This reaction involves several steps:

Calcium oxide (CaO) reacts with water (H2O) to form calcium hydroxide (Ca(OH)2):

CaO + H2O → Ca(OH)2

Calcium hydroxide (Ca(OH)2) then reacts with hydrochloric acid (HCl) to form calcium chloride (CaCl2):

Ca(OH)2 + 2HCl → CaCl2 + 2H2O

Finally, silver nitrate (AgNO3) is added to the solution, resulting in the formation of silver chloride (AgCl) due to a double displacement reaction:

CaCl2 + 2AgNO3 → 2AgCl + Ca(NO3)2

Overall, the complete reaction sequence can be summarized as:

CaO + H2O + 2HCl + 2AgNO3 → CaCl2 + 2AgCl + 2H2O + Ca(NO3)2