Question

Explain the equation :

Ca(HCO3)2 ----> Ca(CO3) + H2O + CO2
In words, Calcium Bicarbonate arrowhead Calcium Carbonate + Water + Carbon Di Oxide

In HARD water. I can't understand please help. 7th Grader

Answer 1

Answer:

Calcium carbonate react with carbon dioxide and water to produce calcium hydrogen carbonate. The reaction proceeds at room temperature.

CaCO3 + CO2 + H2O → Ca(HCO3)2

Explanation:

In this acidic medium there exists HCO−3 ion and H+.The CO2−3(aq)ions get protonated by this H+ ions and HCO−3 ions are formed. decrease in concentration of CO2−3(aq)ions in solution shifts the above equilibrium towards right and dissolution of more CaCO3(s) in solution takes place.