Question

pls tell the difference between the negative and positive adsorption? i cant get the difference properly.

Answer 1

$positive \: adsorption -$

if the concentration of adsorbate is more on the surface as compare to its concentration in the bulk phase then it is called positive adsorption.

$negative \: adsorption -$

if the concentration of adsorbate is less than and its concentration in the bulk face then it is called negative adsorption.