Question

A student prepares calcium hydrogen carbonate instead of calcium carbonate while passing carbon dioxide through lime water. Write your conclusion with chemical equation?

Answer 1

Answer:

CaCO3 + CO2 +H2O = Ca(HCO3)2

Explanation:

99.9 percentage this equation is right but it is not equivalent so i am not sure but this right

Answer 2

Milkiness disappears when a student prepares calcium hydrogen carbonate instead of calcium carbonate while passing carbon dioxide through lime water.

The chemical reaction will be :

$CaCO_3(s)+H_2O(l)+CO_2(g)\rightarrow Ca(HCO_3)_2(aq)$

Explanation :

There are two cases :

• When the carbon dioxide gas is passed through the lime water, it turns milky first due to the formation of the calcium carbonate as a precipitate which is insoluble in water.

The chemical reaction will be :

$Ca(OH)_2(l)+CO_2(g)\rightarrow CaCO_3(s)+H_2O(l)$

• When the excess carbon dioxide gas is passed through the lime water, its milkiness disappears that means become colorless due to the calcium bicarbonate or calcium hydrogen carbonate which is soluble in water.

The chemical reaction will be :

$CaCO_3(s)+H_2O(l)+CO_2(g)\rightarrow Ca(HCO_3)_2(aq)$

Learn more about : passing of carbon dioxide through lime water

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