When I mix CO2 with Ca(OH)2, the solution will become milky, however, when I mix it with excess CO2, it become transparent again. What is the equation for the second reaction?

Question

vincent-lyon.fr · Answer

Tip1: What have you formed in the first reaction?
Tip2: What is the possible reaction between this product and CO2?

anonymous · Answer

1) CaCO3
2) CaCO3+CO2+H2O->Ca(HCO3)2?

anonymous · Answer

thank you very much!

vincent-lyon.fr · Answer

Correct, but I would rather write:

$CaCO_3+CO_2+H_2O-> Ca^{2+}_{\,(aq)} + 2 HCO^-_{3\,(aq)}$

Because there is no solid calcium hydrogencarbonate in the solution.