Q. 84.5( 4 Votes )

Define the follow

Answer :

(i) Abnormal molar mass


The calculated molar mass of a substance which is either less or more than the one observed using the colligative properties of solutions is called abnormal molar mass. Abnormal molar mass generally occurs as a result of dissociation or association of molecules.


(ii) van’t Hoff factor – (i)


The ratio of observed colligative property to the calculated colligative property is known as van’t Hoff factor (i). Since colligative property is directly linked with molar mass, i is also defined as ratio of normal molar mass to abnormal molar mass.


i = =


=


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