Question

3 $g$ of activated charcoal was added to 50 $mL$ of acetic acid solution (0.06 $N$) in a flask. After an hour, it was filtered and the strength of the filtrate was found to be 0.042 $N$. The amount of acetic acid adsorbed (per gram of charcoal) is:

• A. 18 $mg$
• B. 36 $mg$
• C. 42 $mg$
• D. 54 $mg$

Answer 1

The correct option is A 18 $mg$

Initial millimoles of $C{H}_{3}COOH=0.06\times 50$
Final millimoles of $C{H}_{3}COOH=0.042\times 50$

The mass of $C{H}_{3}COOH$ adsorbed per gram of charcoal is,
=$\frac{(0.06-0.042)\times 50\times {10}^{-3}\times 60\times {10}^{-3}}{3}$=18 $mg$