Chemistry - Surface Chemistry Question with Solution | TestHub

To form a complete monolayer of acetic acid on $1\mathrm{g}$ of charcoal, $100\mathrm{mL}$ of $0.5\mathrm{M}$ acetic acid was used. Some of the acetic acid remained unadsorbed. To neutralize the unadsorbed acetic acid, 40 $\mathrm{mL}$ of $1\mathrm{M}\mathrm{NaOH}$ solution was required. If each molecule of acetic acid occupies $\mathbf{P}\times 10^{-23}{\mathrm{m}}^2$ surface area on charcoal, the value of $\mathbf{P}$ is _______ [Use given data: Surface area of charcoal $=1.5\times 10^2{\mathrm{m}}^2{\mathrm{g}}^{-1};$ Avogadro's number $\left({\mathrm{N}}_{\mathrm{A}}\right)=6.0\times 10^{23}$ ${\mathrm{mol}}^{-1}]$