To deeply analyze the adsorption of a solute from a dilute solution onto a solid adsorbent, the empi — Surface Chemistry Chemistry Question
Question
To deeply analyze the adsorption of a solute from a dilute solution onto a solid adsorbent, the empirical Freundlich isotherm is mathematically modified. What specific parameter strictly replaces the partial pressure ($P$) in this exact modified equation?
💡 Solution & Explanation
When utilizing the empirical Freundlich isotherm for liquid solutions ($\frac{x}{m} = kC^{1/n}$), the pressure term ($P$) is rigorously replaced by the exact concentration ($C$). Crucially, this $C$ must exclusively represent the final dynamic equilibrium concentration of the solute remaining in the bulk, never the initial starting concentration.