Chem 40 – Theme 1 | Identifying 12 Mysterious Solutions


You have discovered an abandoned laboratory during your expedition to Mars. There are 12 unidentified solutions with labels that have been removed are found in front of you. For your surivival, you must identify these 12 mysterious solutions, and describe the practical uses of each of them. There is a list of the 12 unknown potential chemicals located at the front of the laboratory.

Since the identity of each solution is not known, you must treat every solution with care and proper WHMIS procedures. 

You have only about 12-15 ml of solution to work with, so make sure you know how to do all the testing before starting.

Furthermore, the theory behind each of the tests are paramount to your understanding. Make sure you are learning the theory and completing the required practice sheets as well.

12 Mysterious Solutions Introduction Video

What you need to learn

Specific Outcomes

  1. Explain at the particulate and symbolic level solubility and precipitate (C12-01-01)
  2. Develop and Use solubility rules to predict the formation of a precipitate (C12-01-02, C12-01-03, C12-01-07)

How you are assessed


  1. Lab report on the identifications of 12 Mysterious Solutions
  2. Practical uses of the identified solutions
  3. Quizzes on writing ionic, net ionic, and predicting precipitates.


  1. Presentation rubric
  2. Lab report rubric


Tutorial Videos

Watch these to help and guide you along. You are expected to watch all of these videos and complete the workbook required. 

  1. What is the structure of water? 
  2. Writing ionic and net ionic reactions
  3.  Reading solubility table to predict precipitates

Useful notes


  1. Aqueous Solutions – Notes 1 – Notes 1 Basic definition for solutions
  2. Aqueous solutions – notes 2 – Neutralization definition and reaction
  3. Aqueous solutions – notes 3 – qualitative – Qualitative analysis notes

Other information

List of 12 possible solutions

  • Silver nitrate
  • Copper (II) sulfate
  • Nickel (II) chloride
  • Lead (II) nitrate
  • Potassium chromate
  • Aluminum chloride
  • Sodium carbonate
  • Sodium acetate
  • Hydrochloric acid
  • Sodium hydroxide
  • Ammonium hydroxide
  • Iron (III) nitrate