Solid calcium carbonate is dissolved in dilute hydrochloric acid; CO2 effervesces.
The net ionic equation is:
- Acheck_circle
CaCO3(s) + 2 H+(aq) -> Ca2+(aq) + H2O(l) + CO2(g)
- B
Cl- + H+ -> HCl
- C
H+ + OH- -> H2O
- D
Ca2+ + CO3 2- -> CaCO3
Explanation
Spectator Cl- cancels. Insoluble CaCO3 is written as a unit; H+ reacts with carbonate to liberate CO2 and water, with Ca2+ entering solution.