Why is a solution of KOH used to absorb CO2 evolved during the
estimation of carbon present in an organic compound?
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Carbon dioxide is acidic in nature and potassium hydroxide is a strong base. Hence, carbon dioxide reacts with potassium hydroxide to form potassium carbonate and water as 2KOH + CO2 ---> K2CO3 + H2O Thus, the mass of the U-tube containing KOH increases.
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