Chemistry Forums for Students > Physical Chemistry Forum

Is this plotted graphs accord with Langmuir and Freundlich isotherms?

(1/3) > >>

AussieKenDoll:
Is this plotted graphs accord with Langmuir and Freundlich isotherms?

Please see the attached pic

mjc123:
As the axes aren't labelled, it's impossible to say. Tell us what you did and what you have plotted.

AussieKenDoll:
These graphs are for adsorption of acetic acid on charcoal!

On freundlich isotherm graph, x axis -log c ( c= equilibrium concentration)  y axis - log(x/m)  where x= adsorbed charcoal mass, m is the mass of adsorbent

On langmuir isotherm graph , x axis - c ( c= equilibrium concentration)   y axis - c/(x/m)

mjc123:
Have you tried fitting a Freundlich or Langmuir curve to the data? What do you expect the curves to look like?

AussieKenDoll:
I am not sure if my graphs are correct because Freundlich isotherm gives me a negative intercept and a positive slope and Langmuir isotherm gives me a negative slope and a positive intercept which is unusual?

Navigation

[0] Message Index

[#] Next page