JEE Main · 2022 · 24 Jun 2022 · Shift 2 · Surface Chemistry

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When 200 mL of 0.2 M acetic acid is shaken with 0.6 g of wood charcoal, the final concentration of acetic acid after adsorption is 0.1 M. The mass of acetic acid adsorbed per gram of carbon is _____ g.

Answer: 2

Solution

Initial moles of acetic acid =

0.2 \times 0.2 = 0.04

mol. Final moles =

0.1 \times 0.2 = 0.02

mol. Moles adsorbed =

0.04 - 0.02 = 0.02

mol. Mass adsorbed =

0.02 \times 60 = 1.2

g. Mass per gram of charcoal =

\frac{1.2}{0.6} = 2

JEE Main · 2022 · 24 Jun 2022 · Shift 2 · Integer answer

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