Aqueous chromium (III) sulfate reacts with aqueous ammonium carbonate.
The Correct Answer and Explanation is :
When aqueous chromium(III) sulfate reacts with aqueous ammonium carbonate, a double displacement reaction occurs. The chromium(III) sulfate and ammonium carbonate exchange their ions to form chromium(III) carbonate and ammonium sulfate. The balanced chemical equation for this reaction is:
[
2 \, \text{Cr}_2(\text{SO}_4)_3 (aq) + 3 \, \text{(NH}_4)_2\text{CO}_3 (aq) \rightarrow 2 \, \text{Cr}_2\text{(CO}_3)_3 (s) + 3 \, \text{(NH}_4)_2\text{SO}_4 (aq)
]
Here’s how the reaction proceeds:
- Ionization of Reactants: In water, chromium(III) sulfate dissociates into Cr³⁺ and SO₄²⁻ ions. Ammonium carbonate dissociates into NH₄⁺ and CO₃²⁻ ions.
- Exchange of Ions: The Cr³⁺ ions from chromium(III) sulfate react with CO₃²⁻ ions from ammonium carbonate to form chromium(III) carbonate (Cr₂(CO₃)₃), which is a solid precipitate.
- Formation of Ammonium Sulfate: The NH₄⁺ ions from ammonium carbonate combine with SO₄²⁻ ions from chromium(III) sulfate to form ammonium sulfate, (NH₄)₂SO₄, which remains dissolved in the solution.
The reaction is typically carried out in aqueous solution, and chromium(III) carbonate precipitates as a green solid. The other product, ammonium sulfate, is soluble in water and remains in the solution.
Explanation:
Chromium(III) sulfate is an aqueous compound, where chromium exists in the +3 oxidation state, and sulfate ions are present. Ammonium carbonate is also aqueous and dissociates into ammonium (NH₄⁺) and carbonate (CO₃²⁻) ions. When these two solutions are mixed, the Cr³⁺ ions combine with CO₃²⁻ ions to form chromium(III) carbonate, which is insoluble in water and thus precipitates out of the solution. The ammonium ions combine with sulfate ions to form ammonium sulfate, which is soluble in water and stays in the solution.
I will now generate an image depicting the reaction.
Here is an illustration of the chemical reaction between aqueous chromium(III) sulfate and aqueous ammonium carbonate. You can see the green precipitate of chromium(III) carbonate forming, while ammonium sulfate remains dissolved in the solution. Let me know if you’d like further details or adjustments!
