5-6 Recognize chemical equations for precipitation reactions

5-6-1. Which of the following is a precipitation reaction?
A. Na₂CO₃(aq) + 2 AgNO₃(aq) → Ag₂CO₃(s) + 2 NaNO₃(aq)
B. 2 Mg(s) + O₂(g) → 2 MgO(s)
C. HCl(aq) + NaOH(aq) → NaCl(aq) + H₂O(l)

5-6-JJW. Which of the following represents a precipitation reaction?
A. KOH + HCl → H₂O + KCl
B. KCl + AgNO₃ → AgCl + KNO₃
C. 2 KClO₃ → 2 KCl₃ + 3 O₂