Superb Professors

“PART B: The Freezing Point of an Unknown Ionic Solid – NaCl or KI
Hello, I am currently working on a colligative properties lab report and I am not exactly sure what to do with certain data or how to use it.
1. Using the average normalized freezing points (emailed to you from your TA) of both Unknowns1 and 2, use Equation 1 to calculate the concentrations (in molality) of each unknown.  The freezing point depression constant  of water is 1.86 °C/m.
2. Use Equation 2 to convert each concentration from Step 1 to number of moles for Unknowns 1 and 2.3. Since the freezing point values in Step 1 were normalized to correspond to 2.0 g of unknown,determine the molecular weights of Unknowns 1 and 2 assuming a 2.0 g sample of each.  ”
The ionic unknowns here are NaCl and  KI. The normalized freezing points of unknown 1 is -1.8, and of unknown 2 is -7.7.  I know that equation 1 is DTf=Kfmi, and that equation 2 is m=(mol solute)/(kg solvent). I am not exactly sure what to plug in where, and not very sure what to do for step 3. Help is very appreciated, thank you
 
Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code “Newclient”

The post PART B: The Freezing Point of an Unknown Ionic Solid – NaCl or KI Hello, I am currently working on a colligative properties lab report and I am not exactly sure what to do with certain data or how to use it. appeared first on Superb Professors.

"Order a Custom Paper on Similar Assignment! No Plagiarism! Enjoy 20% Discount"