Question

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

• A. 3.45 gm
• B. 3.15 gm
• C. 6.30 gm
• D. None

Answer 1

Answer: (C)

6.30 gm

Answer 2

$\mathrm { W } = \frac { 126 \times 1 \times 50 } { 1000 }$⇒ 6.3

(Molecular weight of oxalic acid ⇒163)

$0.5 \mathrm { gm } \rightarrow \frac { 6.3 } { 2 }$

$1 \mathrm { gm } \rightarrow \frac { 6.3 } { 2 \times 0.5 } \times 1$⇒ 6.3 gm.