A decomposition reaction

2H2O2 (l) ? O2 (g) + 2H2O
HC2H3O2 + OH- ? C2H3O2 - + H2O
N2 (g) + 3 H2 (g) ? 2 NH3 (g)
HCl + NaOH ? H2O + NaCl
Al(OH)3 + 3 H+ ? Al 3+ + 3 H2O