Colligative properties of a solution depend upon the number of moles of a solute dissolved and do not depend upon the nature of the solute. However, they are applicable only to dilute solutions in which the solutes do not undergo any association or dissociation. For solutes undergoing such changes, van't Hoff introduced a factor, called van't Hoff factor (i). This has helped not only to explain the abnormal molecular masses of such solutes in the solution but has also helped to calculate the degree of association or dissociation. The van't Hoff factor for 0.1 M Ba(NO_(3))_(2) solution is 2.74. The degree of dissociation is

Colligative properties of a solution depend upon the number of moles o

1.	Colligative properties of a solution depend upon the number of moles of a solute dissolved and do not depend upon the nature of the solute. However, they are applicable only to dilute solutions in which the solutes do not undergo any association or dissociation. For solutes undergoing such changes, van't Hoff introduced a factor, called van't Hoff factor (i). This has helped not only to explain the abnormal molecular masses of such solutes in the solution but has also helped to calculate the degree of association or dissociation. The van't Hoff factor for 0.1 M Ba(NO_(3))_(2) solution is 2.74. The degree of dissociation is
Answer» `91.3%` `87%` `100%` `74%` Solution :`{:(,Ba(NO_(3))_(2),hArr,Ba^(2+),+,2NO_(3)^(-)),("INITIAL","1 MOLE",,,,),("After disso.",1-ALPHA,,alpha,,2ALPHA","):}` Total `=1+2alpha therefore i=1+2alpha` `or alpha=(i-1)/(2)=(2.72-1)/(2)=0.87=87%.`