When Fe³⁺ reacts with Na₂S, what precipitation is formed? Give the correct chemical formula and name for the precipitation.

When iron(III) ions (Fe³⁺) react with sodium sulfide (Na₂S), a precipitation reaction occurs, resulting in the formation of iron(III) sulfide.

The correct chemical formula for the precipitate is Fe₂S₃. This compound is known as iron(III) sulfide. During the reaction, two iron(III) ions will combine with three sulfide ions (S²⁻) to form the solid precipitate of iron(III) sulfide, which is typically a dark-colored substance.

The balanced chemical equation for this reaction can be expressed as:

2 Fe³⁺ + 3 S²⁻ → Fe₂S₃ (s)

Thus, the final precipitate formed in this reaction is iron(III) sulfide, represented by the formula Fe₂S₃.

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