3. A scientist determines themolecular mass of a substanceexperimentally by colligativeproperties. But it is differentfrom those calculated from themolecular formulae.(i) What may be the reason for thisabnormal result?(ii) Explain your reason.(2)

3. A scientist determines themolecular mass of a substanceexperimental

1.	3. A scientist determines themolecular mass of a substanceexperimentally by colligativeproperties. But it is differentfrom those calculated from themolecular formulae.(i) What may be the reason for thisabnormal result?(ii) Explain your reason.(2)
Answer» <p>due to association or dissociation of the particles there may be some abnormal change in the molar mass of the substance.Such a molar mass, whose value is higher or lower than its expected value is known asAbnormal Molar Mass.For Example, weak electrolytes dissociate in water to form ions, example Hydrofluoric Acid (HF), dissociate into hydrogen cation and fluorine anion.</p>