a) tất cả
\(NaOH+HCl->NaCl+H_2O\)
\(Mg\left(OH\right)_2+2HCl->MgCl_2+2H_2O\)
\(Ba\left(OH\right)_2+H_2O->BaCl_2+H_22O\)
b) Mg(OH)2
\(Mg\left(OH\right)_2-^{t^o}>MgO+H_2O\)
c) NaOH , Ba(OH)2
\(2NaOH+CO_2->Na_2CO_3+H_2O\)
\(Ba\left(OH\right)_2+CO_2->BaCO_3+H_2O\)
d) NaOH,Ba(OH)2
làm quỳ tím hóa xanh