\(Al\left(OH\right)_3+3HCl\rightarrow AlCl_3+3H_2O\)
\(Al^{3+}+3OH^-+3H^++3Cl^-\rightarrow Al^{3+}+3Cl^-+3H_2O\)
=>\(3OH^-+3H^+\rightarrow3H_2O\)
\(Al\left(OH\right)_3+NaOH\rightarrow NaAlO_2+H_2O\)
=>\(Al\left(OH\right)_3+NA^++OH^-\rightarrow Na^++AlO_2^-+H_2O\)
=>\(Al\left(OH\right)_3+OH^-\rightarrow AlO_2^-+H_2O\)
\(Al_2O_3+6HCl\rightarrow2AlCl_3+3H_2O\)
=>\(Al_2O_3+6H^++6Cl^-\rightarrow2Al^{3+}+6Cl^-+3H_2O\)
=>\(Al_2O_3+6H^+\rightarrow2Al^{3+}+3H_2O\)
\(Al_2O_3+2NaOH\rightarrow2NaAlO_2+H_2O\)
=>\(Al_2O_3+2Na^++2OH^-\rightarrow2Na^++2AlO_2^-+H_2O\)
=>\(Al_2O_3+2OH^-\rightarrow2AlO_2^-+H_2O\)