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van 't Hoff factor
This term is a specialized technical expression used almost exclusively in chemistry and thermodynamics to describe the effect of solutes on colligative properties. It quantifies the extent to which a solute dissociates or associates in a solvent, which is critical for calculating boiling point elevation and freezing point depression.
Because it is a specific scientific constant associated with a particular substance in a given solvent, it is treated as a singular conceptual entity. In academic writing, it is always capitalized as 'van 't Hoff' to honor the Dutch chemist Jacobus Henricus van 't Hoff.
Meanings
Examples
The van 't Hoff factor for sodium chloride is typically two because it dissociates into two ions.
I wonder if the van 't Hoff factor will change as the concentration increases.
For a non electrolyte like glucose, the van 't Hoff factor is equal to one.
Remember to include the van 't Hoff factor when calculating the boiling point elevation.
The measured osmotic pressure was higher than expected, suggesting a higher van 't Hoff factor.
Does the van 't Hoff factor account for ion pairing in concentrated solutions?
The van 't Hoff factor represents the number of particles produced per formula unit of solute.
He struggled to understand why the van 't Hoff factor for aluminum chloride is three.
Calculating the freezing point depression requires an accurate value for the van 't Hoff factor.
Calculating the freezing point depression requires an accurate value for the van 't Hoff factor.