Question

Which equations represent precipitation reactions? (There is more than one correct answer)

A. Na₂S + FeBr₂ → 2NaBr + FeS
B. MgSO₄ + CaCl₂ → MgCl₂ + CaSO₄
C. LiOH + NH₄I → LiI + NH₄OH
D. 2NaCl + K2S → Na2S + 2KCl
E. AgNO₃ + NaCl → AgCl + NaNO₃

Answer 1

Precipitation reactions occur when two aqueous solutions are mixed and form a solid precipitate. The equations that represent precipitation reactions are: Na₂S + FeBr₂ → 2NaBr + FeS, MgSO₄ + CaCl₂ → MgCl₂ + CaSO₄, and AgNO₃ + NaCl → AgCl + NaNO₃.

Step-by-step explanation:

Precipitation reactions occur when two aqueous solutions are mixed and form a solid precipitate. In these reactions, the cations and anions from the two solutions combine to form an insoluble product.

The equations that represent precipitation reactions are:

1. A. Na₂S + FeBr₂ → 2NaBr + FeS
2. B. MgSO₄ + CaCl₂ → MgCl₂ + CaSO₄
3. E. AgNO₃ + NaCl → AgCl + NaNO₃