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Question
Answer in one sentence:
Write an equation for Freundlich adsorption isotherm.
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Solution
Freundlich proposed the following empirical equation for the adsorption of a gas on a solid.
Variation of x/m with P according to Freundlich equation (Adsorption isotherm)
`"x"/"m" = "k""P"^(1//"n")` (n > 1) ....(i)
where,
x = Mass of the gas adsorbed
m = Mass of the adsorbent
`"x"/"m"` = Mass of gas adsorbed per unit mass of adsorbent
P = Equilibrium pressure
k and n are constants which depend on the nature of adsorbate, adsorbent and temperature.
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