Question

(a) What happens when CO2, is passed through lime water? (b) What do we observe when excess of CO is passed through lime water?(c) Write balanced chemical
reactions in both cases.​

Answer 1

Answer:

when CO2 gas is passed through lime water it turns milky due to the formation of calcium carbonate which formula is CaCO3. when excess of carbon dioxide is passed through calcium carbonate calcium hydrogen carbonate is formed and solution become colourless.Apr 23, 2018

Explanation:

When it is passed on with carbon dioxide gas, it turns the lime water milky due to the formation of a white precipitate of calcium carbonate. The equation for the reaction of lime water and carbon dioxide follows: Hence, the equation for this reaction is given above

Answer 2

$Ca(OH)2(aq) + CO2(aq)$  → $CaCO_3(s)$ ↓  +$H_2O(l)$

Explanation:

• Limewater  is C a ( O H ) 2 ( a q ) . is saturated.

• The reaction of lime water with carbon dioxide is as follows -

    $Ca(OH)2(aq) + CO2(aq)$  → $CaCO_3(s)$ ↓  +$H_2O(l)$

  (a) When CO2 gas is passed through lime water it turns milky due to the formation of calcium carbonate [CaCO3] which precipitates as a milky white precipitate.

   (b) When an excess of carbon dioxide is passed through calcium carbonate calcium hydrogen carbonate is formed and the solution becomes colorless.