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Equations Worksheet #2
Balance the following equations. Classify each reaction.
2
2
1. __ __ KOH + _____ H2S  _____ K2S + __ __ H2O
Type of Reaction: DOUBLE DISPLACEMENT & ACID/BASE
2
2. __ __ HNO2  _____ N2O3 + _____ H2O
Type of Reaction: DECOMPOSITION
2
2
3. __ __ NaOH + _____ H2SO4  _____ Na2SO4 + __ ___ H2O
Type of Reaction: DOUBLE DISPLACEMENT & ACID/BASE
2
4. _____ (NH4)2S + _____ Pb(NO3)2  _____ PbS + __ __ NH4NO3
Type of Reaction: DOUBLE DISPLACEMENT & PPT
2
2
5. __ __ SO2 + _____ O2  __ __ SO3
Type of Reaction: SYNTHESIS & REDOX
2
6. __ __ C4H10 + __
13__ O2
8
 __ __ CO2 + __
10__ H2O
Type of Reaction: COMBUSTION
2
7. __ __ PbO2
2
 __ __ PbO + _____ O2
Type of Reaction: DECOMPOSITION & REDOX
2
3
6
8. __ __ Fe(OH)3 + __ __ H2SO4  _____ Fe2(SO4)3 + __ __ H2O
Type of Reaction: DOUBLE DISPLACEMENT & ACID/BASE
2
3
6
9. __ __ K3PO4 + __ __ BaCl2  __ __ KCl + ____ Ba3(PO4)2
Type of Reaction: DOUBLE DISPLACEMENT & PPT
5
3
4
10. _____ C3H8 + __ __ O2  __ __ CO2 + __ __ H2O
Type of Reaction: COMBUSTION
2
11. _____ N2O5 + _____ H2O  __ __ HNO3
Type of Reaction: SYNTHESIS
3
4
3
2
6
12. __ __ PbO2 + __ __ NH3  __ __ Pb + __ __ N2 + __ __ H2O
3
3
13. __ __ AgNO3 + _____ Na3PO4  _____ Ag3PO4 + __ __ NaNO3
Type of Reaction: DOUBLE DISPLACEMENT & PPT
2
2
14. __ __ LiCl + _____ Hg2(NO3)2  _____ Hg2Cl2 + __ __ LiNO3
Type of Reaction: DOUBLE DISPLACEMENT & PPT
3
2
6
15. __ __ CaCl2 + __ __ Na3PO4  _____ Ca3(PO4)2 + __ __ NaCl
Type of Reaction: DOUBLE DISPLACEMENT & PPT
Predict the state of each of the following substances. (½ point)
16. AgNO3
17. Na3PO4
18. Pb
22. HNO3 ( aq )
( aq )
23. PbO2
( aq )
24. N2
(s )
19. Hg2Cl2
20. N2O5
(g )
25. Ag3PO4
( s)
26. LiCl
( g)
21. H2O ( l
(s)
27. Ca
)
(s)
( aq )
(s)
Use the following word descriptions to write balanced chemical equations
showing the formulas of reactants and products. Make sure you include the
physical states of reactants and products.
28. Iron metal reacts with oxygen in the atmosphere to form rust, iron (III)
oxide.
4 Fe
+ 3 O2 (g)  2 Fe2O3 (s)
(s)
29. Magnesium metal reacts with hydrochloric acid to produce hydrogen and
magnesium chloride.
Mg
(s)
+ 2 HCl
(aq)
 H2 (g) + MgCl2 (aq)
30. Silver oxide decomposes upon heating to produce silver metal and oxygen
gas.
2 Ag2O
(s)
 4 Ag
(s)
+ O2 (g)