Question

Give the complete ionic equation for the reaction that occurs when aqueous solutions of sodium sulfide and iron(II) nitrate are mixed.

Answer 1

Answer:

2 Na⁺(aq) + S²⁻(aq) + Fe²⁺(aq) + 2 NO₃⁻(aq) ⇒ FeS(s) + 2 Na⁺(aq) + 2 NO₃⁻(aq)

Explanation:

Let's consider the molecular equation that occurs when aqueous solutions of sodium sulfide and iron(II) nitrate are mixed.

Na₂S(aq) + Fe(NO₃)₂ ⇒ FeS(s) + 2 NaNO₃(aq)

The complete ionic equation includes all the ions and the species that do not dissociate in water.

2 Na⁺(aq) + S²⁻(aq) + Fe²⁺(aq) + 2 NO₃⁻(aq) ⇒ FeS(s) + 2 Na⁺(aq) + 2 NO₃⁻(aq)

Answer 2

The complete ionic equation for the reaction between aqueous solution of sodium sulfide and iron(II) nitrate is

2Na⁺(aq) + S²⁻(aq) + Fe²⁺(aq) + 2NO₃⁻(aq) —> FeS(s) + 2Na⁺(aq) + 2NO₃⁻(aq)

The complete ionic equation for the reaction between aqueous solution of sodium sulfide and iron(II) nitrate can be written as follow:

In solution, Na₂S and Fe(NO₃)₂ will dissociate as follow:

Na₂S(aq) —> 2Na⁺(aq) + S²¯(aq)

Fe(NO₃)₂(aq) —> Fe²⁺(aq) + 2NO₃¯(aq)

The reaction will proceeds as illustrated below to give the complete ionic equation:

Na₂S(aq) + Fe(NO₃)₂(aq)—>

2Na⁺(aq) + S²¯(aq) + Fe²⁺(aq) + 2NO₃¯(aq) —> FeS(s) + 2Na⁺(aq) + 2NO₃¯(aq)

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