Distinguishing Between Solutions

Lab type: 
Virtual lab
Lab owner: 
Prema Nedungadi
Contact person: 
Prema Nedungadi
Age range: 
12-14, 14-16
Language: 
English
Level of difficulty: 
Medium
Booking required: 
No
 
Lab description and primary aims of the lab: 

The objective of this lab is to prepare:

  • A true solution of common salt, sugar and alum
  • A suspension of soil, chalk powder and fine sand in water
  • A colloidal of starch in water and egg albumin in water

And distinguish between the above solutions on the basis of:

  1. Transparency
  2. Filtration criterion
  3. Stability 

Learning Outcomes

  1. Students understand the terms: true solution, suspension, colloid, transparency, filterability, stability, etc.
  2. Students distinguish true solutions, suspensions and colloids based on experiments testing:
    • Transparency
    • Filtration
    • Stability
  3. Students classify the mixtures given to them as true solutions, suspensions and colloids based on the information from the experiment.
  4. Students acquire skills to perform the experiments for testing the transparency, filtration criterion and stability of true solutions, suspensions and colloids.

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