Taking into account the definition of net ionic equation, aprecipitate of Fe₂S₃is formed when aqueous solutions of Na₂S and FeCl₃ are mixed.Ionic equationThenet ionic equationis a chemical equation for a reaction that lists only the species that participate in the reaction.In other words, anionic equationis a chemical equation where electrolytes in aqueous solution are written as dissociated ions.Spectator ionA spectator ion is an ion thatappearsbothas a reactant andas aproductin an ionic equation.Spectator ions can be either cations (positively charged ions) or anions (negatively charged ions).When writing a net ionic equation, spectator ions found in the original equation are ignored. Thus, the total ionic reaction is different from the net chemical reaction.Na₂S and FeCl₃ mixedThebalanced equationwill be:2 FeCl₃ (aq) + 3 Na₂S (aq) → Fe₂S₃ (s) + 6 NaCl(aq)where (aq) means aqueous and (s) solid.Taking into account that:All Cl⁻, Br⁻ and I⁻ salts are soluble.All alkali metal salts are soluble. (eg Li, Na or K salts).The sulfides are very slightly soluble, except those of the alkali metals.Thetotal ionic equationin separated aqueous solution will be:2 Fe³⁺(aq) + 6 Cl⁻(aq) + 6 Na⁺(aq) + 3 S²⁻(aq) → Fe₂S₃(s) + 6 Na⁺(aq) + 6 Cl⁻(aq)In this case,Na⁺ and Cl⁻are thespectator ionsbecause they appear unchanged in both the product and the reagent. So these ions cancel out by writing thenet ionic equationand you get:2 Fe³⁺(aq) + 3 S²⁻(aq) → Fe₂S₃(s)Since Fe₂S₃ is an insoluble salt, it will precipitate.Finally, aprecipitate of Fe₂S₃is formed when aqueous solutions of Na₂S and FeCl₃ are mixed.Learn moreaboutnet ionic equation:brainly.com/question/7018960brainly.com/question/25604204brainly.com/question/22885959brainly.com/question/19510514?referrer=searchResults...

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