Write the reaction equation: CaCO3 → CO2 → CaCO3 → Ca (HCO3) 2 → CaCl2 → AgCl

1) When heated, calcium carbonate decomposes into calcium oxide and carbon dioxide:

CaCO3 → CaO + CO2;

2) When carbon dioxide and calcium hydroxide interact, we get – calcium precipitate and water:

CO2 + Ca (OH) 2 → CaCO3 ↓ + H2O;

3) Calcium carbonate reacts with water and carbon dioxide, we get – calcium bicarbonate:

CaCO3 ↓ + H2O + CO2 → Ca (HCO3) 2;

4) Calcium bicarbonate reacts with hydrochloric acid and calcium chloride, carbon dioxide and water are formed:

Ca (HCO3) 2 + 2HCl → CaCl2 + 2CO2 + 2H2O;

5) Calcium chloride reacts with silver nitrate, as a result of the presented reaction, calcium nitrate and a precipitate of silver chloride are formed

CaCl2 + 2AgNO3 → Ca (NO3) 2 + 2AgCl ↓.