Question
For 1 molal aqueous solution of the following compounds, which one will show the highest freezing point?
[Co(H2O)3 Cl3].3H2O
[Co(H2O)6]Cl3
[Co(H2O)5Cl] Cl2.H2O
[Co(H2O)4Cl2]Cl.2H2O
Solution
A.
[Co(H2O)3 Cl3].3H2O
The complex giving least number of ions will have lowest depression in freezing point and therefore highest freezing point.(Van’t Hoff factor = 1)
