The Total solution for NCERT class 6-12
Why is a solution ofpotassium hydroxide used to absorb carbon dioxide evolved during the estimationof carbon present in an organic compound?
Carbon dioxide is acidicin nature and potassium hydroxide is a strong base. Hence, carbon dioxidereacts with potassium hydroxide to form potassium carbonate and water as
Thus, the mass of theU-tube containing KOH increases. This increase in the mass of U-tube gives themass of CO2 produced. From its mass, the percentage of carbonin the organic compound can be estimated.