Question

Complete the following reaction in aqueous solution and select the spectator ions, Fe(NO₃)₂ + (NH₄)₂CO₃ ->

A)Fe²⁺(aq), NO₃⁻(aq)
B)NH₄⁺(aq), NO₃⁻(aq)
C)NH₄⁺(aq), CO₃²⁻(aq)
D)Fe²⁺(aq), NH₄⁺(aq), NO₃⁻(aq), CO₃²⁻(aq)
E)Fe²⁺(aq), CO₃²⁻(aq)

Answer 1

In the reaction between Fe(NO3)2 and (NH4)2CO3, the spectator ions are NH4+(aq) and NO3-(aq). Iron (II) carbonate precipitates out of the solution, and ammonium nitrate remains dissolved, resulting in these spectator ions remaining in the solution.

Step-by-step explanation:

To complete the reaction between Fe(NO3)2 and (NH4)2CO3 in aqueous solution, we need to consider the potential products formed and the solubility rules. When these two reactants are mixed, iron (II) carbonate and ammonium nitrate can form:

• Fe(NO3)2(aq) + (NH4)2CO3(aq) → FeCO3(s) + 2NH4NO3(aq)

Iron (II) carbonate is insoluble and precipitates out of the solution as a solid, while ammonium nitrate remains in the aqueous phase. The complete ionic equation is:

• Fe2+(aq) + 2NO3−(aq) + 2NH4+(aq) + CO32−(aq) → FeCO3(s) + 2NH4+(aq) + 2NO3−(aq)

By eliminating the spectator ions, which are ions that do not participate in the formation of the precipitate, we can write the net ionic equation. The spectator ions are NH4+(aq) and NO3−(aq) since they are present on both sides of the equation and do not change during the reaction. Therefore, the correct answer which includes only the spectator ions is:

NH4+(aq), NO3−(aq)