a) tất cả
Al(OH)3 + 3HCl -> AlCl3 + 3H2O
Ba(OH)2 + 2HCl -> BaCl2 + 2H2O
b) Al(OH)3
\(2Al\left(OH\right)_3-^{t^O}>Al_2O_3+3H_2O\)
c ) Ba(OH)2
\(Ba\left(OH\right)_2+CO_2->BaCO_3+H_2O\) hoặc \(Ba\left(OH\right)_2+2CO_2->Ba\left(HCO_3\right)_2\)
d) Ba(OH)2