Chemistry, 11.02.2020 22:46 sydthekid25

Another way that freezing point depression can be useful is to experimentally determine the molar mass of an unknown solute in a solution. Use the data in the table to answer the questions below and identify the unknown solute. Experimental Results Mass of solvent 10.868 g Freezing point of pure solvent 24.5°C Freezing point depression constant (Kf) of the solvent 9.33°C/m Mass of solution 11.516 g Freezing point of solution 19.9°C (a) What mass of solute was used? WebAssign will check your answer for the correct number of significant figures. Incorrect: Your answer is incorrect. g (b) What is the freezing point depression ΔTf of the solution? WebAssign will check your answer for the correct number of significant figures. Incorrect: Your answer is incorrect. °C (c) What is the colligative molality mc of the solution? WebAssign will check your answer for the correct number of significant figures. m (d) Assuming a van 't Hoff factor i = 1, how many moles of solute are present in solution? WebAssign will check your answer for the correct number of significant figures. mol (e) What is the molar mass of the solute? WebAssign will check your answer for the correct number of significant figures. g/mol (f) Use the data in the table below to answer the question. Molar Mass of Household Products Crisco Vegetable Oil 605 g/mol Havoline Motor Oil 511 g/mol Rosonol Lighter Fluid 121 g/mol What is the unknown solute? Crisco Vegetable Oil Havoline Motor Oil Rosonol Lighter Fluid?

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