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Freezing point depression
Principle: The freezing point of a solution is lower than that of the pure solvent. The depression of the freezing point can be determined experimentally using a suitable apparatus (cryoscopy). If the cryoscopic constants of the solvent are known, the molecular mass of the dissolved substances can be determined.
Tasks:
1. Determine the size of freezing point depression after dissolving a strong electrolyte (NaCI) in water. By comparing the experimental value with the theoretical one predicted for this concentration, determine the number of ions into which the electrolyte dissociates.
2. Determine the apparent molar mass of a non-electrolyte (hydroquinone) from the value of freezing point depression.
| Artikel-Nr. | Artikelbezeichnung |
|---|---|
| P2340400 | Freezing point depression |
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