In the quantitative estimation of carbon and hydrogen, the combustion products and are passed throug — Qualitative and Quantitative Analysis Chemistry Question
Question
In the quantitative estimation of carbon and hydrogen, the combustion products $CO_2$ and $H_2O$ are passed through specific absorbing reagents. Which of the following accurately represents the standard reagents used?
Answer: B
💡 Solution & Explanation
In Liebig's combustion method, the water vapor produced is absorbed by anhydrous calcium chloride ($CaCl_2$) or magnesium perchlorate ($Mg(ClO_4)_2$), causing an increase in mass. The carbon dioxide ($CO_2$) is subsequently absorbed by a concentrated solution of potassium hydroxide ($KOH$), which reacts to form $K_2CO_3$.
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