Please answer thoroughly and show all calculations so I can learn how to do it e
ID: 786802 • Letter: P
Question
Please answer thoroughly and show all calculations so I can learn how to do it exactly.
Use the following questions to assist in determining the molecular mass of the unknown. Be sure to show all calculations. Include the proper significant figures and units! Determine the Delda Tf for the two trials performed. Using the Kf for acetic acid, determine the molality of the solutions for the two trials performed using the equation for freezing point depression in the introduction. Covert the mass of acetic acid from g to kg for each trial. Use the mass of acetic acid in each solution and the molality of the solution calculated in #2 to determine the number of mol of unknown present in each solution. Determine the molecular weight of the unknown using the mass weighed out for each trial. Calculate the average molecular weight of the unknown based on the two trials.Explanation / Answer
deltaTf =Kf molality
freezing pt of solvent - freezing pt. of solution = Kf * molality