Oxidation-Reduction Equations
Complete and balance the following equations:
1 Na (s) + H2O (l) ? NaOH (aq) + H2 (g)
2 Fe (s) + O2 (g) ? Fe2O3 (s)
3 C3H8 (g) + O2 (g) ? CO2 (g) + H2O (l)
4 P (s) + Cl2 (g) ? PCl5 (g)
5 NaBr (aq) + Cl2 (g) ? NaCl (aq) + Br2 (g)
6 Zn (s) + HCl (aq) ? ZnCl2 (aq) + H2 (g)
7 S8 (g) + O2 (g) ? SO2 (g)
8 AgCl (aq) + Cu (s) ? Ag (s) + CuCl2 (aq)
9 Ag2S (aq) + Al (s) + H2O (l) ? Ag (s) + Al(OH)3 (aq) + H2S (g)
10 C (s) + O2 (g) ? CO (g)
Solution
1) 2 Na + 2 H2O = 2 NaOH + H2
2) 4Fe + 3 O2 = 2 Fe2O3
3) C3H8 (g) + 5 O2 (g) ? 3CO2 (g) + 4 H2O
4) P2 (s) +5 Cl2 (g) ?2 PCl5 (g)
5) 2 NaBr (aq) + Cl2 (g) ?2 NaCl (aq) + Br2 (g)
6 ) Zn (s) + 2HCl (aq) ? ZnCl2 (aq) + H2 (g)
7) S8 (g) +8O2 (g) ? 8SO2 (g)
8) 2 AgCl (aq) + Cu (s) ? 2Ag (s) + CuCl2 (aq)
9) 3Ag2S (aq) + 2Al (s) +6 H2O (l) ? 6Ag (s) + 2Al(OH)3 (aq) + 3H2S (g)
10) 2C (s) + O2 (g) ? 2CO (g)
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