What precipitate is formed when hydrofluoric acid reacts with calcium carbonate?

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Multiple Choice

What precipitate is formed when hydrofluoric acid reacts with calcium carbonate?

Explanation:
When an acid reacts with a carbonate, the carbonate breaks down to carbon dioxide and water, and the metal cation from the carbonate combines with the anion from the acid to form a salt. Here, calcium from calcium carbonate pairs with fluoride from hydrofluoric acid to give calcium fluoride. Calcium fluoride is sparingly soluble in water, so it appears as a solid precipitate. The overall reaction can be viewed as CaCO3 + 2 HF → CaF2(s) + CO2(g) + H2O(l).

When an acid reacts with a carbonate, the carbonate breaks down to carbon dioxide and water, and the metal cation from the carbonate combines with the anion from the acid to form a salt. Here, calcium from calcium carbonate pairs with fluoride from hydrofluoric acid to give calcium fluoride. Calcium fluoride is sparingly soluble in water, so it appears as a solid precipitate. The overall reaction can be viewed as CaCO3 + 2 HF → CaF2(s) + CO2(g) + H2O(l).

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