Project 6: Properties of Matter and Separations Week 1: Prelab Organizational Questions 1. What is your group’s unknown number and which compounds are in your group’s unknown? 2. Draw the structures of your group’s compounds. Be sure to include valence electrons. 3. Look up and record the solubility in water for each of your three compounds. 4. Define pka and list the pka of each of your solids. 5. How does pH of a solution affect solubility? 6. How does polarity affect solubility?