Question

Represent the reaction between carbon dioxide and lime water with chemical reaction.

Answer 1

CO2(g) + Ca(OH)2(aq) -----> CaCO3(s) + H2O(l)

When carbon dioxide react with carbon hydroxide ( lime water ) it form calcium carbonate and water.

Answer 2

Explanation:

CO2 (g) + H2O (l) <=> H2CO3 (aq)

Ca(OH)2 (aq) + H2CO3 (aq) <=> CaCO3 (s) + 2 H2O (l) Ksp = 2.8 x 10-9

Excess CO2 or H2CO3 , however, reacts with the CO3 2- ion in this solution to form HCO3 -.

H2CO3 (aq) + CO3 2- (aq) <=> 2 HCO3 - (aq)

Since calcium bicarbonate is soluble in water, the CaCO3 precipitate dissolves in the presence of excess carbonic acid.

CaCO3 (s) + H2CO3 (aq) <=> Ca 2+ (aq) + 2 HCO3 - (aq)