I did the electrolysis lab with 5,6,7, and 8th graders. They were all able to follow the directions and have a successful circuit. Here are some of the modifications that I made: I measured the pipette stems before the lab, so all that they had to do was cut them evenly. I made sure the graphite was the proper length and allowed them to place the pin holes in a marked dot on the bulb of the pipette. We mixed up the colors of alligator clips so that it was easier to read and draw their "t" and "-" connections. I placed the battery in a clear plastic cup to avoid water damage or safety concerns from spillage. The edge of the small, white plastic cup which held the solution was cut with a "V" shaped notch to allow for the graphite to hold itself in place. The set-up and clean-up were minimal. We would have fun doing this lab again!
Thu, 12/13/2012 - 15:55
Karen your modifications were great ideas! I had the students do all the setup, but split the lesson to do set up one day, then adding the solution and completing the last circuit connection the next day. Notching the solution cup and putting the battery in a 2nd cup helped keep the solution cup from falling over. Our 2nd cups were tall enough to hold the extra wire and make the alligator clips make contact with the graphite from above instead of the side or below.
Wed, 12/19/2012 - 15:41
Thank you for your detailed explanation of how you modified this lab. I am trying to do as many activities from this module as possible and am also trying to save time. Our chemistry unit is over but I plan to do this when we get back to school after the break. Happy Holidays and thank you again! Selene
Wed, 01/02/2013 - 17:55
Module 2 Lesson Plan: Water Properties 2
Tue, 11/27/2012 - 17:29
I shall follow your modifications when I do this activity. Marietta