Answer
See answer below.
Work Step by Step
a) $K_2CO_3(aq)+2\ HClO_4(aq)\rightarrow 2\ KClO_4(aq)+H_2O(l)+CO_2(g)$
Gas-forming reaction.
Names from left to right:
Potassium carbonate, perchloric acid, potassium perchlorate, water, carbon dioxide.
Net ionic equation:
$CO_3^{2-}(aq)+2\ H_3O^+(aq)\rightarrow 3\ H_2O(l)+CO_2(g)$
b) $FeCl_2(aq)+(NH_4)_2S(aq)\rightarrow FeS(s)+2\ NH_4Cl(aq)$
Precipitation reaction.
Names from left to right:
Iron (||) chloride, ammonium sulfide, iron (||) sulfide, ammonium chloride.
Net ionic equation:
$Fe^{2+}(aq)+S^{2-}(aq)\rightarrow FeS(s)$
c) $Fe(NO_3)_2(aq)+Na_2CO_3(aq)\rightarrow FeCO_3(s)+2\ NaNO_3(aq)$
Precipitation reaction.
Names from left to right:
Iron (||) nitrate, sodium carbonate, iron (||) carbonate, sodium nitrate.
Net ionic equation:
$Fe^{2+}(aq)+CO_3^{2-}(aq)\rightarrow FeCO_3(s)$
d) $FeCl_3(aq)+3\ NaOH(aq)\rightarrow Fe(OH)_3(s)+3\ NaCl(aq)$
Precipitation reaction.
Names from left to right:
Iron (|||) chloride, sodium hydroxide, iron (|||) hydroxide, sodium chloride.
Net ionic equation:
$Fe^{3+}(aq)+3OH^{-}(aq)\rightarrow Fe(OH)_3(s)$
