Đáp án:

Giải thích các bước giải:

 `Fe(OH)_2 : ` Iron `(II)` hydroxide

`NaOH : ` Sodium hydroxide

`KOH : ` Potassium hydroxide

`Fe(OH)_3 : ` Iron `(III)` hydroxide

`Ba(OH)_2 : ` Barium hydroxide

Ví dụ phản ứng base + acid :

`Ba(OH)_2 + H_2SO_4 -> BaSO_4 + 2H_2O`

`NaOH + HCl -> NaCl +  H_2O`

`Al(OH)_3 +3 H_2SO_4 -> Al_2(SO_4)_3 + 3H_2O`

$Ca(OH)_2 :$ calcium hydroxide 

`Ba(OH)_2` barium hydroxide 

`NaOH` sodium hydroxide 

`Fe(OH)_2` iron (II) hydroxide 

`Fe(OH)_3` iron (III) hdroxide 

3 vd 

$NaOH +HCl \xrightarrow{} NaCl +H_2O$ 

$KOH +HCl \xrightarrow{} KCl +H_2O$ 

$Fe(OH)_2 +2HCl \xrightarrow{} FeCl_2 +2H_2O$