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Unformatted text preview: point of the substance with water dissolved into it. Then, by using the formula ΔT f = K f ( m ), the K f of water could be determined. 3. Properties of the New Solvent Properties to be considered are freezing point depression, polarity, and purity of the solvent. 4. Using Freezing Point Depression to Assess Purity If the sample is not pure, the freezing point depression will differ from the expected value. Any additional substance in the sample will alter the experimental freezing point that is determined. 5. Limitations of this Procedure If the actual molecular weight was around 750 g/mol, the experiment would take a much longer time because the substance would have to be melted and freeze again. The freezing point of such a substance would possibly be inaccurate because of the long waiting time....
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This note was uploaded on 06/28/2011 for the course CH 118 taught by Professor March during the Spring '09 term at University of Alabama at Birmingham.
- Spring '09