Ideal & Non Ideal solutions, Comparison between Ideal & Non Ideal Solutions, Deviation from Raoult’s Law

1. SOLUBILITY – 7
IDEAL & NON-IDEAL
SOLUTIONS
Presented By:
Mr. S.M. Ambore
Asst. Professor,
DK Patil Institute of Pharmacy, Loha. Nanded

2. LEARNING OUTCOMES….
Ideal Solutions
Non Ideal Solutions
Comparison between Ideal &
Non Ideal Solutions
Deviation from Raoult’s Law 2

3. 3
IDEAL SOLUTIONS
The solutions in which the interaction between
molecules of the components does not differ from the
interactions between the molecules of each component in
pure form.
That means these are those solutions which follows
the Raoult’s law.

4. 4
NON IDEAL SOLUTIONS
The solutions in which the interaction between
molecules of the components differ from the interactions
between the molecules of each component in pure form.
That means these are those solutions which does
not follows the Raoult’s law.

5. 5
Ideal Solutions
PA = PA
0 XA
PB = PB
0 XB
Hmixing = 0
Vmixing = 0
solute-solute =
solvent- solvent =
solute-solvent
Eg. Benzene-Toluene,
Chlorobenzene-Bromobenzene
Non Ideal Solutions
PA = PA
0 XA
PB = PB
0 XB
Hmixing = 0
Vmixing = 0
solute-solute =
solvent- solvent =
solute-solvent
Eg. Alcohol-Water,
Phenol-Water

6. 6
+VE DEVIATION
PA > PA
0 XA
PB > PB
0 XB
PTOTAL > PA + PB
Hmixing > 0
Vmixing > 0
-VE DEVIATION
PA < PA
0 XA
PB < PB
0 XB
PTOTAL < PA + PB
Hmixing < 0
Vmixing < 0
NON IDEAL SOLUTIONS

7. IDEAL SOLUTION
7
DKPatilInstituteofPharmacy
PA = PA
0 XA
PB = PB
0 XB
PTOTAL = PA + PB

8. DEVIATION FROM RAOULT’S LAW
8
DKPatilInstituteofPharmacy
+VE DEVIATION -VE DEVIATION
PA > PA
0 XA
PB > PB
0 XB
PTOTAL >PA + PB
PA < PA
0 XA
PB < PB
0 XB
PTOTAL <PA + PB

9. 9
+VE DEVIATION
A – B < A-A + B-B
Intermolecular force of
of attraction between
Solute –Solvent is less
less causing more vapor
vapor pressure
-VE DEVIATION
A – B > A-A + B-B
Intermolecular force of
of attraction between
Solute –Solvent is more
more causing less vapor
vapor pressure
NON IDEAL SOLUTIONS

10. 10
Ambore Sandeep