Answer
The precipitation reaction is: AgNO₃ (aq) + KCl (aq) → AgCl (s) + KNO₃
Procedure
Precipitation reactions occur when cations and anions in an aqueous solution combine to form an insoluble ionic solid called a precipitate.
Reaction 1
Mg + O₂ → MgO₂
This is a synthesis and redox reaction, the product is a white or off-white powder.
Reaction 2
NaOH + HCl → H₂O + NaCl
This is an acid-base reaction (neutralization): NaOH is a base, and HCl is an acid.
Reaction 3
2H₂ (g) + O₂ (g) → 2 H₂O
This is a synthesis or redox reaction.
Reaction 4
AgNO₃ (aq) + KCl (aq) → AgCl (s) + KNO₃
This is a precipitation reaction: AgCl is the formed precipitate.