when a compound X is to partition between two solvents Y and Z, comment on the m
ID: 529558 • Letter: W
Question
when a compound X is to partition between two solvents Y and Z, comment on the molecular interactions of compound X with each of the two solvents if a) the activity coeffiicient Y is very large in Y and close to unity (1) in Z b) the activity coefficient Y is close to unity (1) in Y and less than unity in (1) in Z
a compound x" is to particion between two solvents rand -z, comment on the molecular interactions ofCompound"X" with each ofthe two the activity coemicient cmis very large in r and close to unity (t)in z (i) the activity coeficient emisekse la unity in"Y and less than unity (i) 4mks 3. The same compound in question 2 (b) is found to have a density of 0.7 em and vapor pressure of 10 Pascal in its pure fom. Given that this compound is hexane (C&Hai;), calculate the air -liquid partition constant at 25 8 mksl.Explanation / Answer
a) The activity co-effecient is very large in solvent Y (>1), that indicates a postive deviation from ideal behaviour which implies that the interaction between molecules of X and Y is low compared to interaction between two molecules of X or two molecules of Y. If it is close to unity in solvent Z, it means X behaves ideally in Z where the interaction between a molecule of X and that of Z is almost same as between two molecules of X and two molecules of Z. So, X will have more tendency to be in solvent Z than solvent Y.
b) If the activity co-effecient is close to unity in Y, then X behaves ideally in Y and less than unity in Z means the molecules interact very strongly with each other i.e. the interaction between molecules of X and Y is stronger than between two molecules of X or two molecules of Z. So, X will be almost completely in solvent Z.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.