50ml of 1M oxalic acid is shaken with `0.5g` of wood charcoal. The final concentration of the solution after adsorption is 0.5M. Amount of oxalic acid absorbed per gm of charcoal is

Options

A. 3.15 g
B. 3.45 g
C. 6.30 g
D. None

Answer

A

Explanation

Amount of oxalic acid initially present
`=(1xx50)/(1000)xx63=3.15 g`
Amount of oxalic acid after adsorption
`=(50)/(1000)xx(63)/(2)=(3.15)/(2)=1.575g`
Amount absorbed `=3.15-1.575=1.575 g`
Amount absorbed per gram `=1.575xx2`
=3.15 gm