Physical Properties of Solids - Recrystallization

Recrystallization: 24-Hour method

• 1. Students will reuse the large clear plastic cups and solutions from Activity 2.3 according to the procedure below.

     1. Procedure

        1. Dip a cotton swab into one of the solutions. Apply the solution in a circular motion to its labeled area on the activity sheet. Repeat until as much of the circle is covered with the solution as possible.

        2. Using clean cotton swabs, repeat Step 2 for the other four solutions. Set the paper aside and check it in about an hour. If not much crystal has formed; check it again in another hour.

        3. Allow the solutions to sit overnight.

  2. The next day, have students observe the crystals and fill in part 4 of the Physical Properties of Solids Assignment Sheet

  3. From http://www.inquiryinaction.org/