`1)`

`a)`

`HBr:` hydrobromic acid

`H_2SO_3:` sulfurous acid

`H_3PO_4:` phosphoric acid

`H_2SO_4:` sulfuric acid

`b)`

`Mg(OH)_2:` magnesium hydroxide

`Fe(OH)_3:` ferric hydroxide

`Cu(OH)_2:` cupric hydroxide

`c)`

`Ba(NO_3)_2:` barium nitrate

`Al_2(SO_4)_3:` aluminium sulfate

`Na_2SO_3:` sodium sulfite

`ZnS:` zinc sulfide

`Na_2HPO_4:` sodium hydrogen phosphate

`NaH_2PO_4:` sodium dihydrogen phosphate

`2)`

Oxide:

`BaO:` barium oxide

`SO_2:` sulfur dioxide

`SO_3:` sulfur trioxide

Base:

`Mg(OH)_2:` magnesium hydroxide

`Al(OH)_3:` aluminium hydroxide

Acid:

`H_2CO_3:` carbonic acid

`H_2S:` hydrosulfuric acid

`H_2SO_4:` sulfuric acid

Muối:

`FeCl_3:` ferric chloride

`NH_4NO_3:` ammonium nitrate

`CaCO_3:` calcium carbonate

`ZnSO_4:` zinc sulfate

`Ca(H_2PO_4)_2:` calcium dihydrogen phosphate

`KCl:` potassium chloride

`Na_2SO_3:` sodium sulfite

`KNO_3:` potassium nitrate

`MgSO_4:` magnesium sulfate

`(NH_4)_2SO_4:` ammonium sulfate

`NaHCO_3:` sodium hydrogen carbonate

`K_3PO_4:` potassium phosphate

`3)`

Muối tan trong nước: `K_2SO_4,Na_2CO_3,AgNO_3,KCl,CaCl_2,MgSO_4`