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

Options

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

Answer

B

Explanation

Mass of acetic acid before adsorption `=(ENV)/(1000)`
`=(60xx0.06xx50)/(1000)=0.18 g`
Mass of acetic acid after adsorption `=(ENV)/(1000)=(60xx0.042xx50)/(1000)`
`=0.126 g`
Mass of acetic acid adsorption per gram of charcoal
`=(0.18-0.126)/(3)=0.018 g`
`=18` mg