Question

50 ml of 1M oxalic acid is shaken with 0.5 g of wood charcoal. The final concentration of the solution after adsorption is 0.5 M. Calculate the amount of oxalic acid adsorbed per gram charcoal.

• A. 1.575 g
• B. 0.05 g
• C. 3.15 g
• D. None

Answer 1

The correct option is C

3.15 g

Amount of oxalic acid present initially $=1\times \frac{50}{1000}\times 63=3.15g$
Amount after adsorption $=0.5\times \frac{50}{1000}\times 63=1.575g$
Amount adsorped =1.575g
$\therefore$ Adsorption per gram $=\frac{1.575}{0.5}=3.15g$