Question

Write the net ionic equation (including phases) that corresponds to Fe(NO3)2(aq)+K2S(aq) right arrow FeS(s)+2KNO3(aq)

Answer 1

Whenever a precipitate in the solid form appears only that species will be present in net ionic equation, remaining all aqueous phase ions are called as spectator ions an won't appear in net ionic equation.

In the given reaction only FeS is in solid form, hence the NIE (net ionic equation) will be

Fe²⁺(aq) + S^2-(aq) --> FeS(s)                    ---------------------------- This is your answer my friend

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