Same chapter3 marksDifficulty: Medium
Calculate the molality of a solution containing 18 g of glucose in 500 g of water. (Molar mass of glucose = 180 g)
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3 marksDifficulty: Medium
What is the van't Hoff factor, and what values does it take for sodium chloride and for acetic acid in benzene?
Original Khojo Papers practice question — not from a past board paper.
Answer
The van't Hoff factor is the ratio of the observed colligative property to the value calculated on the assumption that the solute neither associates nor dissociates. For sodium chloride in water it approaches 2 because the salt dissociates into two ions; for acetic acid in benzene it approaches 0.5 because the acid dimerises.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
A factor greater than one indicates dissociation and less than one association.
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