Question

Determine the molar mass of the solute. If 2.35 g of the unknown compound were dissolved in 30.46 g of PDB ( Kfp for PDB = 7.10 C/m)

m=molality = moles solute/kg solvent Molar mass= grams of substance/mole of substance

1. Molar mass of solute is___________

On this molar mass calculation in a freezing point depression experiment determine the effect on molar mass, will it be higher, lower, or not change.

2. The thermometer you were using read temperatures consistently 1.2 C higher than the real temperatures. Effect on molar mass ??

3. You knowingly added 3 g of unknown solute during your freezing point determination instead of 2 g. Effect on molar mass ??

4. In Adding your unknown solute to your solvent, you spilled some solute onto the table after weighing. Effect on molar mass ??

Explain all 3

Answer 1