Chemical Equations
Exercises
Exercises
Classify the following reactions as combination, decomposition, single displacement, double displacement, or combustion:
1. Mg (s) + Ni(NO3)2 (aq) ––�?gt; Ni (s) + Mg(NO3)2 (aq)
2. H2SO4 (aq) + 2 NaOH (aq) ––�?gt; Na2SO4 (aq) + 2 H2O (l)
3. 2 HgO (s) 2 Hg (l) + O2 (g)
4. 2 Fe (s) + 3 Cl2 (g) ––�?gt; 2 FeCl3 (s)
5. Fe (s) + 2 HCl (aq) ––�?gt; H2 (g) + FeCl2 (aq)
6. C5H12 (l) + 8 O2 (g) ––�?gt; 5 CO2 (g) + 6 H2O (g)
7. BaCl2 (aq) + Na2SO4 (aq) ––�?gt; 2 NaCl (aq) + BaSO4 (s)
8. P4O10 (s) + 6 H2O (l) ––�?gt; 4 H3PO4 (l)
9. N2O3 (g) ––�?gt; NO (g) + NO2 (g)
10. NaHCO3 (s) + HC2H3O2 (aq) ––�?gt; CO2 (g) + H2O (l) + NaC2H3O2 (aq) (two steps)
Balance the following reactions:
11. Fe2O3 (s) + H2 (g) ––�?gt; Fe (s) + H2O (l)
12. Al (s) + O2 (g) ––�?gt; Al2O3 (s)
13. Zn(NO3)2 (aq) + NaOH (aq) ––�?gt; NaNO3 (aq) + Zn(OH)2 (s)
14. CCl4 (g) + O2 (g) ––�?gt; COCl2 (g) + Cl2 (g)
15. N2O5 (g) + H2O (l) ––�?gt; HNO3 (aq)
16. PCl5 (l) + H2O (l) ––�?gt; H3PO4 (aq) + HCl (aq)
17. C6H14 (l) + O2 (g) ––�?gt; CO2 (g) + H2O (l)
18. NO2 (g) + H2O (l) ––�?gt; HNO3 (aq) + NO (g)
19. CH3CH2OH (l) + O2 (g) ––�?gt; CO2 (g) + H2O (g)
20. Cu (s) + HNO3 (aq) ––�?gt; Cu(NO3)2 (aq) + NO (g) + H2O (l)
Complete and balance the following reactions:
21. Al (s) + CuSO4 (aq) ––�?gt;
22. CdCl2 (aq) + Na2S (aq) ––�?gt;
23. SO3 (g) + H2O (l) ––�?gt;
24. H2O2 (aq) ––�?gt;
25. Pb(NO3)2 (aq) + NaCl (aq) ––�?gt;
26. C40H82 (s) + O2 (g) ––�?gt;
27. H2 (g) + O2 (g) ––�?gt;
28. Na (s) + H2O (l) ––�?gt;
29. Al(OH)3 (s) + H2SO4 (aq) ––�?gt;
30. Mg (s) + N2 (g)