For unknown sample #1, there is 2 g of the unknown sample and 10 mL of water. The freezing point was -1.7 C so Td=1.7.
In unknown sample #2, there is 2g of the sample and 10 mL of water. Freezing point = -1.8. So Td = 1.8.
How do I obtain the molecular weights for these two unknown samples?© BrainMass Inc. brainmass.com March 5, 2021, 12:47 am ad1c9bdddf
You have to use molality equations
Molality = moles of solute / kg of solvent
Td = Kf x molality
Hence, Td = Kf ...
The molar mass of unknown samples is calculated from the freezing point data.