How Does Carbon Dioxide React with Lime water?


What happens when Lime Water reacts to Carbon Dioxide?

Carbon dioxide reacts with limewater to form calcium carbonate, which precipitates out of the solution. The carbon dioxide and limewater react to produce calcium carbonate and water. Calcium carbonate is chalk, and when it is produced, it precipitates and solid particles of chalk appear. The appearance of this solid makes the liquid appear ‘milky’. The white milky suspension/precipitate is caused by the formation of calcium carbonate. The characteristic test for CO2, is checking that the limewater is milky. This is because chalk is precipitating in the limewater. Bubbling carbon dioxide through the solution for an extended period of time makes the solution become clear and colourless. This happens as the carbon dioxide forms acidic carbonic acid when it dissolves in the water, the carbonic acid (H2CO3) reacts further with the calcium carbonate: CO2 + H2O ——> H2CO3H2CO3 +CaCO3 ——–> Ca(HCO3)2 Ca(HCO3)2 = calcium hydrogen carbonate which is soluble in water. This chemistry is important in understanding how hard water is formed and then limescale is formed in kettles and hot water boilers.

Carbon dioxide and lime water experiment
What happens when you mix carbon dioxide and lime water?

Written as an Equation

In its equation form that makes: CO2 + Ca (OH)2 -----> ? CO2 + Ca(OH)2 —-> CaCO3 + H2O

Answers
CO2 + Ca(OH)2 ----> CaCO3 + H2OHowever this is not an in depth answer, there's much more going on and the reaction can also reverse.
David C.
14 September 2015
CaCO3 +H20This means that the carbon dioxide and limewater react to produce calcium carbonate and water. Calcium carbonate is chalk, and when it is produced, it precipitates (i.e. solid particles of chalk appear). The appearance of this solid makes the liquid appear 'milky'. Thus, the characteristic test for CO2, is that bubbling it through limewater will turn the limewater milky. This is because chalk is precipitating in the limewater.
Joe O.
15 September 2015
CO2(g) + Ca(OH)2(aq) -----> CaCO3(s) + H2O(l)The white milky suspension/precipitate is caused by the formation of calcium carbonate and explains the limewater  test for carbon  dioxide.Bubbling carbon dioxide through the solution for an extended period of time makes the solution become clear and colourless as the carbon dioxide forms acidic carbonic acid when it dissolves in the water, the carbonic acid (H2CO3) reacts further with the calcium carbonate:CO2 + H2O ------> H2CO3H2CO3 +CaCO3 --------> Ca(HCO3)2 Ca(HCO3)2 = calcium hydrogen carbonate which is soluble in water.This chemistry is important in understanding how hard water is formed and then lime scale is formed in kettles and hot water boilers.
Alastair B.
11 October 2015
CaCO3 + H2O (Calcium Carbonate and Water)
alinag
27 July 2016
Carbon dioxide reacts with limewater to form calcium carbonate, which precipitates out of the solution. The carbon dioxide and limewater react to produce calcium carbonate and water. Calcium carbonate is chalk, and when it is produced, it precipitates and solid particles of chalk appear. The appearance of this solid makes the liquid appear ‘milky’. The white milky suspension/precipitate is caused by the formation of calcium carbonate. The characteristic test for CO2, is checking that the limewater is milky. This is because chalk is precipitating in the limewater. Bubbling carbon dioxide through the solution for an extended period of time makes the solution become clear and colourless. This happens as the carbon dioxide forms acidic carbonic acid when it dissolves in the water, the carbonic acid (H2CO3) reacts further with the calcium carbonate: CO2 + H2O ——> H2CO3H2CO3 +CaCO3 ——–> Ca(HCO3)2 Ca(HCO3)2 = calcium hydrogen carbonate which is soluble in water. This chemistry is important in understanding how hard water is formed and then limescale is formed in kettles and hot water boilers.
Joe mama
21 February 2021
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