Chemistry, asked by Aruyadav, 1 year ago

State your observations and give balanced equations of the reactions when carbon dioxide is passed through clear lime water
(a)for a short time
(b)for a long time

Answers

Answered by ÅmäŁ
3


a) When carbon dioxide is passed through lime water for a short time,it turns lime water milky due to formation of a white precipitate of calcium carbonate.

The reaction is-

 Ca(OH)2  + CO2     CaCO3  + H2O

b) When  carbon  dioxide  gas is  passed  through lime water for a considerable time ,then the white precipitate  of calcium carbonate which is fomed initially as shown in the above reaction ,dissolves due to formation of a soluble salt  calcium hydrogen carbonate and the solution becomes clear again.

The reaction is -

CaCO3 + CO2  + H2O     Ca(HCO3)2

 

 





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Answered by dhruvsh
3
a)when carbondioxide gas is passed through the freshly prepared lime water then the lime water turns milky white due to the formation of a precipitate.
Ca (OH)2 + CO2 ---> CaCO3 + H2O

b) When carbondioxide gas is passed through the lime water for a long time then the lime water again turns trans parent
CaCO3 + H2O +CO2 ---> Ca(HCO3)2.
Thus calcium hydrogen carbonate is formed.

Aruyadav: thanks
dhruvsh: No problem
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