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Câu hỏi: Biến đổi hóa học nào sau đây là do $ Al{\left( {OH} \right)_3} $ có tính axit?
$ \eqalign{
& A.Al{\left(OH\right)_3}\left(r\right) \Rightarrow A{l^{3 + }}\left({\rm{dd}}\right) \cr
& B.Al{\left(OH\right)_3}\left(r\right) \Rightarrow A{l_2}{O_3}\left(r\right) \cr
& C.Al{\left(OH\right)_3}\left(r\right) \Rightarrow {\left[ {Al{{\left(OH\right)}_4}} \right]^ - }\left({\rm{dd}}\right) \cr
& D.Al{\left(OH\right)_3}\left(r\right) \Rightarrow A{l_2}{O_3}\left(r\right) \Rightarrow Al\left(r\right) \cr} $
$ \eqalign{
& A.Al{\left(OH\right)_3}\left(r\right) \Rightarrow A{l^{3 + }}\left({\rm{dd}}\right) \cr
& B.Al{\left(OH\right)_3}\left(r\right) \Rightarrow A{l_2}{O_3}\left(r\right) \cr
& C.Al{\left(OH\right)_3}\left(r\right) \Rightarrow {\left[ {Al{{\left(OH\right)}_4}} \right]^ - }\left({\rm{dd}}\right) \cr
& D.Al{\left(OH\right)_3}\left(r\right) \Rightarrow A{l_2}{O_3}\left(r\right) \Rightarrow Al\left(r\right) \cr} $
$ Al{\left(OH\right)_3} + O{H^ - } \Rightarrow {\left[ {Al{{\left(OH\right)}_4}} \right]^ - }. $
Chọn C.
Chọn C.