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Unformatted text preview: questions below and identify the unknown solute. Expermimental Results Mass of solvent 10.117 g Freezing point of pure solvent 24.8 °C Freezing point depression constant (K f ) of the solvent 8.95 °C/m Mass of solution 10.924 g Freezing point of solution 18.9 °C a. What mass of solute was used? .807 g b. What is the freezing point depression, T f , of the solution? 5.9 °C c. What is the colligative molality, m c , of the soltion? .66 m d. Assuming a van't Hoff factor (i) of 1, how many moles of solute are present in solution? .0067 moles e. What is the molar mass of the solute? 120 g/mol f. From the list below, what is the unknown? Unknown Molar Mass Crisco Vegetable Oil 605 g/mol Havoline Motor Oil 511 g/mol Rosonol Lighter Fluid 121 g/mol Crisco Vegetable Oil Havoline Motor Oil Rosonol Lighter Fluid...
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This note was uploaded on 03/18/2011 for the course CHEM 202 taught by Professor Feducia during the Spring '09 term at N.C. State.
- Spring '09