In Liebig's combustion method, which absorbents are used strictly in series to sequentially trap fir — Practical Organic Chemistry and Purification Chemistry Question

💡 Solution & Explanation

The $CaCl_2$ U-tube must come first to absorb moisture. If $KOH$ were first, it would absorb both $CO_2$ and $H_2O$, ruining the individual gravimetric estimations.