50 ml of 1 M oxalic acid (mol. wt. = 126) is shaken with 0.5 g of wood charcoal. The final concentration of soultion after adsorption is 0.5 M. Calculate the amount of oxalic acid adsorbed per gram of charcoal.

Options

A. 3.45 gm
B. 3.15 gm
C. 6.30 gm
D. None of these

Explanation

Amount of oxalic acid in given solution
`50/1000 MO`
Mass of oxalic acid `0.05 times 90 =4.5 gm`
Amount of oxalic acid remaining `0 50/100 0`,
Mass of oxalic acid= 2.25 gm
Amount absorbed (4.5-2.25)gm=2.25 gm
Mass of oxalic acid absorbed per gram=`2.25 =4.5`
0.5