Post-Lab Worksheet:

Percent and Mole Solutions

1. Which molar solution required the most solute to be added to it? Which required the least? Why, explain your answer?
   
   
   
   
   
2. What was the uncertainty in the mass measurements of your solids?
   
   
   
   
   
3. What was the uncertainty in the mass measurements of your solvent (water) for the mole solutions?
   
   
   
   
   
4. What was the uncertainty in the mass measurements of your solvent (water) for the mass percent solutions?
   
   
   
   
   
5. Using the min/max error analysis calculate the total uncertainty in the molarity of your molar solutions. Also calculate the uncertainty in the mass percent and in the density of your mass percent solutions.
   
   
   
   
   

© 2009-10 Secondary Science Education. All Rights Reserved.