Case: Read the paragraph and answer the following questions
Colligative properties are not dependent on the chemical nature of the solution’s components. Thus, colligative properties can be linked to several quantities that express the concentration of a solution, such as molarity, normality, and molality. Boiling point elevation, freezing point depression, Relative lowering of vapour pressure and Osmotic pressure are the major colligative properties exhibited by solutions. In 1880 van’t Hoff introduced a factor i, known as the van’t Hoff factor, to account for the extent of dissociation or association.
What is the correct expression for van't Hoff's factor (i)?
Answer & explanation
Correct answer: option 3
van't Hoff's facrot can be calculated in many ways;
i = (Normal molar mass / Abnormal molar mass)
i = (Observed colligative property / Calculated colligative property)
i = [(Total number of moles of particles after association/dissociation)/(Number of moles of particles before association/dissociation)]