Pre lab Information:
1. Particles of a suspension can be separated by filtration, while those of a colloid or a solution cannot because they are too small.
2. The Tyndall effect will reveal the presence of colloidal particles.
Particles separated
by filtration
YES NO
SUSPENSION
filtrate
Tyndall effect
YES NO
COLLOID SOLUTION
Purpose: The purpose of this lab is to classify different mixtures as suspensions, colloids, solutions, or a combination of these,
Materials
Procedure See text p. 26
Data: Copy the 2 data tables from p. 25 & p. 26.
Results:
1. Which of your samples were suspensions? How do you know?
2. Which were colloids? How do you know?
3. Which were solutions? How do you know?
Conclusion:
1. What is the difference between heterogeneous and homogeneous mixtures?
2. Which samples were heterogeneous? Which were homogeneous?