|Class 12 Chemistry Surface Chemistry||Adsorption isotherms|
The variation in the amount of gas adsorbed by the adsorbent at constant temperature with change in pressure is shown by a curve called adsorption isotherm.
Freundlich adsorption Isotherm:
If there are solutions involved, the above equations become
Where x -> amount of adsorbate
m-> mass of adsorbent
C-> concentration of adsorbate
K and n->constants , n>1 always
Looking at equation 2, as we plot log x/m versus log p on a graph, we get a straight line with slope=1/n and y- intercept= log k.