hydroxides produce water
Fe(OH)2 a FeO + H2O
Balanced chemical equation
Decomposition

16. 13. Ba + Ni(OH)3 a Ba+2OH-1 + Ni Ba + Ni(OH)3 a Ba(OH)2 + Ni
Formula equation
3 Ba Ni(OH)3 a 3 Ba(OH) Ni
Balanced chemical equation
Single Replacement

17. of carbonates produce CO2
14. sodium carbonate a
Decomposition
of carbonates produce CO2
Na2CO3 a Na2O + CO2
Balanced chemical equation
Decomposition

18. 15. KOH + H2SO4 a K+1SO4-2 + H+1OH-1 KOH + H2SO4 a K2SO4 + HOH
Double replacement
15. KOH H2SO4 a
K+1SO H+1OH-1
KOH H2SO4 a K2SO HOH
Formula equation
2 KOH H2SO4 a K2SO HOH
Balanced chemical equation
Double Replacement

19. 16. nitrogen + hydrogen a NH3 (ammonia)
Remember Br I N Cl H O F
N H2 a NH3
N H2 a 2 NH3
Balanced chemical equation
Synthesis

20. Ca(ClO3)2 + Na3PO4 a Ca3(PO4)2 + NaClO3
Formula equation
3 Ca(ClO3) Na3PO4 a Ca3(PO4) NaClO3
Balanced chemical equation
Double Replacement

21. 18. hydrogen gas + copper(II) oxide a
H Cu+2O-2 a ?
H CuO a H+1O Cu
H CuO a H2O + Cu
Balanced chemical equation
Single Replacement

22. of chlorates produce chlorides and oxygen
19. NaClO3 a
Decomposition
of chlorates produce chlorides and oxygen
2NaClO3 a 2NaCl + O2
Balanced chemical equation
Decomposition

23. 20. KI + Cl2 a K+1Cl-1 + I2 KI + Cl2 a KCl + I2
chlorine replaces I
KI Cl2 a
K+1Cl I2
KI Cl2 a KCl I2
Formula equation
2 KI Cl2 a 2 KCl I2
Balanced chemical equation
Single Replacement

24. 21. H2 + S a hydrogen sulfide H2 + S a H2S H2 + S a H2S Synthesis +1-2
21. H S a
hydrogen sulfide
H S a H2S
Formula equation
H S a H2S
Balanced chemical equation
Synthesis

25. 22. NH4OH a ? NH4OH a ? + H2O NH3 Decomposition ….
of hydroxides produces water.
NH4OH a ? H2O
NH3
Balanced chemical equation
Decomposition

26. 0 – 4 A
5 – 8 B
9 – 12 C
13 – 16 D