Cân bằng PTHH:
1. $2Fe+3Cl_2\buildrel{{t^o}}\over\to 2FeCl_3$
2. $2Na+Cl_2\buildrel{{t^o}}\over\to 2NaCl$
3. $2Al(OH)_3\buildrel{{t^o}}\over\to Al_2O_3+3H_2O$
4. $2Fe(OH)_3\buildrel{{t^o}}\over\to Fe_2O_3+3H_2O$
5. $4P+5O_2\buildrel{{t^o}}\over\to 2P_2O_5$
6. $2Al+3Cl_2\buildrel{{t^o}}\over\to 2AlCl_3$