Why is a solution of potassium hydroxide used to absorb carbon dioxide evolved during the estimation of carbon present in an organic compound?
(N/A) Carbon dioxide $(CO_2)$ is acidic in nature,while potassium hydroxide $(KOH)$ is a strong base.
When $CO_2$ gas is passed through the $KOH$ solution,it reacts to form potassium carbonate $(K_2CO_3)$ and water $(H_2O)$ according to the following chemical equation:
$2KOH + CO_2 \longrightarrow K_2CO_3 + H_2O$
As a result,the mass of the $U$-tube containing $KOH$ increases.
This increase in the mass of the $U$-tube corresponds to the mass of $CO_2$ produced during the combustion of the organic compound.
By measuring this mass,the percentage of carbon in the organic compound can be accurately calculated.
When $CO_2$ gas is passed through the $KOH$ solution,it reacts to form potassium carbonate $(K_2CO_3)$ and water $(H_2O)$ according to the following chemical equation:
$2KOH + CO_2 \longrightarrow K_2CO_3 + H_2O$
As a result,the mass of the $U$-tube containing $KOH$ increases.
This increase in the mass of the $U$-tube corresponds to the mass of $CO_2$ produced during the combustion of the organic compound.
By measuring this mass,the percentage of carbon in the organic compound can be accurately calculated.
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