a) muối gồm:$NaCl,AgCl,$$Al_2$$(SO_4)$$_3$,$Ba(NO_3)$$_2$,$CuCl_2$,$(NH_4)$$_2$$SO_4$,

$NaOH$,$Cu(OH)_2$

      acid gồm:$HCl,$$H_2$$SO_4$,$H_3$$PO_4$

      oxide gồm:$CO_2$,$SO_3$,$CaO$,$Al_2$$O_3$,$P_2$$O_5$,$Na_2O$

b)$NaCl$:sodium chloride

 $NaOH$:sodium hydroxide

  $CaO$:calcium oxide

  $Na_2O$:sodium oxide

  $CO_2$:carbon dioxide

  $SO_3$:sulfur trioxide

  $Al_2$$O_3$:aluminium oxide

   $HCl$:hydrochloric acid

   $P_2$$O_5$:diphosphorus pentaoxide

   $H_2$$SO_4$:sulfuric acid

   $(NH_4)$$_2$$SO_4$:diamonium sulfate

    $AgCl$:sliver chloride

    $CuCl_2$:Copper chloride

    $Cu(OH)_2$:Copper hydroxide

    $Ba(NO_3)$$_2$:barium nitrate

    $Al_2$$(SO_4)$$_3$:aluminium sulfate

     $H_3$$PO_4$:phosphoric acid