Pre-Laboratory Quiz

Name: _________________
Pre-Laboratory Quiz 2
Section (day and time): _________________
Synthesis of Alum
1. The soidum hydroxide you will use in this experiment is highly corrosive
2. Vacuum filtration is the ONLY filtration technique you will use in this lab.
True False
3. In order to ensure that crystallization of alum begins you may need to:
A. Put another piece of aluminum in the flask.
B. Add more KOH (potassium hydroxide) to the flask.
C. Heat the flask.
D. Scratch the sides of the flask with a stirring rod.
4. You will be reporting percent yield for this experiment. In order to do this you
will need:
A. Mass of the aluminum used
B. Mass of alum crystals formed
C. Both A and B
5. Will you need a source of heat for this experiment?